摘要
研究LiCoO2（或L1.05Co1／3Ni1/3Mn3O2）／LixC6锂离子电池材料的热分解特性以及锂离子电池在加热、过充、短路等情况下的爆炸机理．实验表明，50-350℃之间负极表面存在SEI膜的分解、LixC6与电解液乃至LixC6与PVDF等3种放热反应，电解液于178℃时开始放热，Li1-xCo1/3Ni1/3Mn1/3O2的热分解反应起始于230℃,锂离子电池在150℃加热时爆炸，1．5C过充至15min时爆炸，短路情况下不发生爆炸．
The heat character of Lithium-ion battery materials and explosion mechanism of Lithium-ion ceils under the overcharge, short-circuit and other abuse behavior are tested by C80 calorimeter, DSC and charge-discharge instrument. SEI reactions , Lix C6/electrolyte and Li, C6/PVDF reactions take place at the anodes. Electrolyte and solvent reactions happen after 178℃ and Li1-xCo1/3Ni1/3Mn1/3O2 decomposes after 230℃. The batteries exolode at 150℃ oven test or 1.5C,5.5 V overeharge and da nnt explode at short-circuit.
出处
《电化学》
CAS
CSCD
北大核心
2006年第3期266-270,共5页
Journal of Electrochemistry
基金
国家自然科学基金(20273047)
教育部博士点重点基金(20020056045)资助
关键词
锂离子电池
爆炸机理
热稳定性
过充
短路
Lithium-ion battery, Explosion mechanism, Thermal stability, Overcharge, Short-circuit
