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  Subjects -> ENGINEERING (Total: 2258 journals)
    - CHEMICAL ENGINEERING (190 journals)
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    - ELECTRICAL ENGINEERING (99 journals)
    - ENGINEERING (1203 journals)
    - ENGINEERING MECHANICS AND MATERIALS (384 journals)
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ENGINEERING (1203 journals)            First | 1 2 3 4 5 6 7 | Last

Showing 1001 - 1200 of 1205 Journals sorted alphabetically
Propellants, Explosives, Pyrotechnics     Hybrid Journal   (Followers: 252)
Propulsion and Power Research     Open Access   (Followers: 19)
Purinergic Signalling     Hybrid Journal   (Followers: 1)
Quaderns d’Història de l’Enginyeria     Open Access  
Quality and Reliability Engineering International     Hybrid Journal   (Followers: 11)
Quality Engineering     Hybrid Journal   (Followers: 9)
Radiochimica Acta     Hybrid Journal   (Followers: 5)
Rapid Prototyping Journal     Hybrid Journal   (Followers: 2)
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: 2)
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: 31)
Remote Sensing Letters     Hybrid Journal   (Followers: 32)
Requirements Engineering     Hybrid Journal   (Followers: 3)
Research Ideas and Outcomes     Open Access  
Research in Engineering Design     Hybrid Journal   (Followers: 10)
Research Journal of Nanoscience and Nanotechnology     Open Access   (Followers: 2)
Research Works of Air Force Institute of Technology     Open Access   (Followers: 1)
Resonance     Hybrid Journal   (Followers: 23)
Review of Symbolic Logic     Full-text available via subscription   (Followers: 1)
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 EIA     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 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: 25)
Russian Microelectronics     Hybrid Journal   (Followers: 1)
Sadhana     Open Access   (Followers: 6)
Safety Science     Hybrid Journal   (Followers: 19)
Scholedge International Journal of Multidisciplinary & Allied Studies     Open Access   (Followers: 2)
Science & Technique     Open Access  
Science and Engineering Ethics     Hybrid Journal   (Followers: 6)
Science and Technology     Open Access   (Followers: 2)
Science China Technological Sciences     Hybrid Journal  
Science in Context     Hybrid Journal   (Followers: 1)
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 Pure and Applied Sciences     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   (Followers: 1)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 41)
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: 1)
Sensors     Open Access   (Followers: 12)
Separation and Purification Technology     Hybrid Journal   (Followers: 10)
Services Computing, IEEE Transactions on     Hybrid Journal   (Followers: 4)
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: 4)
Small     Hybrid Journal   (Followers: 10)
Smart Grid     Open Access  
Soft Computing     Hybrid Journal   (Followers: 6)
Software Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 51)
Soil Dynamics and Earthquake Engineering     Hybrid Journal   (Followers: 12)
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: 2)
Stahlbau     Hybrid Journal   (Followers: 4)
Steel in Translation     Hybrid Journal  
Steel Research International     Hybrid Journal   (Followers: 27)
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: 4)
Synthesis Lectures on Biomedical Engineering     Full-text available via subscription  
Synthesis Lectures on Computational Electromagnetics     Full-text available via subscription   (Followers: 3)
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  
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: 3)
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: 11)
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 Computational Multiphase Flows     Full-text available via subscription  
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: 2)
Thermal Engineering     Hybrid Journal   (Followers: 4)
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: 48)
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: 33)
Transportmetrica A : Transport Science     Hybrid Journal   (Followers: 5)
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: 9)
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)
ZDM     Hybrid Journal  
Zede Journal     Open Access  
Zeitschrift fur Energiewirtschaft     Hybrid Journal   (Followers: 1)

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Journal Cover Ionics
  [SJR: 0.497]   [H-I: 27]   [0 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  [2334 journals]
  • Estimation of temperature distribution of LiFePO 4 lithium ion battery
           during charge–discharge process
    • Authors: Liubin Song; Lingjun Li; Zhongliang Xiao; Jian Zhang; Zhong Cao; Qingqing Zhou; Chaoming Hu; Jiao Liu
      Pages: 1517 - 1525
      Abstract: Abstract Thermal issues of lithium ion batteries are key factors affecting the safety, operational performance, life, and cost of the battery. An electrochemical–thermal coupling model based on thermoelectrochemical basic data was established to investigate the thermal behavior of LiFePO4 lithium ion battery. In this paper, the finite element method was used for simulation of temperature field distribution inside battery during charge–discharge process, and the influence of the charge–discharge rate and ambient temperature on the distribution of temperature field was summarized. The results showed that the highest temperature of battery was recorded at the junction of negative and separator during charge–discharge process. At a low discharge current, the modeling results agreed well with the experimental data. When the ambient temperature was 303.15 K, the maximum temperatures inside the battery were 304.60, 304.83, 306.55, and 309.96 K for 0.1, 0.2, 0.5, and 1.0 C charge–discharge rates, respectively. If the ambient temperature increased to 323.15 K, the maximum temperatures were increased by 24.96, 27.91, 33.18, and 32.59 K for 0.1, 0.2, 0.5, and 1.0 C charge–discharge rates, respectively, and the homogenous temperature field distribution inside the battery was worse.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1678-1
      Issue No: Vol. 22, No. 9 (2016)
       
  • Binder-free combination of amorphous TiO 2 nanotube arrays with highly
           conductive Cu bridges for lithium ion battery anode
    • Authors: Ruijin Meng; Hongying Hou; Xianxi Liu; Jixiang Duan; Song Liu
      Pages: 1527 - 1532
      Abstract: Abstract Binder-free combination of highly conductive Cu bridges with amorphous TiO2 nanotube arrays for lithium ion battery anode were designed and achieved via one-step facile electrodeposition. The obtained composite Cu/TiO2 nanotubes electrode was studied in terms of XRD, SEM, EDX, galvanostatic charge/discharge, cycle stability, rate performance, and AC impedance. As expected, the composite electrode delivered higher discharge capacity, rate performance, and cycle stability than the bare one, possibly due to improved electrical conductivity and the synergy effect between conductive Cu bridges and amorphous TiO2 nanotube arrays.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1680-7
      Issue No: Vol. 22, No. 9 (2016)
       
  • Enhanced electrochemical properties and thermal stability of LiNi 1/3 Co
           1/3 Mn 1/3 O 2 by surface modification with Eu 2 O 3
    • Authors: Weibo Zhu; Zhenyuan Zhuang; Zhiya Lin; Yanmin Yang; Yingbin Lin; Zhigao Huang
      Pages: 1533 - 1540
      Abstract: Abstract Layered LiNi1/3Co1/3Mn1/3O2 cathode material is synthesized via a sol-gel method and subsequently surface-modified with Eu2O3 layer by a wet chemical process. The effect of Eu2O3 coating on the electrochemical performances and thermal stability of LiNi1/3Co1/3Mn1/3O2@Eu2O3 cells is investigated systematically by the charge/discharge testing, cyclic voltammograms, AC impedance spectroscopy, and DSC measurements, respectively. In comparison, the Eu2O3-coated sample demonstrates better electrochemical performances and thermal stability than that of the pristine one. After 100 cycles at 1C, the Eu2O3-coated LiNi1/3Co1/3Mn1/3O2 cathode demonstrates stable cyclability with capacity retention of 92.9 %, which is higher than that (75.5 %) of the pristine one in voltage range 3.0–4.6 V. Analysis from the electrochemical measurements reveals that the remarkably improved performances of the surface-modified composites are mainly ascribed to the presence of Eu2O3-coating layer, which could efficiently suppress the undesirable side reaction and increasing impedance, and enhance the structural stability of active material.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1681-6
      Issue No: Vol. 22, No. 9 (2016)
       
  • Synthesis of high-performance LiMnPO 4 /C /rGO composite via a
           mechanical-activation-assisted polyol process
    • Authors: Jianguo Duan; Guorong Hu; Yanbing Cao; Ke Du; Zhongdong Peng
      Pages: 1541 - 1549
      Abstract: Abstract A mechanical-activation-assisted polyol method for efficient preparation of high-performance rod-like LiMnPO4 composite is developed. The nanosized [Mn3(PO4)2·8H2O + Li3PO4]/graphene oxide (GO) precursors are prepared via a mechano-chemical liquid-phase activation–assisted technique from LiH2PO4 and manganese powder. LiMnPO4/reduced graphene oxide (rGO) samples are obtained by polyol process in boiling triethylene glycol (TEG) and then followed with pyrolytic carbon coating to prepare the LiMnPO4/C/rGo nanocomposite. The characterized results prove that well-crystallized LiMnPO4 nanorods can be successfully synthesized by polyol processing. The LiMnPO4 nanorods have a large percentage of highly oriented (020) facets, which provide a high pore density for Li-ion insertion/extraction. Both rGO modification and further carbon coating significantly improve the conductivity and reduce the charge-transfer resistance. The optimized LiMnPO4/C/rGO composite delivers good electrochemical performance.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1682-5
      Issue No: Vol. 22, No. 9 (2016)
       
  • Enhanced electrochemical properties of ZnO-coated LiMnPO 4 cathode
           materials for lithium ion batteries
    • Authors: K. Rajammal; D. Sivakumar; Navaneethan Duraisamy; K. Ramesh; S. Ramesh
      Pages: 1551 - 1556
      Abstract: Abstract We demonstrated the effect of ZnO (different wt%)-coated LiMnPO4-based cathode materials for electrochemical lithium ion batteries. ZnO-coated LiMnPO4 cathode materials were prepared by the sol-gel method. X-ray diffraction (XRD) analysis indicates that there is no change in structure caused by ZnO coating, and field emission scanning electron microscopy (FESEM) images depict the closely packed particles. Galvanostatic charge-discharge tests show the ZnO-coated LiMnPO4 sample has an enhanced electrochemical performance as compared to pristine LiMnPO4. The 2 wt% of ZnO-based LiMnPO4 exhibited maximum discharge capacity of 102.2 mAh g−1 than pristine LiMnPO4 (86.2 mAh g−1) and 1 wt% of ZnO-based LiMnPO4 (96.3 mAh g−1). The maximum cyclic stability of 96.3 % was observed in 2 wt% of ZnO-based LiMnPO4 up to 100 cycles. This work exhibited a promising way to develop a surface-modified LiMnPO4 using ZnO for enhanced electrochemical performance in device application.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1685-2
      Issue No: Vol. 22, No. 9 (2016)
       
  • Synthesis and electrochemical characterization of olivine-type lithium
           iron phosphate cathode materials via different techniques
    • Authors: R. Muruganantham; M. Sivakumar; R. Subadevi
      Pages: 1557 - 1565
      Abstract: High-potential, eco-friendly LiFePO4 cathode materials were synthesized by polyol, hydrothermal, and solid-state reaction methods. The polyol technique was carried out without any special atmosphere and postheat treatment. The synthesized samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM) with energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectrometry (XPS), and charge-discharge and cyclic voltammetry tests. The LiFePO4 prepared via polyol technique exhibits good electrochemical performance than other method samples do. Graphical abstract ᅟ
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1676-3
      Issue No: Vol. 22, No. 9 (2016)
       
  • Synthesis and characterization of Co-doped lithium manganese oxide as a
           cathode material for rechargeable Li-ion battery
    • Authors: S. Sharmila; B. Janarthanan; J. Chandrasekaran
      Pages: 1567 - 1574
      Abstract: Abstract An attempt has been made to prepare cobalt-doped lithium manganese oxide with three different concentrations by simple molten salt method to enhance the electrical property of Li4Mn5O12. Prepared samples were examined by XRD and SEM to identify its structure and morphology. Electrical properties were identified by impedance and conductivity analysis, and it was found that the material exhibits negative temperature coefficient (NTCR) property, i.e., semi-conducting nature. Among the various concentrations, 0.5 mol of Co-doped lithium manganese oxide has shown good conductivity of 3.1 × 10−5 S cm−1 at 433 K.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1686-1
      Issue No: Vol. 22, No. 9 (2016)
       
  • Simple method for synthesizing few-layer graphene as cathodes in
           surface-enabled lithium ion-exchanging cells
    • Authors: Jun Zong; Yuqi Diao; Fei Ding; Wei Feng; Xingjiang Liu
      Pages: 1575 - 1584
      Abstract: Abstract In order to realize a wider application for graphene materials specifically in the field of energy storage, a simple and mass-scalable method described as “the atmospheric, low-temperature, shock-heating process” is proposed in this work. During this low-temperature process, the graphite oxide without pre-treatment is completely exfoliated to form the few-layer graphene materials at atmospheric conditions. The Brunauer-Emmett-Teller (BET)-specific surface area of acquired material at 350 °C can reach 487 m2 g−1. The acquired few-layer graphene materials are also confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The results demonstrate that this simple method is feasible for synthesizing the few-layer graphene materials. Besides that, the acquired graphene is also used as the cathode material in the surface-enabled lithium ion-exchanging cell. The galvanostatic charge/discharge tests show that the graphene prepared from this method is suitable for this system and displays a satisfactory electrochemical performance. The acquired graphene sample exhibits the reversible capacities of around 187, 107, 84, 58, and 45 mAh g−1 at 0.1, 2, 5, 10, and 15 A g−1, respectively. At the current density of 0.5 A g−1, the capacity retention can reach 75 % after 2000 cycles.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1690-5
      Issue No: Vol. 22, No. 9 (2016)
       
  • Improved Li- storage performance of heat-treated InFeCoO 4 spinel prepared
           by glycine assisted chemical route
    • Authors: B. Das; M. V. Reddy; B. V. R. Chowdari
      Pages: 1585 - 1591
      Abstract: Abstract Herein, we show the synthesis of high-capacity anode, InFeCoO4 spinel for lithium ion batteries (LIBs), by facile glycine-assisted chemical approach. The structure and morphology are evaluated by X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS) and scanning electron microscopy (SEM) techniques, respectively. The pure phase formation of spinel InFeCoO4 is confirmed from XRD pattern, whereas the oxidation state of Co in 2+ is determined from XAS analysis. Electrochemical performance of InFeCoO4 in the half-cell configuration is evaluated by galvanostatic and cyclic voltammetry (CV) in the voltage window of 0.005–3.0 V vs. Li. When cycled at 60 mA g−1, it shows a high first cycle reversible capacity of 750 (±10) mA h g−1. However, slow capacity degradation is noticed upon cycling and reached 285 (±10) mA h g−1 after 40 cycles. An improved Li-storage performance is noticed under similar cycling condition, when the electrode is heat-treated. It shows first cycle reversible capacity of 880 (±10) mA h g−1 and reached 535 (±10) mA h g−1 after 40 cycles. The coulombic efficiency is >98 % during cycling. The improved Li-storage performance is possibly due to the distribution of PVDF (binder) in the active materials as well as better electrical contact after heat treatment.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1692-3
      Issue No: Vol. 22, No. 9 (2016)
       
  • V 2 O 5 -SiO 2 hybrid as anode material for aqueous rechargeable lithium
           batteries
    • Authors: Zheng Zhang; Hui Wang; Shan Ji; Bruno G. Pollet; Rongfang Wang
      Pages: 1593 - 1601
      Abstract: Abstract V2O5-SiO2 hybrid material was fabricated by heat-treating a mixture of H2SiO3 and V2O5. SEM, TEM, XRD, and N2 isotherm analyses were performed to characterize the morphology and structure details of the as-prepared V2O5-SiO2. The possibility of using the as-prepared V2O5-SiO2 as anode material for aqueous lithium-ion batteries was investigated. Potentiostatic and galvanostatic results indicated that the intercalation/de-intercalation of Li+ in this material in aqueous electrolyte was quasi-reversible. It was also found that a discharge capacity of up to 199.1 mAh g−1 was obtained at a current density of 50 mA g−1 in aqueous solution of 1 M Li2SO4, a value which is much higher than the available reported capacities of vanadium (+5) oxides in aqueous electrolytes.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1696-z
      Issue No: Vol. 22, No. 9 (2016)
       
  • Investigation on Li-ion battery charging polarization characteristics and
           influence factors
    • Authors: Fan Yang; Yanlong Qiao; Bing Gao; Pan Duan; Yan Zhu
      Pages: 1603 - 1610
      Abstract: Abstract An electrochemical-thermal Li-ion battery model considering electrochemical reactions and heat transfer was established. Firstly, polarization characteristics were analyzed in principle and polarization voltage was calculated. Then, cell voltage V and polarization voltage V p versus SOC (state of charge) at different CC (constant-current) charging rates were discussed. Thirdly, average polarization P A and cutoff SOC SOCc were proposed to quantize the polarization level and its influence on charging under different charging conditions. Finally, influence factors on battery polarization including electrolyte salt concentration, electrolyte conductivity, active material particle radius, positive electrode conductivity, and ambient temperature were studied. In addition, influence of the factors on SOCc and heat generation was investigated. The results show that polarization voltage has direct effect on cell voltage and is negatively related with charging performance and positively related with heat generation. Higher electrolyte salt concentration, positive electrode conductivity, lower electrode particle radius, and ambient temperature make for lower polarization voltage.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1694-1
      Issue No: Vol. 22, No. 9 (2016)
       
  • Influence of γ-ray-induced effects on dielectric dispersion of
           CuO-doped calcium fluoroborophosphate glass system
    • Authors: Bhogi Jai Rama Satyanarayana Swamy; Rangu Vijay; Pamidi Ramesh Babu; Bhaskar Sanyal; Yerramreddy Gandhi; Nalluri Veeraiah
      Pages: 1625 - 1634
      Abstract: Abstract γ-Ray-induced dielectric dispersion in CaF2–B2O3–P2O5 glasses doped with different concentrations of CuO was investigated. The glass samples were exposed to γ-rays with dose varying within the range 0–10 kGy. The dielectric dispersion and spectroscopic properties were measured before and after γ-ray treatment. Additionally, thermoluminescence studies were performed on post-irradiated glass samples. The results of dielectric properties and dielectric breakdown strength indicated a substantial increase in the insulating strength of CuO containing glasses due to γ-ray irradiation. The analysis of these results together with UV-vis optical absorption, IR spectra, and thermoluminescence studies have indicated a gradual increase in the concentration of mono-valent copper ions due to γ-ray treatment of the glass network. The additional studies have confirmed that these Cu+ ions occupy network-forming positions, increase the polymerization of the borophosphate glass network, and facilitates for the increase of insulating strength of the titled glass.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1671-8
      Issue No: Vol. 22, No. 9 (2016)
       
  • Investigation of transport properties of chitosan-based electrolytes
           utilizing impedance spectroscopy
    • Authors: I. A. Fadzallah; I. M. Noor; M. A. Careem; A. K. Arof
      Pages: 1635 - 1645
      Abstract: Abstract A method based on impedance spectroscopy has been utilized to obtain values of transport parameters such as number density, mobility and diffusion coefficient of mobile ions of solid polymer electrolytes (SPEs). SPE membranes consisting of chitosan and various amounts of oxalic acid (C2O4H2) from 10 to 50 wt% have been prepared by the solution casting method. The Nyquist plots of all electrolytes have been fitted using the impedance equations based on equivalent circuits, and the parameters involved have been evaluated by trial and error. Number density, mobility and diffusion coefficient of mobile ions were calculated based on the parameters obtained. The values obtained from the proposed electrical impedance spectroscopy method are in reasonable agreement with those calculated using the percentage of mobile ions obtained from Fourier transform infrared (FTIR) measurements. The results were further compared with the results obtained using broadband dielectric response or Bandara-Mellander approach. The findings were confirmed by repeating the measurements and calculations on a glycerol-chitosan-oxalic acid-based electrolyte.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1687-0
      Issue No: Vol. 22, No. 9 (2016)
       
  • The effect of LiCF 3 SO 3 on the complexation with potato starch-chitosan
           blend polymer electrolytes
    • Authors: N. N. A. Amran; N. S. A. Manan; M. F. Z. Kadir
      Pages: 1647 - 1658
      Abstract: Abstract This work examines the effect of lithium trifluoromethanesulfonate (LiCF3SO3) and glycerol on the conductivity and dielectric properties of potato starch-chitosan blend-based electrolytes. The electrolytes are prepared via solution cast technique. From X-ray diffraction (XRD) analysis, the blend of 50 wt.% starch and 50 wt.% chitosan is found to be the most amorphous blend. Fourier transform infrared (FTIR) spectroscopy studies show the interaction between the electrolyte materials. The room temperature conductivity of pure starch-chitosan film is found to be (2.85 ± 1.31) × 10−10 S cm−1. The incorporation of 45 wt.% LiCF3SO3 increases the conductivity to (7.65 ± 2.27) × 10−5 S cm−1. Further conductivity enhancement up to (1.32 ± 0.35) × 10−3 S cm−1 has been observed on addition of 30 wt.% glycerol. This trend in conductivity is verified by XRD and dielectric analysis. The temperature dependence of conductivity of all electrolytes are Arrhenian.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1684-3
      Issue No: Vol. 22, No. 9 (2016)
       
  • Understanding the sintering temperature effect on oxygen ion conductivity
           in doped ceria electrolytes
    • Authors: Lili Guan; Shiru Le; David Rooney; Naiqing Zhang; Xiaodong Zhu; Kening Sun
      Pages: 1699 - 1708
      Abstract: Abstract Achieving a high electrical conductivity with a low sintering temperature is an important goal in the development of solid oxide fuel cell electrolytes. Herein, nanoscale doped ceria materials Ce0.9Gd0.1-x Bi x O1.95 (x = 0 and 0.02–0.05) were prepared by the coprecipitation method for this purpose. Impedance spectroscopy analyses performed at 250 and 400 °C was employed to calculate sample’s electrical conductivity, which were sintered at various temperatures. The electrical conductivity was observed to decrease with increasing sintering temperature. The optimal sintering temperature of Ce0.9Gd0.08Bi0.02O1.95 and Ce0.9Gd0.1O1.95 was 1300 and 1400 °C, respectively. The material Ce0.9Gd0.08Bi0.02O1.95 presented an electrical conductivity of 8.1 × 10−4 S cm−1 at 400 °C, i.e., four times that of GDC (x = 0) sintered at 1400 °C (2.0 × 10−4 S cm−1 at 400 °C). It is believed that these effects results from the Schottky barrier height and oxygen vacancy concentration within the space charge layer changing with sintering temperature. This oxygen vacancy depletion in the space charge layer is also believed to account for the oversintering effect.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1695-0
      Issue No: Vol. 22, No. 9 (2016)
       
  • Investigation about electrocatalytic oxidation of glucose on loaded Ag
           nanoparticles on functionalized carbon nanotubes
    • Authors: Mehdi Baghayeri; Amirhassan Amiri; Aniseh Motamedifar
      Pages: 1709 - 1717
      Abstract: Abstract Silver nanoparticle-modified glassy carbon electrode was prepared by electrodeposition forming silver nanoparticles on functionalized multiwall carbon nanotubes (MWCNT) matrix. The electrooxidation of glucose in 0.1 M NaOH was studied by using cyclic voltammetry. The transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images showed that the used functionalized MWCNT-base is favorable for the construction of a stable layer on the surface of modified electrode. The electrode has surface-confined nanoparticles showing effective catalytic behavior in the studies of glucose oxidation. Investigations showed at the first glucose was catalytically oxidized by AgO, and then, the reaction glucose oxidation intermediates with Ag2O were followed stepwisely. Based on the obtained cyclic voltammetric results, differential pulsed voltammetry was used for detection of glucose.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1689-y
      Issue No: Vol. 22, No. 9 (2016)
       
  • Energy storage performance of hybrid aqueous supercapacitor based on
           nano-Li 2 MnSiO 4 and activated carbon
    • Authors: Prerna Chaturvedi; Anjan Sil; Yogesh Sharma
      Pages: 1719 - 1728
      Abstract: Abstract Novel asymmetric supercapacitor (ASC) composed of nanocrystalline Li2MnSiO4 (LMS) and activated carbon (AC) in aqueous electrolyte is investigated. ASC is tested in three different electrolytes, viz. 2 M KOH, 2 M LiOH, and 2 M Li2SO4. The aqueous solution of 2 M KOH is found to be an appropriate electrolyte in terms of better capacitance, cyclability, and rate capability probably due to a smaller hydration sphere radius and larger ionic conductivity of K+ ions. The electrochemical performance of ASC is examined using cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) cycling, and results are complimented with electrochemical impedance spectroscopy (EIS). Novel ASC exhibits the specific capacitance of 60 (±5) F g−1 at 3 mV s−1 in 2 M KOH. The excellent cyclability (till 5000 cycles) is also observed. The improved supercapacitive properties are mainly ascribed to the unique morphology of LMS (surface area ∼30 m2 g−1 and homogenous meso-pore distribution) which provides easy percolation of electrolytic ions to provide better formation of electric double layer with minor redox behavior. The ex situ X-ray diffraction (XRD) measurement was carried out on a cycled electrode to support the plausible reaction mechanism.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1683-4
      Issue No: Vol. 22, No. 9 (2016)
       
  • Supercapacitor studies of electrochemically synthesized multi-layered
           polyaniline on stainless steel substrate
    • Authors: Sowmya; Y.N. Sudhakar; M. Selvakumar
      Pages: 1729 - 1739
      Abstract: The multi-layered electrodeposition of polyaniline on stainless steel substrate was carried out using three electrochemical techniques such as potentiodynamic (PD), potentiostatic (PS), galvanostatic (GS) and three different dopants such as sulphuric acid (SA), p-toluene sulphonic acid (PTSA) and camphor-10-sulphonic acid (CSA). The structural properties of multi-layered polymer films were analysed by SEM, AFM and FTIR. The electrochemical properties of multi-layered films were analysed by cyclic voltammetry and AC impedance spectroscopy. The results showed that the highest specific capacitance of 468 F/g was obtained for those multi-layered electrode materials developed using potentiodynamic method. As per the highest specific capacitance value, potentiodynamic method was chosen for multi-layer deposition of polyaniline. Symmetrical supercapacitors were fabricated using multi-layered polyaniline, and the supercapacitive properties were analysed by galvanostatic charge-discharge technique. Graphical abstract ᅟ
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1705-2
      Issue No: Vol. 22, No. 9 (2016)
       
  • Polymeric Co(salen) scaffold for the electrochemical determination of
           acetaminophen in pharmaceutical sample
    • Authors: Piyush Kumar Sonkar; Vellaichamy Ganesan; Abhilasha Prajapati
      Pages: 1741 - 1749
      Abstract: Abstract A polymeric Co(salen) (where salen = N,N′-bis(salicylidene)ethylenediamine) electrochemical sensing scaffold was prepared by electropolymerization of Co(salen) on glassy carbon (GC) electrode employing potentiodynamic method. The sensing scaffold, represented as GC/poly[CoII-S], has notable activity toward the electrochemical oxidation of acetaminophen in 0.1 M pH 7.0 phosphate buffer solution. Polymeric films with porous or net-like structures are normally expected to function as excellent platforms for electrochemical reactions. Accordingly in the present study, GC/poly[CoII-S] scaffold displays a perfect linear relationship for acetaminophen determination in the range of 0.5 to 5000 μM. The sensitivity and detection limit are calculated as 71 μA mM−1 and 0.3 μM, respectively. This new sensing scaffold displays high stability for more than 40 days. The reproducibility is measured based on the response of different scaffolds for 12 experiments which shows a relative standard deviation of 3.9 %. Further, GC/poly[CoII-S] is successfully applied for acetaminophen determination in a real sample.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1699-9
      Issue No: Vol. 22, No. 9 (2016)
       
  • Proton diffusion process manganese dioxide for use in rechargeable
           alkaline zinc manganese dioxide batteries and its electrochemical
           performance
    • Authors: Louiza Ouksel; Rachida Kerkour; Nacer Eddine Chelali
      Pages: 1751 - 1757
      Abstract: Abstract The aim of the present work is the study of the performances of dry cells containing the electrolytic MnO2, natural MnO2, or a mixture of both. The two components have been characterized by chemical analysis. The continuous discharge tests done on the dry cells based on EMD present a discharge time largely greater than that of the pure NMD; however, the cells containing a mixture present intermediate values of the discharge time. The value of the diffusion coefficient estimated by the GITT or impedance spectroscopy shows that the H+ diffuses more quickly in the EMD variety that in the NMD one.
      PubDate: 2016-09-01
      DOI: 10.1007/s11581-016-1760-8
      Issue No: Vol. 22, No. 9 (2016)
       
 
 
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