Mitigating thermal runaway hazard of high-energy lithium-ion batteries by poison agent  

作　　者：Xin Lai Zheng Meng Fangnan Zhang Yong Peng Weifeng Zhang Lei Sun Li Wang Fei Gao Jie Sheng Shufa Su Yuejiu Zheng Xuning Feng 

机构地区：[1]School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [2]svoLT Energy Technology Co.Ltd,Changzhou 213200,Jiangsu,China [3]State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China [4]State Grid Jiangsu Electric Power Co.,Ltd,Nanjing 211103,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2023年第8期3-15,I0002,共14页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China (52076121, 51977131, and 51877138);the Natural Science Foundation of Shanghai (19ZR1435800);the State Key Lab-oratory of Automotive Safety and Energy under Project No. KF2020;the Shanghai Science and Technology Development Fund(19QA1406200)。

摘　　要：Lithium-ion batteries with high-energy density are extensively commercialized in long-range electric vehicles. However, they are poor in thermal stability and pose fire or explosion, which has attracted the global attention. This study describes a new route to mitigate the battery thermal runaway(TR) hazard by poison agents. First, the self-destructive cell is built using the embedded poison layer. Then, the poisoning mechanism and paths are experimentally investigated at the material, electrode, and cell levels. Finally, the proposed route is verified by TR tests. The results show the TR hazard can be significantly reduced in the self-destructive cell based on a new reaction sequence regulation. Specifically, the maximum temperature of the self-destructive cell is more than 300℃ lower than that of the normal cell during TR. The drop in maximum temperature can reduce total heat release and the probability of TR propagation in the battery system, significantly improving battery safety.

关 键 词：Energystorage LITHIUM-IONBATTERIES Thermal runaway Self-poison Chemical reactions 

分 类 号：TM912[电气工程—电力电子与电力传动]