Exothermic behaviors of mechanically abused lithium-ion batteries with dibenzylamine

JOURNAL OF POWER SOURCES

卷:326

Article

Shi, Yang¹  Noelle, Daniel J.¹  Wang, Meng²  Le, Anh V.²  Yoon, Hyojung³  Zhang, Minghao³  Meng, Ying Shirley^1,3  Qiao, Yu^1,2 

[1] Univ Calif San Diego, Program Mat Sci & Engn, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA

[3] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92093 USA

关键词: Lithium-ion battery;    Thermal runaway;    Safety;    Conductivity;    Electrolyte;   

DOI  :  10.1016/j.jpowsour.2016.07.034

来源: Elsevier

【 摘 要 】

A thermal-runaway retardant (TRR) of lithium-ion batteries (LIBs), dibenzylamine (DBA), is investigated. In a TRR-modified LIB, DBA can be encapsulated in packages made of inert materials. When the LIB is subjected to mechanical abuse, the packages would be broken apart and the TRR is released. In nail penetration and impact tests, addition of 4 wt% DBA reduces the temperature increase of fully charged LIR-2450 cells by nearly 50%. The influence of TRR packages on the cycling performance of LIBs is negligible. The working mechanism of DBA is associated with the decrease in electrolyte conductivity, the increase in charge transfer resistance, and the reduction in lithium ion (Li+) transference numbers. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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