Enhanced Wettability of a PTFE Porous Membrane for a High-Temperature Stable Lithium-Ion Battery Separator

被引：10

作者：

Guo, Hongxia ^{[1
]}

Li, Mingye ^{[1
]}

Li, Fan ^{[2
]}

Zhu, Qizhen ^{[3
]}

Zhao, Yao ^{[1
]}

Wang, Feng ^{[2
]}

Qin, Zhenping ^{[2
]}

机构：

[1] Beijing Univ Technol, Fac Mat & Mfg, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China

[2] Beijing Univ Technol, Fac Environm & Life, Nanmofang St,Pingleyuan 100, Beijing 100124, Peoples R China

[3] Beijing Univ Chem Technol, Beijing Key Lab Electrochem Proc & Technol Mat, State Key Lab Organ Inorgan Composites, Beisanhuan East Rd 15, Beijing 100029, Peoples R China

来源：

CHEMICAL ENGINEERING & TECHNOLOGY | 2022年 / 45卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Electrochemical performance; Li-ion battery separator; Poly(tetrafluoroethylene) membrane; Wettability; ELECTROCHEMICAL PERFORMANCE; POLYPROPYLENE SEPARATORS; SURFACE MODIFICATION; THERMAL-STABILITY; ELECTROLYTE; CHALLENGES; THIN;

D O I：

10.1002/ceat.202000218

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A hydrophobic poly(tetrafluoroethylene) (PTFE) porous membrane was modified into a hydrophilic lithium-ion battery (LIB) separator with a higher affinity to the electrolyte via the hybrid consisting of a cationic fluorocarbon surfactant (FCS), polyethylenimine (PEI), and tetraethyl orthosilicate (TEOS), which can be in-situ biomineralized into SiO2 nanoparticles. The obtained PTFE/FCS-PEI-SiO2 separator showed a dynamic electrolyte contact angle, which decreased from 50.3 degrees to 0 degrees within 4 s, along with 215 % of electrolyte uptake. The ionic conductivity and the interfacial resistance were 9.12 mS cm(-1) and 228.8 omega, respectively. In addition, the cell equipped with the separator showed a capacity of 163.7 mAh g(-1) at a current density of 0.2 C. Notably, the cell with the separator displayed good high-temperature stability.

引用

页码：737 / 744

页数：8

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