文献类型：期刊文献

英文题名：Electrochemical study of P(VDF-HFP)/PMMA blended polymer electrolyte with high-temperature stability for polymer lithium secondary batteries

作者：Liu, L. L.[1];Li, Z. H.[1];Xia, Q. L.[1];Xiao, Q. Z.[1];Lei, G. T.[1];Zhou, X. D.[2]

机构：[1]Xiangtan Univ, Coll Chem, Minist Educ, Key Lab Environm Friendly Chem & Applicat, Xiangtan 411105, Peoples R China;[2]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：18

期号：3

起止页码：275

外文期刊名：IONICS

收录：;EI(收录号：20121014833460);WOS:【SCI-EXPANDED(收录号:WOS:000300676400005)】；

基金：Financial support from the Natural Science Foundation of China (21174119), the Hunan Provincial Natural Science Foundation (09JJ5008), and the Open Fund from State Key Laboratory of Chemical Engineering in East China University of Science and Technology (SKL-ChE-08 C06), respectively, are acknowledged. The authors also thank Dr. Y H. Ding for his help in the EIS measurements.

语种：英文

外文关键词：Polymer electrolytes; Electrochemical characterizations; Ionic conductivities; Lithium batteries

摘要：In the present study, a kind of solid polymer electrolyte (SPE) based on poly(vinylidene difluoride-co-hexafluoropropylene)/poly(methyl methacrylate) blends was prepared by a casting method to solve the safety problem of lithium secondary batteries. Owing to being plasticized with a room temperature ionic liquid, N-butyl-N'-methyl-imidiazolium hexafluorophosphate, the obtained SPE shows a thermal decomposition temperature over 300A degrees C and an ionic conductivity close to 10(-3) S cm(-1). The SPE-3 sample, in which the weight of two polymers is equivalent, possesses an ionic conductivity of 0.45 x 10(-3) S cm(-1) at 25A degrees C and presents an electrochemical window of 4.43 V. The ionic conductivity of the SPE-3 is as high as 1.73 x 10(-3) S cm(-1) at 75A degrees C approaching to that of liquid electrolyte. The electrochemical performances of the Li/LiFePO4 cells confirmed its feasibility in lithium secondary batteries.