A Nacre-Inspired Separator Coating for Impact-Tolerant Lithium Batteries

被引：153

作者：

Song, Yong-Hui ^{[1
,2
]}

Wu, Kai-Jin ^{[3
]}

Zhang, Tian-Wen ^{[1
]}

Lu, Lei-Lei ^{[1
,2
]}

Guan, Yong ^{[4
]}

Zhou, Fei ^{[1
,2
]}

Wang, Xiu-Xia ^{[5
]}

Yin, Yi-Chen ^{[1
,2
]}

Tan, Yi-Hong ^{[1
,2
]}

Li, Feng ^{[1
]}

Tian, Te ^{[1
]}

Ni, Yong ^{[3
]}

Yao, Hong-Bin ^{[1
,2
]}

Yu, Shu-Hong ^{[1
,2
,6
]}

机构：

[1] Univ Sci & Technol China, Div Nanomat & Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Chem, Dept Appl Chem, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, Dept Modern Mech, CAS Key Lab Mech Behav & Design Mat, CAS Ctr Excellence Complex Syst Mech, Hefei 230027, Anhui, Peoples R China

[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China

[5] Univ Sci & Technol China, Ctr Micro & Nanoscale Res & Fabricat, Hefei 230026, Anhui, Peoples R China

[6] Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Hefei 230026, Anhui, Peoples R China

来源：

ADVANCED MATERIALS | 2019年 / 31卷 / 51期

基金：

中国国家自然科学基金;

关键词：

impact tolerance; nacre-inspired coating; porous aragonite platelets; safety; short circuit;

D O I：

10.1002/adma.201905711

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

The commercial ceramic nanoparticle coated microporous polyolefin separators used in lithium batteries are still vulnerable under external impact, which may cause short circuits and consequently severe safety threats, because the protective ceramic nanoparticle coating layers on the separators are intrinsically brittle. Here, a nacre-inspired coating on the separator to improve the impact tolerance of lithium batteries is reported. Instead of a random structured ceramic nanoparticle layer, ion-conductive porous multilayers consisting of highly oriented aragonite platelets are coated on the separator. The nacre-inspired coating can sustain external impact by turning the violent localized stress into lower and more uniform stress due to the platelet sliding. A lithium-metal pouch cell using the aragonite platelet coated separator exhibits good cycling stability under external shock, which is in sharp contrast to the fast short circuit of a lithium-metal pouch cell using a commercial ceramic nanoparticle coated separator.

引用

页数：7

共 27 条

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