Free-standing V2O5 electrode for flexible lithium ion batteries

被引：89

作者：

Seng, Kuok Hau ^{[1
,2
]}

Liu, Jun ^{[1
]}

Guo, Zai Ping ^{[1
,2
]}

Chen, Zhi Xin ^{[2
]}

Jia, Dianzeng ^{[3
]}

Liu, Hua Kun ^{[1
]}

机构：

[1] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[2] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

[3] Xinjiang Univ, Inst Appl Chem, Urumqi 830046, Peoples R China

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2011年 / 13卷 / 05期

基金：

澳大利亚研究理事会;

关键词：

Vanadium pentoxide; Free-standing; Flexible; Lithium ion batteries; Carbon nanotubes; PAPER; CATHODES; ANODE;

D O I：

10.1016/j.elecom.2010.12.002

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Free-standing and flexible V2O5 films have been prepared by the filtration of ultra-long nanowires synthesized through the hydrothermal technique. In order to improve the conductivity of the films, multiwalled carbon nanotubes (MWCNTs) were added to the V2O5 nanowires to form an integrated web-like structure. The structure of the V2O5 nanowires was investigated with X-ray diffraction and transmission electron microscopy. The possible use of these films as a cathode for lithium ion batteries was also investigated. The free-standing and flexible film electrodes exhibited good rate capability and excellent cycling performance, with a capacity of 140 mAh/g, even after 50 cycles at 1.7 degrees C in a voltage range of 2.5-4.0 V. The superior reversible lithium storage capability can be attributed to the fully reversible phase transitions of alpha-V2O5 through to delta-LiV2O5, good lithium diffusion in V2O5, and increased electronic conductivity and electrolyte diffusion from the incorporated MWCNT web. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：383 / 386

页数：4

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