Preparation and electrochemical performance of gel polymer electrolytes with a novel star network

被引：12
作者：
Xiao, Qizhen [1 ,2 ]
Li, Zhaohui [1 ]
Gao, Deshu [1 ]
He, Tao [1 ,2 ]
Zhang, Hailiang [1 ,2 ]
机构：
[1] Xiangtan Univ, Coll Chem, Xiangtan 411105, Peoples R China
[2] Xiangtan Univ, Inst Polymer Sci, Xiangtan 411105, Peoples R China
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 02期
关键词：
Gel polymer electrolytes; Star shaped polymers; alpha-Cyclodextrin; Lithium ion polymer battery; IONIC-CONDUCTIVITY; MEMBRANE;
D O I：
10.1007/s10800-008-9663-7
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Well-defined star shaped polymers with alpha-Cyclodextrin (alpha-CD) core linking PMMA-block arms were synthesized by atom transfer radical polymerization (ATRP). Gel polymer electrolytes (GPEs) were prepared by encapsulating electrolyte solution of 1 mol L-1 of LiClO4/EC-PC (volume 1:1) into the obtained star shaped polymer host. The ionic conductivity of the GPEs and the cycling characteristics of LiCoO2/GPEs/Graphite cell were studied by electrochemical impedance spectroscopy and charge-discharge testing, respectively. The results indicate that the GPEs have a high ionic conductivity up to 1.63 x 10(-3) S cm(-1) at room temperature and exhibit a high electrochemical stability potential of 4.5 V (vs. Li/Li+). The discharge capacity of LiCoO2/GPEs/Graphite cell is about 98% of its initial discharge capacity after 20 cycles at 0.1 C rate. Discharge capacity of the model cell with GPEs is stable with charge-discharge cycling.
引用
收藏
页码：247 / 251
页数：5
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