Thermal Behavior Investigation of LiNi1/3CO1/3Mn1/3O2-Based Li-ion Battery under Overcharged Test  

作　　者：Wang, Haiyan Tang, Aidong Huang, Kelong 

机构地区：[1]School of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China

出　　处：《Chinese Journal of Chemistry》2011年第1期27-32,共6页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （No. 50542004） and Graduate Degree Thesis Innovation Foundation of Central South University （No. 1960-71131100017）.

摘　　要：Thermal behavior of its components such as separator, electrolyte, cathode, anode, and each binder were inves- tigated by differential scanning calorimetry and thermal gravimetric （DSC/TG） to explain thermal runaway mechanism of Li-ion battery under overcharged test. DSC results indicated the decomposition reaction temperature of SEI （solid electrolyte interface） layer in anode was at about 126℃. It was found that heat generation in anode under normal charged state increased obviously with the increasing of charged voltage. When the battery was overcharged to 4.6 V or 5.0 V, the onset temperature and heat generation of thermal reaction in anode changed a little, while those in cathode had large increase. It was proposed that thermal behavior in cathode mainly caused by the reaction of electrolyte with evolutional oxygen played a key role to thermal runaway for the studied Li-ion battery under overcharged test.Thermal behavior of its components such as separator, electrolyte, cathode, anode, and each binder were inves- tigated by differential scanning calorimetry and thermal gravimetric （DSC/TG） to explain thermal runaway mechanism of Li-ion battery under overcharged test. DSC results indicated the decomposition reaction temperature of SEI （solid electrolyte interface） layer in anode was at about 126℃. It was found that heat generation in anode under normal charged state increased obviously with the increasing of charged voltage. When the battery was overcharged to 4.6 V or 5.0 V, the onset temperature and heat generation of thermal reaction in anode changed a little, while those in cathode had large increase. It was proposed that thermal behavior in cathode mainly caused by the reaction of electrolyte with evolutional oxygen played a key role to thermal runaway for the studied Li-ion battery under overcharged test.

关 键 词：lithium-ion battery LINI1/3CO1/3MN1/3O2 THERMOCHEMISTRY CALORIMETRY OVERCHARGE 

分 类 号：TM912[电气工程—电力电子与电力传动] S791.247[农业科学—林木遗传育种]