热失控
分离器(采油)
短路
材料科学
多收费
阴极
热的
失效模式及影响分析
内阻
核工程
阳极
介电谱
电池(电)
电极
电压
电化学
电气工程
化学
复合材料
工程类
热力学
物理
物理化学
功率(物理)
作者
Lishuo Liu,Xuning Feng,Christiane Rahe,Weihan Li,Languang Lu,Xiangming He,Dirk Uwe Sauer,Minggao Ouyang
标识
DOI:10.1016/j.jechem.2021.03.025
摘要
Internal short circuit (ISC) is the major failure problem for the safe application of lithium-ion batteries, especially for the batteries with high energy density. However, how to quantify the hazard aroused by the ISC, and what kinds of ISC will lead to thermal runaway are still unclear. This paper investigates the thermal-electrical coupled behaviors of ISC, using batteries with Li(Ni1/3Co1/3Mn1/3)O2 cathode and composite separator. The electrochemical impedance spectroscopy of customized battery that has no LiPF6 salt is utilized to standardize the resistance of ISC. Furthermore, this paper compares the thermal-electrical coupled behaviors of the above four types of ISC at different states-of-charge. There is an area expansion phenomenon for the aluminum-anode type of ISC. The expansion effect of the failure area directly links to the melting and collapse of separator, and plays an important role in further evolution of thermal runaway. This work provides guidance to the development of the ISC models, detection algorithms, and correlated countermeasures.
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