Electrochemical characterization of a LiV3O8-polypyrrole composite as a cathode material for lithium ion batteries

被引：34
|
作者：
Tian, Fanghua [1 ]
Liu, Li [1 ,2 ]
Yang, Zhenhua [1 ,2 ]
Wang, Xingyan [1 ]
Chen, Quanqi [1 ]
Wang, Xianyou [1 ]
机构：
[1] Xiangtan Univ, Sch Chem, Minist Educ,Key Lab Mat Design & Preparat Technol, Key Lab Environmen Friendly Chem & Applicat, Xiangtan 411105, Peoples R China
[2] Xiangtan Univ, Fac Mareials Optoelect & Phys, Xiangtan 411105, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 127卷 / 1-2期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
LiV3O8-PPy composite; Cathode materials; Lithium ion batteries; Electrochemical properties; LIV3O8; PERFORMANCE; STATE; IMPROVEMENT; LI1+XV3O8; INSERTION; OXIDE;
D O I：
10.1016/j.matchemphys.2011.01.051
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
LiV3O8-Polypyrrole (LiV3O8-PPy) composite has been chemically synthesized by an oxidative polymerization of pyrrole monomer on the surface of LiV3O8 using ferric chloride as oxidizing agent. The electrochemical properties of LiV3O8-PPy composite were systematically investigated using a variety of electrochernical methods. The LiV3O8-PPy composite electrode exhibited better cycling behavior and superior rate capability as compared with the bare LiV3O8 electrode. Cyclic voltammetry corroborated the galvanostatic cycling tests, with the composite cathode material showing better reversibility than bare material. Finally, fitting the impedance results to an equivalent circuit indicated that the enhanced electrochemical performances of LiV3O8-PPy composite resulted from a facilitated kinetics of interfacial charge transfer in the presence of PPy. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：151 / 155
页数：5
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