Characterization of the Separator with Thermal-Shutdown Layer for Use in Lithium Batteries

Authors

Li BAI, China Aviation Lithium Battery Co., Ltd., Luoyang 471003, Henan, China;
Yong-jian HUAI, China Aviation Lithium Battery Co., Ltd., Luoyang 471003, Henan, China;Follow
Xin-ping AI, Department of Chemistry, Wuhan University, Wuhan 430072, Hubei, China;
Hai JIA, China Aviation Lithium Battery Co., Ltd., Luoyang 471003, Henan, China;

Corresponding Author

Yong-jian HUAI(huaiyongjian@126.com)

Abstract

In this paper, the lithium ion battery coated with the thermal-shutdown functional layer has been introduced. The shutdown temperature of the separator could be decreased by using the melting point of thermal-shutdown functional layer. When the internal battery environment reached a critical temperature, the functional layer melted and coated the anode/separator with a non-conductive barrier, halting Li-ion transport and shutting down the cell permanently. The results showed that the functional layer did not affect the resistance, rate performance and cycle life. It was found the functional layer can significantly improve the safety of the battery when misused.

Graphical Abstract

Keywords

separator, shutdown temperature, lithium battery, safety

DOI Link

https://doi.org/10.13208/j.electrochem.150746

Publication Date

2015-10-28

Online Available Date

2015-10-28

Recommended Citation

Li BAI, Yong-jian HUAI, Xin-ping AI, Hai JIA. Characterization of the Separator with Thermal-Shutdown Layer for Use in Lithium Batteries[J]. Journal of Electrochemistry, 2015 , 21(5): 459-464.
DOI: 10.13208/j.electrochem.150746
Available at: https://jelectrochem.xmu.edu.cn/journal/vol21/iss5/9