A novel silsesquioxanes modified electrospun composite fibrous separator by in-situ crosslinking method for lithium-ion batteries

被引:11
作者
Gui, Xuefeng [1 ,2 ]
Liu, Lingli [1 ,2 ]
Gao, Shuxi [1 ,2 ]
Sun, Longfeng [1 ,2 ]
Xu, Kai [1 ]
Chen, Mingcai [1 ]
机构
[1] Chinese Acad Sci, Guangzhou Inst Chem, Guangdong Prov Key Lab Organ Polymer Mat Elect, POB 1122, Guangzhou 510650, Guangdong, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
关键词
Polymeric composites; Fiber technology; Silsesquioxane; Polymer separator; Lithium-ion batteries; MEMBRANES;
D O I
10.1016/j.matlet.2019.01.104
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Microporous electrospun PVDF-HFP nonwoven separators have advantages of higher porosities and better wettabilities compared with conventional polyolefin, but suffer from low mechanical strength and excessive swelling in electrolyte. To enhance the mechanical properties, thermal and dimensional stabilities as well as electrochemical performance of electrospun separators, cross-linked membranes covalently integrated with hybrid silsesquioxane components were fabricated by in-situ crosslinking method, obtaining armor-like shell structure coated on PVDF-HFP fibers. The silsesquioxanes crosslinked PVDF-HFP fibers separator (SQ-PFF) exhibits excellent tensile and puncture strength, superior thermal and dimensional stabilities. Besides, the SQ-PFF prepared cells revealed remarkable discharge capacity and excellent cycling performance ascribing to the high lithium-ion conductivity and the enhanced cross-linked structure. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页码:66 / 70
页数:5
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