基于间苯三酚的电池热失效自毁机制研究  

Research on the Self-destruction Mechanism of Battery Thermal Failure Based on Phloroglucinol

作　　者：侯博文 彭勇[1] 冯旭宁[1] HOU Bowen;PENG Yong;FENG Xuning(School of Vehicle and Mobility,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学车辆与运载学院,北京100084

出　　处：《工程热物理学报》2024年第6期1663-1670,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金面上项目(No.52076121)。

摘　　要：高比能锂离子电池的热失控问题是限制其大规模应用的关键原因。本文从自毁电池的角度出发,以间苯三酚为自毁剂,阻断负极和电解液的反应,避免大量还原性气体的产生,减少气体串扰的反应热释放,最终降低热失控灾害程度。结果表明,间苯三酚的引入使热失控反应提前至120℃,且消除了200℃时的剧烈放热,实现了热失控反应时序的调控和热失控反应焓值的降低,提高了电池的安全性。本文为高安全电池设计提供了新的思路,具有一定的指导意义。The thermal runaway problem of high-energy lithium-ion batteries is a key factor that limits their large-scale application.In this work,we propose the phloroglucinol as a self-destructing agent blocks the reaction between the anode and the electrolyte,avoiding the production of large amounts of reducing gases,and thus reducing the reaction heat generated by gas crosstalk,and reducing the damage of thermal runaway.The results show that the introduction of the phloroglucinol advances the thermal runaway reaction to 120°C and eliminates the intense exotherm at 200°C,which achieves the regulation of the sequence of the thermal runaway reaction and the reduction of the enthalpy of the thermal runaway reaction,and thus improving battery safety.This work will provide a new idea for high safety battery design,which has certain guiding significance.

关 键 词：锂离子电池 自毁电池 热失控 反应时序调控 间苯三酚 

分 类 号：TK123[动力工程及工程热物理—工程热物理]