Polyimide matrix enhanced cross-linked gel separator with three-dimensional heat-resistance skeleton for high safety and high power lithium ion battery
To develop a kind of gel polymer electrolyte with high ion conductivity, good mechanical strength and thermal stability, polyimide (PI) matrix enhanced cross-linked gel separator is designed and fabricated by a simple dip-coating and heat treatment method.The PI nonwoven substrate provides high-temperature thermal stability for the gel separator and the crosslinked gel part yields enhanced affinity with liquid electrolyte.Besides, the cross-linked polymer network could solve the limitation of long-term durability of the composite separator in battery.The gel separator shows better cyclability and rate capability than the traditional PP separator, implying a promising potential application in high power high safety lithium ion batteries.The preparation process is compatible with the traditional manufacture process of the nonwoven membrane and is easily converted to continuously produce on industrial scale.
lithium ion battery separator heat-resistance cross-link
Junli Shi Huasheng Hu Yonggao Xia Yuanzhuang Liu Zhaoping Liu
Ningbo Institute of Materials Technology Engineering (NIMTE), Chinese Academy of Sciences,Zhejiang, P.R.China, 31520
国内会议
宁波
英文
722-741
2014-11-11（万方平台首次上网日期，不代表论文的发表时间）