Highly thermostable expanded polytetrafluoroethylene separator with mussel-inspired silica coating for advanced Li-ion batteries

doi:10.1016/j.jpowsour.2020.228403

IMR OpenIR

	Highly thermostable expanded polytetrafluoroethylene separator with mussel-inspired silica coating for advanced Li-ion batteries
	Zhang, Kaiyue 1,2; Xiao, Wei 1,3; Li, Xiangrong 1; Liu, Jianguo 1,2; Yan, Chuanwei 1,2
通讯作者	Xiao, Wei(wxiao@imr.ac.cn)
	2020-08-31
发表期刊	JOURNAL OF POWER SOURCES
ISSN	0378-7753
卷号	468 页码:10
摘要	The separator as an important component in Li-ion batteries faces increasing challenges with the next-generation batteries towards higher energy density and longer life. An urgent task is to simultaneously achieve fire resistance, high thermal stability and electrolyte affinity for polymeric separators. Herein, to address all these needs, we report a mussel-inspired silica-coated expanded polytetrafluoroethylene separator fabricated by a multi-step synthesis process of dopamine self-polymerization and subsequent silica in-situ self-assembly. The separator inherits the advantages of expanded polytetrafluoroethylene matrix in terms of significant fire resistance and unique porous structure, especially exhibiting superior thermal dimensional stability up to 300 degrees C. Additionally, the polydopamine layer acts as a double-sided tape sticking expanded polytetrafluoroethylene matrix and silica layer without any polymeric binders avoiding excessive pore blocking. More significantly, the in-situ grown silica layer combined with the polydopamine layer completely solves the Achilles' heel of polytetrafluoroethylene material to endow the separators with excellent electrolyte affinity. Benefiting from such structural uniqueness, the LiFePO4 half-cell assembled with the separator shows an enhanced discharge capacity of 157.1 mA h g(-1) at 0.2C and C-rate capacity of 115.6 mA h g(-1) at 5C. Therefore, this study provides inspiration for the expanded polytetrafluoroethylene-based separators facing the next-generation Li-ion batteries.
关键词	Expanded polytetrafluoroethylene Dopamine Silica Li-ion battery separator Thermal stability
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Liaoning ; Shenyang Science and Technology Project
DOI	10.1016/j.jpowsour.2020.228403
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[21676282] ; National Natural Science Foundation of China[21805290] ; Natural Science Foundation of Liaoning[20180510039] ; Shenyang Science and Technology Project[18013051]
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
WOS类目	Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号	WOS:000543021900032
出版者	ELSEVIER
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/139447
专题	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, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Liaoning Shihua Univ, Chem Engn & Environm Sci, Fushun 113001, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Kaiyue,Xiao, Wei,Li, Xiangrong,et al. Highly thermostable expanded polytetrafluoroethylene separator with mussel-inspired silica coating for advanced Li-ion batteries[J]. JOURNAL OF POWER SOURCES,2020,468:10.
APA	Zhang, Kaiyue,Xiao, Wei,Li, Xiangrong,Liu, Jianguo,&Yan, Chuanwei.(2020).Highly thermostable expanded polytetrafluoroethylene separator with mussel-inspired silica coating for advanced Li-ion batteries.JOURNAL OF POWER SOURCES,468,10.
MLA	Zhang, Kaiyue,et al."Highly thermostable expanded polytetrafluoroethylene separator with mussel-inspired silica coating for advanced Li-ion batteries".JOURNAL OF POWER SOURCES 468(2020):10.