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  Subjects -> ENGINEERING (Total: 2269 journals)
    - CHEMICAL ENGINEERING (190 journals)
    - CIVIL ENGINEERING (181 journals)
    - ELECTRICAL ENGINEERING (101 journals)
    - ENGINEERING (1203 journals)
    - ENGINEERING MECHANICS AND MATERIALS (389 journals)
    - HYDRAULIC ENGINEERING (55 journals)
    - INDUSTRIAL ENGINEERING (61 journals)
    - MECHANICAL ENGINEERING (89 journals)

ENGINEERING (1203 journals)            First | 1 2 3 4 5 6 7 | Last

Showing 1001 - 1200 of 1205 Journals sorted alphabetically
Progress in Agricultural Engineering Sciences     Full-text available via subscription  
Progress in Computational Fluid Dynamics, An International Journal     Hybrid Journal   (Followers: 7)
Progress in Energy and Combustion Science     Full-text available via subscription   (Followers: 10)
Progress in Nanotechnology and Nanomaterials     Open Access   (Followers: 4)
Progress in Photovoltaics: Research & Applications     Hybrid Journal   (Followers: 6)
Progress in Polymer Science     Full-text available via subscription   (Followers: 32)
Propellants, Explosives, Pyrotechnics     Hybrid Journal   (Followers: 264)
Propulsion and Power Research     Open Access   (Followers: 23)
Purinergic Signalling     Hybrid Journal   (Followers: 1)
Quaderns d’Història de l’Enginyeria     Open Access  
Quality and Reliability Engineering International     Hybrid Journal   (Followers: 13)
Quality Engineering     Hybrid Journal   (Followers: 9)
Radiochimica Acta     Hybrid Journal   (Followers: 5)
Rapid Prototyping Journal     Hybrid Journal   (Followers: 3)
Rare Metals     Hybrid Journal  
Reactive and Functional Polymers     Hybrid Journal   (Followers: 5)
Recent Patents on Engineering     Full-text available via subscription   (Followers: 3)
Recent Patents on Nanotechnology     Full-text available via subscription   (Followers: 3)
Recherche Transports Sécurité     Hybrid Journal   (Followers: 1)
Redes de Ingeniería     Open Access  
Regional Maritime University Journal     Full-text available via subscription   (Followers: 2)
Regular and Chaotic Dynamics     Hybrid Journal  
Rem : Revista Escola de Minas     Open Access   (Followers: 1)
Remote Sensing     Open Access   (Followers: 37)
Remote Sensing Letters     Hybrid Journal   (Followers: 36)
Requirements Engineering     Hybrid Journal   (Followers: 3)
Research Ideas and Outcomes     Open Access  
Research in Engineering Design     Hybrid Journal   (Followers: 11)
Research Journal of Nanoscience and Nanotechnology     Open Access   (Followers: 20)
Research Works of Air Force Institute of Technology     Open Access   (Followers: 1)
Resonance     Hybrid Journal   (Followers: 26)
Reviews in Advanced Sciences and Engineering     Partially Free   (Followers: 2)
Revista AIDIS de Ingeniería y Ciencias Ambientales. Investigación, desarrollo y práctica     Open Access  
Revista Brasileira de Engenharia Agrícola e Ambiental     Open Access   (Followers: 1)
Revista Ciencias e Ingeniería al Día     Open Access  
Revista CINTEX     Open Access  
Revista Cubana de Ingeniería     Open Access  
Revista de Engenharia da Universidade Católica de Petrópolis     Open Access  
Revista de Ingeniería     Open Access  
Revista de Ingenieria Sismica     Open Access  
Revista de Investigación, Desarrollo e Innovación     Open Access  
Revista EIA     Open Access   (Followers: 1)
Revista Facultad de Ingeniería     Open Access   (Followers: 1)
Revista Facultad de Ingenieria - Universidad de Tarapaca     Open Access  
Revista Facultad de Ingeniería Universidad de Antioquia     Open Access   (Followers: 1)
Revista Fatec Zona Sul : REFAS     Open Access  
Revista Iberoamericana de Automática e Informática Industrial RIAI     Open Access  
Revista Informador Técnico     Open Access   (Followers: 1)
Revista Ingenieria de Construcción     Open Access  
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería     Open Access  
Revista Logos Ciencia & Tecnología     Open Access  
Revista Petra     Open Access  
Revue de Métallurgie     Full-text available via subscription  
Russian Engineering Research     Hybrid Journal  
Russian Journal of Non-Ferrous Metals     Hybrid Journal   (Followers: 22)
Russian Microelectronics     Hybrid Journal   (Followers: 1)
Sadhana     Open Access   (Followers: 7)
Safety Science     Hybrid Journal   (Followers: 25)
Scholedge International Journal of Multidisciplinary & Allied Studies     Open Access   (Followers: 2)
Science & Technique     Open Access  
Science and Engineering Ethics     Hybrid Journal   (Followers: 9)
Science and Technology     Open Access   (Followers: 2)
Science China Technological Sciences     Hybrid Journal  
Science Journal of Volgograd State University. Technology and innovations     Open Access  
Science Progress     Full-text available via subscription   (Followers: 3)
Scientia cum Industria     Open Access  
Scientific Journal of Control Engineering     Open Access   (Followers: 1)
Scientific Journal of Review     Open Access  
Sealing Technology     Full-text available via subscription   (Followers: 1)
Securitas Vialis     Hybrid Journal  
Security and Communication Networks     Hybrid Journal   (Followers: 3)
Selcuk University Journal of Engineering, Science and Technology     Open Access  
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 46)
Semiconductors     Hybrid Journal  
Semiconductors and Semimetals     Full-text available via subscription  
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 1)
Sensor Letters     Full-text available via subscription   (Followers: 2)
Sensors     Open Access   (Followers: 14)
Separation and Purification Technology     Hybrid Journal   (Followers: 10)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 5)
Shock and Vibration     Hybrid Journal   (Followers: 8)
SIAM Journal on Applied Dynamical Systems     Hybrid Journal   (Followers: 2)
SIAM Journal on Mathematical Analysis     Hybrid Journal   (Followers: 3)
SIAM Journal on Matrix Analysis and Applications     Hybrid Journal   (Followers: 1)
SIAM Journal on Numerical Analysis     Hybrid Journal   (Followers: 4)
SIAM Journal on Optimization     Hybrid Journal   (Followers: 8)
SIAM Review     Hybrid Journal   (Followers: 6)
SILICON     Hybrid Journal  
Sistemas & Telemática     Open Access   (Followers: 1)
Sleep and Biological Rhythms     Hybrid Journal   (Followers: 6)
Small     Hybrid Journal   (Followers: 11)
Smart Grid     Open Access  
Soft Computing     Hybrid Journal   (Followers: 7)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 54)
Soil Dynamics and Earthquake Engineering     Hybrid Journal   (Followers: 14)
Soldagem & Inspeção     Open Access  
Solid-State Circuits Magazine, IEEE     Hybrid Journal   (Followers: 9)
SourceOCDE Developpement urbain, rural et regional     Full-text available via subscription   (Followers: 1)
SourceOCDE Energie     Full-text available via subscription  
SourceOECD Energy     Full-text available via subscription  
SourceOECD Science and Technology Statistics - SourceOCDE Base de donnees des sciences et de la technologie     Full-text available via subscription  
SourceOECD Transport     Full-text available via subscription   (Followers: 3)
SourceOECD Urban, Rural and Regional Development     Full-text available via subscription   (Followers: 1)
South African Computer Journal     Full-text available via subscription  
South African Journal of Agricultural Extension     Open Access   (Followers: 4)
South African Journal of Science     Open Access   (Followers: 3)
Sports Engineering     Hybrid Journal   (Followers: 3)
Stahlbau     Hybrid Journal   (Followers: 3)
Steel in Translation     Hybrid Journal  
Steel Research International     Hybrid Journal   (Followers: 24)
Stochastic Analysis and Applications     Hybrid Journal   (Followers: 2)
Stochastic Processes and their Applications     Hybrid Journal   (Followers: 5)
Stochastics and Dynamics     Hybrid Journal  
Strain     Hybrid Journal   (Followers: 2)
Strategic Planning for Energy and the Environment     Hybrid Journal   (Followers: 4)
Studies in Engineering and Technology     Open Access  
Studies in Interface Science     Full-text available via subscription   (Followers: 1)
Studies in Logic and Practical Reasoning     Full-text available via subscription  
Studies in Surface Science and Catalysis     Full-text available via subscription   (Followers: 1)
Superconductor Science and Technology     Hybrid Journal   (Followers: 2)
Surface Engineering     Hybrid Journal   (Followers: 3)
Surface Review and Letters     Hybrid Journal   (Followers: 1)
Surface Science Reports     Full-text available via subscription   (Followers: 15)
Survey Review     Hybrid Journal   (Followers: 6)
Surveying and Land Information Science     Full-text available via subscription   (Followers: 2)
Sustainability Science     Hybrid Journal   (Followers: 7)
Sustainability Science and Engineering     Full-text available via subscription   (Followers: 4)
Sustainable Management of Sediment Resources     Full-text available via subscription  
Swiss Journal of Geosciences     Hybrid Journal  
Symmetry     Open Access  
Synthesis Lectures on Algorithms and Software in Engineering     Full-text available via subscription  
Synthesis Lectures on Antennas     Full-text available via subscription   (Followers: 5)
Synthesis Lectures on Biomedical Engineering     Full-text available via subscription  
Synthesis Lectures on Computational Electromagnetics     Full-text available via subscription   (Followers: 4)
Synthesis Lectures on Energy and the Environment: Technology, Science, and Society     Full-text available via subscription   (Followers: 2)
Synthesis Lectures on Engineering     Full-text available via subscription  
Synthesis Lectures on Global Engineering     Full-text available via subscription  
Synthesis Lectures on Professionalism and Career Advancement for Scientists and Engineers     Full-text available via subscription   (Followers: 1)
Synthetic Metals     Hybrid Journal   (Followers: 4)
Systems Engineering     Hybrid Journal   (Followers: 6)
Systems Engineering Procedia     Open Access  
Systems Research Forum     Hybrid Journal  
Systems Science & Control Engineering     Open Access   (Followers: 5)
Techno.Com     Open Access  
Technological Engineering     Open Access  
Technologies     Open Access   (Followers: 1)
TECHNOLOGY     Hybrid Journal  
Technology and Innovation     Full-text available via subscription   (Followers: 3)
Technology in Society     Hybrid Journal   (Followers: 4)
Technometrics     Full-text available via subscription   (Followers: 6)
Tecnologia, Ciencia, Educacion     Open Access   (Followers: 1)
Tecnura     Open Access  
Telecommunications Policy     Hybrid Journal   (Followers: 27)
Terahertz Science and Technology, IEEE Transactions on     Hybrid Journal   (Followers: 2)
Textile Science and Technology     Full-text available via subscription   (Followers: 3)
The Journal of Supercomputing     Hybrid Journal   (Followers: 1)
The Scientific World Journal     Open Access  
Theoretical and Computational Fluid Dynamics     Hybrid Journal   (Followers: 12)
Theoretical Issues in Ergonomics Science     Hybrid Journal   (Followers: 3)
Thermal Engineering     Hybrid Journal   (Followers: 6)
Tikrit Journal of Engineering Science     Open Access  
tm - Technisches Messen     Hybrid Journal   (Followers: 2)
Topics in Catalysis     Hybrid Journal   (Followers: 1)
Traffic Injury Prevention     Hybrid Journal   (Followers: 63)
TRANSACTIONS of the VŠB - Technical University of Ostrava, Safety Engineering Series     Open Access   (Followers: 1)
Transactions of Tianjin University     Full-text available via subscription  
Transport and Telecommunication Journal     Open Access   (Followers: 4)
Transport World Africa     Full-text available via subscription   (Followers: 3)
Transportation Research Record : Journal of the Transportation Research Board     Full-text available via subscription   (Followers: 34)
Transportmetrica A : Transport Science     Hybrid Journal   (Followers: 4)
Trends in Applied Sciences Research     Open Access   (Followers: 1)
Tribology in Industry     Open Access   (Followers: 1)
Tribology International     Hybrid Journal   (Followers: 41)
Tribology Letters     Hybrid Journal   (Followers: 5)
Tribology Transactions     Hybrid Journal   (Followers: 33)
Tribotest     Hybrid Journal  
Tropical Science     Hybrid Journal   (Followers: 1)
Turkish Journal of Engineering and Environmental Sciences     Open Access   (Followers: 1)
Ultramicroscopy     Hybrid Journal   (Followers: 2)
Uludağ University Journal of The Faculty of Engineering     Open Access  
Universal Journal of Applied Science     Open Access   (Followers: 2)
Universal Journal of Engineering Science     Open Access   (Followers: 1)
Utilities Policy     Hybrid Journal   (Followers: 2)
Vacuum     Hybrid Journal   (Followers: 12)
Virtual and Physical Prototyping     Hybrid Journal   (Followers: 3)
Visualization in Engineering     Open Access  
Walailak Journal of Science and Technology     Open Access  
Waste and Biomass Valorization     Hybrid Journal   (Followers: 1)
Waste Management Series     Full-text available via subscription   (Followers: 2)
Waves in Random and Complex Media     Hybrid Journal  
Waves, Wavelets and Fractals     Open Access  
Wear     Hybrid Journal   (Followers: 28)
Welding in the World     Hybrid Journal   (Followers: 2)
West African Journal of Industrial and Academic Research     Open Access   (Followers: 1)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 11)
World Journal of Engineering     Full-text available via subscription   (Followers: 3)
World Journal of Engineering and Technology     Open Access  
World Journal of Environmental Engineering     Open Access   (Followers: 2)
World Pumps     Full-text available via subscription   (Followers: 2)
World Science and Technology     Full-text available via subscription   (Followers: 1)

  First | 1 2 3 4 5 6 7 | Last

Journal Cover Ionics
  [SJR: 0.486]   [H-I: 36]   [2 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1862-0760 - ISSN (Online) 0947-7047
   Published by Springer-Verlag Homepage  [2335 journals]
  • Fading analysis of the Li(NiCoMn)O 2 battery under different SOC cycle
           intervals
    • Authors: Yiduo Zhu; Fuwu Yan; Jianqiang Kang; Changqing Du; Chi Zhang; Richard Fiifi Turkson
      Abstract: Abstract In a review of literature on operating conditions, such as temperature, materials, cutoff voltage, and current rate, state-of-charge (SOC) interval has attracted less attention regarding research on cell fading. Lithium-ion cells as power source practically applied to electric vehicles (EVs) are seldom operated in the entire SOC interval, which means that lithium-ion cells are employed in a certain SOC interval. However, the SOC interval that facilitates the increase of the life span of the cell remains unknown. In the current study, several cells are tested over different SOC intervals and discharge rates. In-depth analysis is performed on the influence of the two factors on cell fading. The incremental capacity and incremental resistance methods are used to analyze capacity fading and resistance evolution. The electrochemical mechanism analysis of cell fading is studied and discussed, showing that SOC interval influences the rate of cell degradation. Results show that a low SOC interval prolongs the life span of cell use if other operating conditions are similar. Therefore, the study provides a theoretical framework and reference for the cell maintenance of EVs.
      PubDate: 2017-01-14
      DOI: 10.1007/s11581-016-1968-7
       
  • Researches on the structure and electrochemical properties of Mo x V 2-x O
           5+y nanosheets
    • Authors: Shan Lu; Zhongdan Xue; Yuqing Chen; Fangchao Wan; Quanyao Zhu; Galina S. Zakharova
      Abstract: Abstract Vanadium pentoxide (V2O5) with various nanostructures has been investigated during the past decades. Notably, two-dimensional V2O5 nanosheets had attracted most attentions due to the large mass density. Here, the V2O5 nanosheets doped by MoO3 (MoxV2-xO5+y) have been synthesized by sol-gel method combined with freezing–drying process. The structures and morphology of MoxV2-xO5+y were characterized by XRD, FTIR, TEM, and FESEM analysis. The MoxV2-xO5+y show a two-dimensional layered structure and the XRD can be indexed to an orthorhombic V2O5 phase. Meanwhile, the doping of MoO3 was confirmed by the XPS and TEM analysis. The electrochemical behaviors of the nanocomposites were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge test. As a result, the interlayer spacing of the Mox V2-x O5+y nanosheets were inlarged by V2MoO8. The improvment of electrochemical properties was due to defects and the layer structure.
      PubDate: 2017-01-14
      DOI: 10.1007/s11581-016-1949-x
       
  • Vegetable polyol phosphate as corrosion inhibitor of carbon steel in
           packer fluid solutions
    • Authors: Rita Cristina da Silva; Melissa Heinen; Gabriel A. Lorenzi; Cesar L. Petzhold; Emilse M. A. Martini
      Abstract: Abstract Glyoxal is a potential sequestrant of H2S in the pre-salt exploration. However, the mixture containing packer fluid and glyoxal is corrosive. The present work aims at enabling the use of glyoxal by addition of an environmentally friendly polyol phosphate as corrosion inhibitor. EIS, corrosion potential (Ecorr), and Tafel analysis over the immersion period of the AISI 1020 carbon steel were used in the investigation. Dosage (500 ppm) of polyol phosphate in glyoxal and packer fluid system increases the polarization resistance and decreases both the capacitance and the corrosion current. Polyol phosphate is effective as corrosion inhibitor, due to its adsorption on the metal surface or on the film of the previously formed oxide in good agreement with the Langmuir isotherm.
      PubDate: 2017-01-13
      DOI: 10.1007/s11581-016-1956-y
       
  • Preparation of TEMPO-contained pyrrole copolymer by in situ
           electrochemical polymerization and its electrochemical performances as
           cathode of lithium ion batteries
    • Authors: Lihuan Xu; Pengju Guo; Huihui He; Ningning Zhou; Jiaojiao Ma; Guosheng Wang; Cheng Zhang; Chang Su
      Abstract: Abstract Composite electrodes based on the nitroxide free radical-contained pyrrole copolymer (PPy-co-PPy-C-TEMPO) as active material were one-step synthesized by in situ electrochemical polymerization, which was then directly applied as the cathode of lithium ion batteries. The structure, morphology, electrochemical property, and charge-discharge performances of prepared copolymers were characterized by FTIR, SEM, cyclic voltammogram, electrochemical impedance spectroscopy, and galvanostatic charge-discharge testing, respectively. The results demonstrated that PPy-co-PPy-C-TEMPO-based composite cathodes have been successfully prepared by in situ electrochemical method, and the introduction of the nitroxide free radical (TEMPO) could obviously affect the morphology and electrochemical characteristics of the obtained electroactive polymers. And the charge/discharge tests showed that with the introduction of the TEMPO, PPy-co-PPy-C-TEMPO-based composite cathodes exhibited an improved specific capacity of 70.9 mAh g−1 for PPy-co-PPy-C-TEMPO (4:1) and 62.6 mAh g−1 for PPy-co-PPy-C-TEMPO (8:1) as measured at 20 mA g−1 between 2.5 and 4.2 V, which were remarkably higher than that of the pure PPy cathode of 41.0 mAh g−1 under the same experimental conditions. Also, the obtained PPy-co-PPy-C-TEMPO copolymers demonstrated an acceptable cycling stability during the charge-discharge process. These obtained cell performances for the composite cathodes were attributed to the application of the in situ electrochemical polymerization technology, which enhanced the intimate integration between conductive polymer film and electrode. Furthermore, the introduction of TEMPO-contained pyrrole (Py-C-TEMPO) improved the morphology of the composite cathode, which was in favor of the utilization of active materials and the improved electrochemical performances.
      PubDate: 2017-01-13
      DOI: 10.1007/s11581-016-1965-x
       
  • CeO 2 and Nb 2 O 5 modified Ni-YSZ anode for solid oxide fuel cell
    • Authors: Pankaj Kr. Tiwari; Suddhasatwa Basu
      Abstract: Abstract Ni sintering at high temperature (∼ 800 °C) operation drastically degrades the performance of Ni-yttria-stabilized zirconia (YSZ) anode in solid oxide fuel cell (SOFC). Mixed ionic and electronic conductive oxides such as CeO2 and Nb2O5 enhance the dispersion of Ni, CeO2 enhances the redox behavior and promotes charge transfer reactions, and Nb2O5 increases the triple phase boundary. In the present work, anode-supported SOFC is fabricated and tested in H2 fuel at 800 °C. YSZ and lanthanum strontium manganite (LSM)-YSZ are used as the electrolyte and composite cathode with NiO-YSZ, CeO2-NiO-YSZ, and Nb2O5-NiO-YSZ as an anode. The peak power density obtained for the cell with 10% CeO2–30% NiO-YSZ anode at the 5 and 25 h of operation is 330 and 290 mW cm−2 which is higher than that for 40% NiO-YSZ anode (275 mW cm−2 at 5 h). The peak power density obtained for the cell with 10% Nb2O5–30% NiO-YSZ anode at the 5 and 25 h of operation is 301 and 285 mW cm−2 which is higher than that for 40% NiO-YSZ anode (275 mW cm−2 at 5 h). Physical characterization has been carried to study morphology, elemental analysis, particle size, and phase formation of the fabricated anode before and after cell operation to correlate the cell performance.
      PubDate: 2017-01-12
      DOI: 10.1007/s11581-016-1945-1
       
  • Application of nickel oxide nanoparticles in electrochromic materials
    • Authors: De-Long Sun; Bo-Wen Zhao; Jing-Bing Liu; Hao Wang; Hui Yan
      Abstract: Abstract This study presents the application of NiO nanoparticles in electrochromic materials field. The monodisperse NiO nanoparticles ranged from 5 to 8 nm were synthesized by hot-injection method and the NiO films were prepared by dip-coating technique on ITO glass. The structure, electrochemical as well as optical performance was investigated systematically. NiO films composing of nanoparticles maintained the porous microstructure and exhibited excellent electrochromic performance. It was clear that the film annealed at 300 °C exhibited the highest electrochemical activity and improved transmittance modulation (∆T), while maintaining faster response time.
      PubDate: 2017-01-12
      DOI: 10.1007/s11581-017-1974-4
       
  • Polymer electrolytes for lithium ion batteries: a critical study
    • Authors: Anil Arya; A. L. Sharma
      Abstract: Abstract Polymer electrolytes (PEs) are an essential component being used in most energy storage/conversion devices. The present review article on a brief history, advantage, and their brief application of polymer electrolyte systems. It consists of a glimpse on liquid, gel, and solid polymer electrolyte and a contrast comparison concerning benefits/disadvantages among the three. The article started with a brief introduction of polymer electrolytes followed by their varieties and extreme uses. The role of host polymer matrix by taking numerous examples of polymer electrolyte published by the different renowned group of the concerned field has been explored. The criteria for selection of appropriate host polymer, salt, inorganic filler/clay, and aprotic solvents to be used in polymer electrolyte have been discussed in detail. The mostly used polymer, salt, solvents, and inorganic filler/clay list has been prepared in order to keep the data bank at one place for new researchers. This article comprises different methodologies for the preparation of polymer electrolyte films. The different self-proposed mechanisms (like VTF, WLF, free volume theory, dispersed/intercalated mechanisms, etc.) have been discussed in order to explain the lithium ion conduction in polymer electrolyte systems. A numerous characterization techniques and their resulting analysis have been summarized from the different published reports at one place for better awareness of the scientific community/reader of the area.
      PubDate: 2017-01-12
      DOI: 10.1007/s11581-016-1908-6
       
  • Effect of Al 2 O 3 nanofiller on the electrical, thermal and structural
           properties of PEO:PPG based nanocomposite polymer electrolyte
    • Authors: A. Christina Nancy; S. Austin Suthanthiraraj
      Abstract: Abstract A new series of nanocomposite polymer electrolyte (NCPE) system comprising of polyethylene oxide (PEO) and polypropylene glycol (PPG) as blended polymer host, zinc trifluoromethanesulfonate [Zn(CF3SO3)2] as dopant salt and nanocrystalline alumina [Al2O3] as filler was prepared by solution casting technique. The present system consisting of five different compositions of 87.5 wt% (PEO:PPG)–12.5 wt% Zn(CF3SO3)2 + x wt% Al2O3 [where x = 1, 3, 5, 7 and 9, respectively] has been thoroughly characterized by various analytical techniques such as electrical impedance spectroscopy, X-ray diffraction (XRD) studies, differential scanning calorimetry (DSC), scanning electron microscopic (SEM) analysis and linear sweep voltammetry (LSV). The maximum room temperature ionic conductivity exhibited by the NCPE was found to be 2.1 × 10−4 S cm−1 for 3 wt% loading of Al2O3 which is an order higher than that of the optimized filler-free zinc salt doped polymer electrolyte system at 298 K. The evidence of a decrease in the degree of crystallinity responsible for the enhanced conductivity was revealed by the XRD data and further confirmed by DSC and SEM results. Moreover, the electrochemical stability window of the highly conducting electrolyte matrix has been experimentally determined by linear sweep voltammetry and found to be 3.6 V which is fairly adequate for the construction of zinc primary batteries as well as zinc-based rechargeable batteries at ambient conditions.
      PubDate: 2017-01-12
      DOI: 10.1007/s11581-017-1976-2
       
  • Special proceedings of the International Symposium on Materials and Assets
           Integrity (ISMAI 2016) “Advancements and Innovations in Materials and
           Asset Integrity Analysis and Management” during 10 th International
           Materials Technology Conference & Exhibition (IMTCE 2016), Kuala
           Lumpur, Malaysia, 16–18 May 2016
    • Authors: A. K. Arof; B. Sahraoui; Tan Winie
      PubDate: 2017-01-11
      DOI: 10.1007/s11581-016-1960-2
       
  • Novel synthesis and characterization of ZnCo 2 O 4 nanoflakes grown on
           nickel foam as efficient electrode materials for electrochemical
           supercapacitors
    • Authors: Hamid Heydari; Mohammad Bagher Gholivand
      Abstract: Abstract ZnCo2O4 nanoflakes were directly grown on Ni foam via a two-step facile strategy, involving cathodic electrolytic electrodeposition (ELD) method and followed by a thermal annealing treatment step. The results of physical characterizations exhibit that the mesoporous ZnCo2O4 nanoflakes have large electroactive surface areas (138.8 m2 g−1) and acceptable physical stability with the Ni foam, providing fast electron and ion transport sites. The ZnCo2O4 nanoflakes on Ni foam were directly used as integrated electrodes for supercapacitors and their electrochemical properties were measured in 2 M KOH aqueous solution. The ZnCo2O4 nanoflake electrode exhibits a high capacitance of 1781.7 F g−1 at a current density of 5 A g−1 and good rate capability (62% capacity retention at 50 A g−1). Also, an excellent cycling ability at various current densities from 5 to 50 A g−1 was obtained and 92% of the initial capacitance maintained after 4000 cycles. The results demonstrate that the proposed synthesis route is cost-effective and facile and can be developed for preparation of electrode materials in other electrochemical supercapacitors.
      PubDate: 2017-01-11
      DOI: 10.1007/s11581-016-1959-8
       
  • N-doped graphene/Bi nanocomposite with excellent electrochemical
           properties for lithium–ion batteries
    • Authors: Yan Zhang; Qian Wang; Bo Wang; Yi Mei; Peichao Lian
      Abstract: Abstract N-doped graphene/Bi nanocomposite was prepared via a two-step method, combining the gas/liquid interface reaction with the rapid heat treatment method. The as-prepared sample was characterized by X-ray diffraction (XRD), field-emission scanning electron microscope (FESEM), X-ray photoelectron spectroscopy (XPS), and elemental analyzer. The XRD, FESEM, XPS, and elemental analysis results confirm the successful synthesis of N-doped graphene/Bi nanocomposite. As a result, the prepared N-doped graphene/Bi nanocomposite as an anode material for lithium-ion batteries delivers excellent electrochemical performance. A high lithium storage capacity of about 522 mAh g−1 in the voltage range of 0.01–3.5 V is obtained. After 50 cycles at different current densities from 50 to 1000 mA g−1, the specific capacity can still remain 386 mAh g−1. Even at the high current density of 1000 mA g−1, the N-doped graphene/Bi nanocomposite can still deliver a specific capacity of 218 mAh g−1. The excellent electrochemical performance of the N-doped graphene/Bi nanocomposite is supposed to benefit from the high electronic conductivity of nitrogen-doped graphene and the synergistic effect of bismuth nanoparticles and nitrogen-doped graphene.
      PubDate: 2017-01-10
      DOI: 10.1007/s11581-017-1975-3
       
  • AC conductivity and dielectric behavior in mixed electronic-ionic 30Li 2
           O–4MoO 3 –(66– x )TeO 2 – x V 2 O 5 glass system
    • Authors: Rosdiyana Hisam; Ahmad Kamal Yahya; Halimah Mohamed Kamari; Zainal Abidin Talib
      Abstract: Abstract AC conductivity, dielectric property, and electric modulus formalism of lithium molybdenum tellurite glasses containing vanadium with compositions 30Li2O–4MoO3–(66–x)TeO2–xV2O5 (x = 0.2, 0.4, 0.6, 0.8, 1.0, and 1.2) have been studied in the frequency range 10−2 Hz to 1 MHz and temperature range 323–413 K to investigate the effects of mixed ionic–electronic carriers in the glasses. The variation of AC conductivity with V2O5 showed a nonlinear increase for x ≤ 0.6 mol% before decreasing to a minimum at 0.8 mol% V2O5. The decrease in σ AC attributed to some forms of blocking effect on Li+ ions caused by the mixed ionic–electronic (MIE) effect. Meanwhile, dielectric constant showed a general increase for x ≤ 0.6 before an anomalous decrease at x = 0.8 mol% V2O5, which was followed by a large increase at x > 0.8 mol%. The decrease at x = 0.8 mol% coincided with the σ AC drop at the same location. This decrease was also suggested related to the MIE that induced a blocking effect, which caused the restricted dipole movement.
      PubDate: 2017-01-10
      DOI: 10.1007/s11581-017-1973-5
       
  • Design and synthesis of highly stable poly(tetrafluoroethylene)-zirconium
           phosphate (PTFE-ZrP) ion-exchange membrane for vanadium redox flow battery
           (VRFB)
    • Authors: Murali M. Seepana; Jay Pandey; Anupam Shukla
      Abstract: Abstract Vanadium redox flow battery (VRFB) is a promising technology for large-scale renewable energy storage. Design of ion-exchange membrane (IEM) with desired properties like low-cost, mechanically chemically stable, low vanadium ion permeability and high proton conductivity is one of the major challenges. Here, we report the design and synthesis of novel poly(tetrafluoroethylene)-zirconium phosphate (PTFE-ZrP) asymmetric IEM using a simple brush coating method. XRD results confirmed the presence of α-ZrP crystalline phase onto the top layer of the membrane. Excellent mechanical strength was observed with burst pressure of 3.22 × 105 N m−2. Oxidative stability of membrane in Fenton’s reagent was much better than Nafion-115. Vanadium ion (V4+) permeability of the membrane was more than three times lower than that of Nafion-115. Single-cell VRFB with PTFE-ZrP membrane showed ∼80% energy efficiency below 30 mA cm−2. Very high columbic efficiency ∼100% of VRFB with PTFE-ZrP membrane confirmed little contamination of electrolyte due to cross-mixing.
      PubDate: 2017-01-10
      DOI: 10.1007/s11581-016-1967-8
       
  • Morphology-controlled PANI nanowire electrode by using deposition scan
           rate in H 2 SO 4 /PVA polymer electrolyte for electrochemical capacitor
    • Authors: Rusi; C.-K. Sim; S. R. Majid
      Abstract: Abstract Polyaniline (PANI) nanowire electrode was successfully prepared using electrodeposition method. The morphology, thickness, and electrochemical performance of PANI electrode can be controlled by varying the deposition scan rates. Lower deposition scan rate results in compact and aggregates of PANI nanowire morphology. The uniform nanowire of PANI was obtained at the applied scan rate of 100 mV s−1, and it was used as symmetric electrode coupled with H2SO4/polyvinyl alcohol (PVA) gel electrolyte. The different concentrations of H2SO4 acid in polymer electrolyte have influenced the electrochemical performance as well. The optimum specific capacitance and energy density of P100 PANI electrode in 3 M H2SO4/PVA gel polymer electrolyte was 377 F g−1 and 95.4 Wh kg−1 at the scan rate of 1 mV s−1. The good stability of the electrode in this system is applicable to many wearable electronics applications.
      PubDate: 2017-01-09
      DOI: 10.1007/s11581-016-1938-0
       
  • Hydrothermal synthesis of pure LiMn 2 O 4 from nanostructured MnO 2
           precursors for aqueous hybrid supercapacitors
    • Authors: Huijun Zou; Bing Wang; Fengyu Wen; Lianmei Chen
      Abstract: Abstract Pure LiMn2O4 samples with high crystallinity (LMO-1# and LMO-2#) were successfully synthesized by a facile hydrothermal method using δ-MnO2 nanoflowers and α-MnO2 nanowires as the precursors. The as-prepared samples were analyzed by XRD, SEM, and Brunauer-Emmett-Teller (BET), and their capacitive properties were investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge test. Two LiMn2O4 samples showed good capacitive behavior in aqueous hybrid supercapacitors. AC//LMO-1# and AC//LMO-2# delivered the initial specific capacitance of 45.4 and 40.7 F g−1 in 1 M Li2SO4 electrolyte at a current density of 200 mA g−1 in the potential range of 0∼1.5 V, respectively. After 1000 cycles, the capacitance retention was 97.6% for AC//LMO-1# and 93.7% for AC//LMO-2#. Obviously, LMO-1# from δ-MnO2 nanoflowers exhibited higher specific capacitance and better cycling performance than LMO-2#, so LMO-1# was more suitable as the positive electrode material in hybrid supercapacitors.
      PubDate: 2017-01-09
      DOI: 10.1007/s11581-016-1927-3
       
  • Synthesis and application of nanostructured MCo 2 O 4 (M=Co, Ni) for
           hybrid Li-air batteries
    • Authors: Audrey Tan; M.V. Reddy; S. Adams
      Abstract: Abstract We report the synthesis of MCo2O4 (M=Co, Ni) on Ni-mesh by a simple metal acetate decomposition method. Stability tests of the samples in aqueous acidified LiCl, LiOH and LiTFSI in H2O/DME showed that Co3O4/Ni and Co3O4-PVP/Ni are relatively stable in alkaline and neutral environments, with Co3O4/Ni being relatively more stable. For NiCo2O4/Ni and NiCo2O4-PVP/Ni, the low weight percentage change of cobalt in LiTFSI in H2O/DME suggests that they are mostly stable in this electrolyte. The electrochemical performance of the Li-air cell was evaluated using Li anode and a LAGP ceramic separator with above mentioned electrolytes. Co3O4 showed slightly higher catalytic activity for oxygen reduction reaction (ORR) than for oxygen evolution reaction (OER) for the first three cycles. The cell with LiTFSI in H2O/DME as aqueous catholyte showed that NiCo2O4 is a better catalyst for the OER than for the ORR, while the reverse was observed when LiOH was used as the electrolyte.
      PubDate: 2017-01-07
      DOI: 10.1007/s11581-016-1913-9
       
  • The effect of oxygen and water vapor partial pressures on the total
           conductivity of BaCe 0.7 Zr 0.1 Y 0.2 O 3–δ
    • Authors: N. Danilov; J. Lyagaeva; A. Kasyanova; G. Vdovin; D. Medvedev; A. Demin; P. Tsiakaras
      Abstract: Abstract The effect of oxygen and water vapor partial pressure on the total conductivity of the proton-conducting BaCe0.7Zr0.1Y0.2O3–δ material is investigated in the present work. Single-phase and dense ceramic materials have been successfully obtained using the citrate–nitrate synthesis method. The contributions of partial conductivities (hole, oxygen-ionic, protonic) are evaluated based on electrical and emf measurements. At 900 °C in air atmosphere, ionic and hole conductivities almost equivalently contribute to the total conductivity, while in reducing temperatures, the transport of the studied material becomes ionic; the predominant protonic transport (t H ≈ 1) realizes under wet hydrogen atmospheres at temperatures below 700 °C. Based on the measurements of total conductivity as a function of water vapor partial pressure, it is found that the increase of conductivity in reducing atmospheres is associated with the growth of proton conductivity. A non-monotonic change of total conductivity in oxidizing atmospheres is caused by the competing effects, namely decreasing the hole conductivity and increasing the protonic one.
      PubDate: 2017-01-07
      DOI: 10.1007/s11581-016-1961-1
       
  • Capacitive properties of the hydrophobic
           [2-(methacryloyloxy)ethyl]-trimethyl ammonium nonafluoro-1-butanesulfonate
           poly(ionic liquid) thin film
    • Authors: Salvatore Patanè; Claudia Triolo; Paola Cardiano; Sandra Lo Schiavo
      Abstract: Abstract The capacitive behavior of the hydrophobic fluorinated polymeric ionic liquid, poly[2-(methacryloyloxy)ethyl]-trimethyl ammonium nonafluoro-1-butanesulfonate (poly-IL), has been investigated by current-voltage (C-V) measurements and electrochemical impedance spectroscopy (EIS) using a cell featured by a ITO/poly-IL/Al sandwich structure. The data were collected in the temperature range between 30 and 60 °C. The Nyquist plot shows a slope variation that indicates a moderate increasing of the ions mobility with temperature. The Bode diagram reveals that the sample exhibits a capacitive behavior below 104 Hz with no redox processes at the electrodes as confirmed by the C–V curves. The material shows a relatively high thermal stability, probably due to its polymeric nature making the capacitor almost insensitive to the variation of the operating temperature.
      PubDate: 2017-01-07
      DOI: 10.1007/s11581-017-1971-7
       
  • Ionic liquid-based electrolyte with dual-functional LiDFOB additive toward
           high-performance LiMn 2 O 4 batteries
    • Authors: Bingsheng Qin; Shu Zhang; Zhenglin Hu; Zhihong Liu; Junnan Zhang; Jianghui Zhao; Junwei Xiong; Guanglei Cui
      Abstract: Abstract Manganese oxide-based cathodes are one of the most promising lithium-ion battery (LIB) cathode materials due to their cost-effectiveness, high discharge voltage plateau (above 4.0 V vs. Li/Li+), superior rate capability, and environmental benignity. However, these batteries using conventional LiPF6-based electrolytes suffer from Mn dissolution and poor cyclic capability at elevated temperature. In this paper, the ionic liquid (IL)-based electrolytes, consisting of 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfon)imidate (PYR1,4-TFSI), propylene carbonate (PC), lithium bis(trifluoromethanesulfon)imide (LiTFSI), and lithium oxalyldifluoroborate (LiDFOB) additive, were explored for improving the high temperature performance of the LiMn2O4 batteries. It was demonstrated that LiTFSI-ILs/PC electrolyte associated with LiDFOB addition possessed less Mn dissolution and Al corrosion at the elevated temperature in LiMn2O4/Li batteries. Cyclic voltammetry and electrochemical impedance spectroscopy implied that this kind of electrolyte also contributed to the formation of a highly stable solid electrolyte interface (SEI), which was in accordance with the polarization measurement and the Li deposition morphology of the symmetric lithium metal cell, thus beneficial for improving the cycling performance of the LiMn2O4 batteries at the elevated temperature. Cyclic voltammetry and electrochemical impedance spectroscopy implied that the cells using this kind of electrolyte exhibited better interfacial stability, which was further verified by the polarization measurement and the Li deposition morphology of the symmetric lithium metal cell, thus beneficial for improving the cycling performance of the LiMn2O4 batteries at the elevated temperature. These unique characteristics would endow this kind of electrolyte a very promising candidate for the manganese oxide-based batteries.
      PubDate: 2017-01-07
      DOI: 10.1007/s11581-016-1966-9
       
  • Green synthesis of silver nanoparticle-decorated porous reduced graphene
           oxide for antibacterial non-enzymatic glucose sensors
    • Authors: Le Thuy Hoa; Ngo Thi Yen Linh; Jin Suk Chung; Seung Hyun Hur
      Abstract: Abstract A simple and environmentally friendly approach was developed to fabricate silver nanoparticle (Ag NP)-decorated porous reduced graphene oxide (grGO) using glucose as a crosslinking and reducing agent. Physicochemical analysis, such as X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), and field emission-scanning electron microscopy (FE-SEM) were used to confirm the structural, morphological characteristics of the as-prepared samples. The electrocatalytic activity of Ag/grGO towards glucose oxidation was examined by cyclic voltammetry and amperometry. The fabricated sensor showed excellent sensitivity of 725.0 μA cm−2 mM−1 with a rapid response time of 11 s. Furthermore, the hybrids showed significant antibacterial activity against Escherichia coli with 99.76% antibacterial efficiency after 18 h.
      PubDate: 2017-01-06
      DOI: 10.1007/s11581-016-1954-0
       
 
 
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