胺类添加剂对NCM811||SiC电池热失控抑制效果研究  

Effect of Amine Additives on Thermal Runaway Inhibition of SiC||NCM811 Batteries

作　　者：侯博文 何龙 冯旭宁[1] 张伟峰 王莉[3] 何向明[3] Bo-Wen Hou;Long He;Xu-Ning Feng;Wei-Feng Zhang;Li Wang;Xiang-Ming He(State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China;Department of Automotive Engineering,School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Institute of Nuclear and New Energy Technology,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084 [2]上海理工大学机械工程学院汽车工程系,上海200093 [3]清华大学核能与新能源技术研究院,北京100084

出　　处：《电化学（中英文）》2023年第8期13-20,共8页Journal of Electrochemistry

基　　金：supported by the National Natural Science Foundation of China(NO.52076121)。

摘　　要：高镍三元电池的高能量密度是取代化石能源,推动清洁能源发展的核心优势,同时也是导致电池严重安全隐患的根本原因。初级胺类与次级胺类能与常见的含碳酸乙烯酯电解液发生开环聚合,从而形成正负极间隔离层,提高电池热安全性。本文基于胺类和电池组分间的化学反应,在电池材料层面和单体层面对电池的安全性展开了研究。在材料层面,利用差示扫描量热法测试锂离子电池中有无胺类添加剂对不同组分间的热稳定性影响。在单体层面,使用绝热加速量热仪对有无添加剂全电池的安全性进行测试,提取热失控特征温度。加入胺类添加剂后电池组分间部分化学反应被提前,同时总放热量明显减少,最大温升速率下降,电池热失控得到有效抑制。The high energy density of NCM batteries with high nickel content is a key advantage in replacing fossil fuels and promoting clean energy development,at the same time,is also a fundamental cause of serious safety hazards in batteries.Primary and secondary amines can lead to ring-opening polymerization of common ethylene carbonate electrolytes,resulting in an isolation layer between the cathode and the anode,and improving the thermal safety of the battery.In this work,the safety of batteries is considered both at the material level and at the cell level,based on the chemical reactions between amines and the battery components.At the material level,the effect of the presence or absence of amine additives on the thermal stability of the different components of the lithium-ion battery was tested by differential scanning calorimetry.At the cell level,the safety of the whole battery with and without additives was tested by using accelerating rate calorimeter to extract thermal runaway(TR)characteristic temperatures.The addition of the amine resulted in an earlier onset of some of the chemical reactions between the battery components,as well as a significant reduction in total heat release and a decrease in the maximum temperature rise rate,such that TR,was effectively suppressed.

关 键 词：锂电池 热失控抑制 胺 电解液 开环聚合 

分 类 号：TM912[电气工程—电力电子与电力传动]