不同温度循环过程中PE基隔膜和PP基隔膜的力学性能和电化学性能变化  

Research on the Changes of Mechanical and Electrochemical Characteristics of PP and PE Separators in Whole Battery Cycle Life

作　　者：李治中[1] 哈立原[1] LI Zhizhong HA Liyuan(Department of Information Technology and Engineering, Xilingol Vocational College, Xilinhot 026000, Inner Mongoli)

机构地区：[1]锡林郭勒职业学院信息技术工程系,内蒙古锡林浩特026000

出　　处：《四川师范大学学报（自然科学版）》2017年第5期680-685,共6页Journal of Sichuan Normal University（Natural Science）

基　　金：内蒙古少数民族非物质文化遗产传承与创新研究项目(2016ZID037)

摘　　要：为了选择合适的锂离子电池内部隔膜的基材,深入理解采用PE和PP基材料制作隔膜的力学以及电化学特性,基于试验法对PP和PE基薄膜进行了对比研究,结果表明此2种隔膜基础材料均具有极强的耐腐蚀性,在锂离子电池进行充放电工作循环过程中,导致其力学性大幅下降的因素为拉断力产生的蠕变以及疲劳积累.试验结果亦表明:2种基材隔膜的阻抗随着循环的持续时间的增加而增加,并且PP基材制得的隔膜阻抗较之PE基材制得的隔膜阻抗大,最终得到影响锂离子电池内部阻力增加受基材阻抗变化的影响不大.In order to provide useful information for the selection of substrates （ PP or PE）, it is necessary to find out the mechani- cal and electrochemical characteristics. Based on the experimental method, the PP and PE substrates are comparatively studied. The result shows that it has more advantages in high corrosion resistance, the factors leading to decline sharply are creep and cumulative fa- tigue in the process of the lithium ion battery charge and discharge, and the impedances of PP substrates are bigger than PE substrates. Finally, it validates resistance doesn＇ t increased with impedances of substrates increased.

关 键 词：基材 力学性能 隔膜阻抗 电化学性能 

分 类 号：TS171[轻工技术与工程—纺织材料与纺织品设计]