Improvement of cycle performance of lithium ion cell LiMn2O4/LixV2O5 with aqueous solution electrolyte by polypyrrole coating on anode

被引：126
作者：
Wang, Haibo
Zeng, Yuqun
Huang, Kelong
Liu, Suqin
Chen, Liquan
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
[2] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China
[3] Amperex Technol Ltd, Dongguan 523080, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2007年 / 52卷 / 15期
关键词：
lithium ion battery; aqueous solution electrolyte; surface coating; polypyrrole; cycle performance; anode;
D O I：
10.1016/j.electacta.2007.02.004
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The reasons of capacity fading during cycling process of LiMn2O4/LixV2O5 lithium ion cell with 5M LiNO3 aqueous solution as electrolyte were investigated. XRD and ICP results showed that the properties of the anode have more impact on the cycle life of the cell. In an attempt to improve the cycle performance of the as-assembled cell, coating with an ionic conductive polypyrrole (PPy) on the surface of the anode was proposed via in situ polymerization method. Cycling tests revealed that the stability of the lithium ion cell with surface coated anode has been greatly improved. Moreover, the capability of the cell with coated anode was also enhanced compared with the cell with bare anode. (c) 2007 Elsevier Ltd. All rights reserved.
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页码：5102 / 5107
页数：6
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