摘要
运用EIS法研究了锂离子正负极材料扣式电池和全电池的界面电荷传递过程,结合Arrhe-nius方程分别得到了锂离子电池正、负极材料扣式电池和全电池的界面反应活化能。结果表明,正极扣式电池界面反应活化能与正极材料本身性质密切相关,随正极材料的不同而不同;负极碳材料扣式电池界面反应活化能变化较小,负极扣式电池界面反应活化能大于正极扣式电池。全电池界面反应过程活化能与负极界面反应活化能比较接近,说明负极界面反应过程是整个电池界面反应过程的“控制步骤”。
In this paper,the process of interface charge-transfer about coin-cell,diamond-cell and 18650 has been studied by the electrochemical impedance spectroscopy.The activation energy of interface reaction about coin-cell,diamond-cell and 18650 was gained with Arrhenius equation.The results shaw that,there is a close correlation between the activation energy of interface reaction about cathode coin-cell and cathode structure.The activation energy of interface reaction about cathode changes with cathode materials.The difference of the activation energy of interface reaction about anode is very little.The interface reaction activation energy of anode is larger than that of cathode and similar to that of diamond-cell and 18650.It shows the interface reaction of anode is the key process in the interface reaction of diamond-cell and 18650.
作者
米成
MI Cheng(Hunan Research Istitiute for Nonferrous Environmental Protection Co.,Ltd.,Changsha 410100,China)
出处
《湖南有色金属》
CAS
2023年第1期55-58,83,共5页
Hunan Nonferrous Metals
关键词
锂离子电池
交流阻抗谱
界面反应
活化能
lithium ion battery
electrochemical impedance spectroscopy
interface reaction
activation energy
