Thermal stability of ethylene carbonate reacted with delithiated cathode materials in lithium-ion batteries

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• 作者：Yih-Shing Duh ; Yu-Ling Chen ; Chen-Shan Kao
• 关键词：Lithium ; ion battery ; Cathode material ; Confinement test ; Onset temperature ; Thermal stability ; Ethylene carbonate
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：127
• 期：1
• 页码：995-1007
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

Confinement tests are implemented for measuring exothermic behaviors of eight delithiated or non-lithiated cathode materials mixed with ethylene carbonate (EC) which are commonly used in lithium-ion batteries. Eight delithiated and non-lithiated cathode materials, namely lithium cobalt oxide (Li_xCoO₂), nickel oxide (NiO₂), lithium nickel oxide (Li_xNiO₂), lithium nickel cobalt oxide (Li_xNi_0.8Co_0.2O₂), manganese oxide (Mn₂O₄), lithium manganese oxide (Li_xMn₂O₄), cobalt oxide (Co₃O₄) and iron phosphate (FePO₄)are mixed with EC under a programmed rate of heating, respectively. Trajectories of temperature and pressure are measured simultaneously in the confined apparatus. Characteristics of thermal runaway such as onset temperature, maximum temperature, maximum pressure, maximum self-heat rate, etc., are assessed. The ranking of thermal stabilities of delithiated cathode and non-lithiated materials with EC is discussed and compared.