An investigation of polypyrrole-LiV3O8 composite cathode materials for lithium-ion batteries

被引：69
作者：
Feng, C. Q. [1 ,3 ]
Chew, S. Y. [1 ,2 ]
Guo, Z. P. [1 ,2 ]
Wang, J. Z. [1 ,2 ]
Liu, H. K. [1 ,2 ]
机构：
[1] Univ Wollongong, Inst Superconduct Elect Mat, Wollongong, NSW 2522, Australia
[2] Univ Wollongong, ARC Ctr Excellence Electromat Sci, Wollongong, NSW 2522, Australia
[3] Hubei Univ, Fac Chem & Mat Sci, Wuhan 430062, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2007年 / 174卷 / 02期
基金：
澳大利亚研究理事会;
关键词：
LiV3O8; polypyrrole; lithium-ion battery; cyclability;
D O I：
10.1016/j.jpowsour.2007.06.190
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel lithium trivanadate/polypyrrole (LiV3O8-PPy) composite, suitable for lithium-ion battery cathodes, was synthesized by dispersing LiV3O8 and PPy powders in ethanol followed by heating. The polypyrrole acts as a conducting matrix, a binder and an active material, as well as a volume change buffer agent, which holds the LiV3O8 particles in place during the charge/discharge cycles. The new material was characterized by scanning electron microscopy. It was found that polypyrrole particles were uniformly distributed among the LiV3O8 powders, which could significantly enhance the electrical conductivity and stability of the composite electrode. The composite containing 20wt% PPy exhibits a good reversibility, higher coulombic efficiency and better cycle life than the bare LiV3O8 electrode. (c) 2007 Published by Elsevier B.V.
引用
收藏
页码：1095 / 1099
页数：5
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