A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries

doi:10.3390/polym10121409

CORC > 金属研究所 > 中国科学院金属研究所

	A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries
	Zhang, Kaiyue 1,2; Xiao, Wei 1,2; Liu, Jianguo 1,2; Yan, Chuanwei 1,2
刊名	POLYMERS
	2018-12-01
卷号	10 期号:12 页码:13
关键词	self-binding coating poly(tetrafluoroethylene) poly(ethylene) separator cell performance Li-ion battery
ISSN号	2073-4360
DOI	10.3390/polym10121409
通讯作者	Xiao, Wei(wxiao@imr.ac.cn)
英文摘要	In this study, a novel composite separator based on polytetrafluoroethylene (PTFE) coating layers and a commercial polyethylene (PE) separator is developed for high performance Li-ion batteries. This composite separator is prepared by immersing a PE separator directly into a commercial PTFE suspension to obtain a self-binding PTFE/PE/PTFE tri-layered structure. Then, the as-prepared composite separator is further treated with a H2O2/H2SO4 solution to enhance its electrolyte affinity. The results show that the coating layer, consisting of close-packed PTFE particles, possesses a highly ordered nano-porous structure and an excellent electrolyte wettability property, which significantly enhance the ionic conductivity of the composite separator. Due to the presence of the PTFE-based coating layer, the composite separator exhibits better thermal stability compared with the PE separator, reaching the thermal-resistant grade of commercial ceramic-coated separators. By using different separators, CR2032-type unit half-cells composed of a Li anode and a LiFePO4 cathode were assembled, and their C-rate and cycling performances were evaluated. The cell assembled with the composite separator was proven to have better C-rate capability and cycling capacity retention than the cell with the polyethylene separator. It is expected that the composite separator can be a potential candidate as a coating-type separator for high-performance rechargeable Li-ion batteries.
资助项目	National Natural Science Foundation of China[21676282] ; Natural Science Foundation of Liaoning[20180510039] ; Shenyang Science and Technology Project[18013051]
WOS研究方向	Polymer Science
语种	英语
出版者	MDPI
WOS记录号	WOS:000454748700117
资助机构	National Natural Science Foundation of China ; Natural Science Foundation of Liaoning ; Shenyang Science and Technology Project
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/130961]
专题	金属研究所_中国科学院金属研究所
通讯作者	Xiao, Wei
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Kaiyue,Xiao, Wei,Liu, Jianguo,et al. A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries[J]. POLYMERS,2018,10(12):13.
APA	Zhang, Kaiyue,Xiao, Wei,Liu, Jianguo,&Yan, Chuanwei.(2018).A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries.POLYMERS,10(12),13.
MLA	Zhang, Kaiyue,et al."A Novel Self-Binding Composite Separator Based on Poly(tetrafluoroethylene) Coating for Li-Ion Batteries".POLYMERS 10.12(2018):13.