Energy storage studies of bare and doped vanadium pentoxide, (V1.95M0.05)O5, M = Nb, Ta, for lithium ion batteries

被引：123

作者：

Sakunthala, A. ^{[1
,2
]}

Reddy, M. V. ^{[1
]}

Selvasekarapandian, S. ^{[2
,3
]}

Chowdari, B. V. R. ^{[1
]}

Selvin, P. Christopher ^{[4
]}

机构：

[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[2] Bharathiar Univ, Ctr Life Sci, DRDO BU, Coimbatore 641046, Tamil Nadu, India

[3] Kalasalingam Univ, Virudunagar 626190, Tamil Nadu, India

[4] NGM Coll, Pollachi, Tamil Nadu, India

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2011年 / 4卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

X-RAY-ABSORPTION; V2O5; THIN-FILMS; OF-THE-ART; ELECTROCHEMICAL PROPERTIES; ELECTRODE MATERIALS; CATHODE MATERIALS; MOLTEN-SALT; SECONDARY BATTERIES; HIGH-PERFORMANCE; INTERCALATION;

D O I：

10.1039/c0ee00513d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The bare V2O5 and doped (V1.95M0.05)O-5 (M = Nb, Ta) nano/submicron sized compounds were prepared by the simple polymer precursor method. The compounds were characterized by different physical and electroanalytical techniques. The effects of doping and different synthesis conditions on the energy storage performance of the V2O5 compounds were discussed. All compounds delivered a discharge capacity (at the end of the 2(nd) cycle) in the range 245 to 261 (+/- 3) mA h g(-1), except for the tantalum doped compound (V1.95Ta0.05)O-5 which exhibited a discharge capacity of 210 (+/- 3) mA h g(-1), cycled in the range 2.0-4.0 V at a current rate of 120 mA g(-1). An excellent cycling stability of 96% till twenty cycles was achieved for the compound V2O5 prepared by the polymer precursor method. Electrochemical impedance spectroscopy studies at different voltages during discharge and charge cycles were discussed in detail.

引用

页码：1712 / 1725

页数：14

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