摘要
采用直接融盐法合成了尖晶石化合物Li_(4/3)Ti_(5/3)O_4,采用X-射线衍射分析(XRD)和扫描电镜(SEM)对其进行物相分析。采用交流阻抗测试(EIS)研究了新鲜电极首次嵌锂过程中的电化学阻抗特征。通过选取适当的等效电路拟合实验所得的电化学阻抗谱数据,获得了首次嵌锂过程中固体电解质相界面膜(SEI)电阻、电荷传递电阻、Warburg扩散系数、累积电容和锂离子扩散系数随电极极化电位的变化规律。
The compound of spinel Li4/3Ti5/3O4, synthesized by direct molten-salt method, was certified by X-ray diffraction and scanning electron microscopy. The first intercalation of the spinel Li4/3Ti5/3O4 electrode was studied using electrochemical impedance spectroscopy （EIS）. Appropriate equivalent circuits were proposed to fit the experimental data. Based on the fitting results, the dependence of the resistance of SEI film, the resistance of charge transfer, the Warburg coefficient, the intercalation capacitance and the chemical diffusion coefficient on potential were obtained.
出处
《电池工业》
CAS
2009年第6期363-368,共6页
Chinese Battery Industry
