天津工业大学学报Issue(1)：15-19,5.
聚酰亚胺静电纺隔膜的电化学性能
Electrochemical properties of electrospun polyimide membrane for lithium ion battery
摘要
Abstract
The thermosetting polyimide (PI) nano-fibers based nonwoven membrane is prepared by electrospinning technique and followed by thermal imidization. The physical and mechanical properties of PI nano-fibers based nonwoven separators are tested and the electrochemical performance of the PI membrane for lithium ion battery at different charge cut-off voltage (herein, common voltage 4.2 V and higher 4.4 V) is investigated. The results show that the average diameter of PI nano-fibers is as fine as 276 nm; the porosity of PI nano-fibers based nonwoven separators is up to 92% and they exhibit better wettability for the polar electrolyte compared to the commercial Celgard 2400 membrane; After 50 cycles at 0.2C/0.2C charge and discharge rate, the capacity retention ratio of the cell assembled with PI nano-fibers based nonwoven separators at both voltage range is higher than 80%, especially that of 4.4 V charge is up to 91.6%, which are obviously superior to commercial Celgard 2400 membrane; moreover, the special capacity of PI separators fades slower than Celgard 2400 membrane with the increase of discharge rate at both situation.关键词
静电纺/聚酰亚胺/纳米纤维/锂电隔膜/电化学性能Key words
electrospinning/polyimide/nano-fibers/membrane for lithium ion battery/electrochemical properties分类
轻工纺织引用本文复制引用
周近惠,焦晓宁,康卫民..聚酰亚胺静电纺隔膜的电化学性能[J].天津工业大学学报,2014,(1):15-19,5.基金项目
国家自然科学基金项目 （）
