摘要
利用柠檬酸络合法制备锂离子电池正极材料尖晶石型LiMn2 O4,利用X衍射、循环伏安、冲放电测试、交流阻抗等手段对其进行了研究 .发现活性物质在不同的电位下具有不同的电化学特征 ,当电位处在平台区时和处在非平台区时 ,交流阻抗谱明显不同 ;电位处于非充放电平台区时 ,高频表现为锂离子电极材料中的固态扩散 ,处在充放电平台区时 。
The positive material spinel LiMn 2O 4 of lithium ion battery was prepared by a modified citric acid complexation method. Its crystalline type and electrochemical properties were measured by XRD, cyclic voltammetry, and charge discharge at constant current and ac impedance. The results showed that active material had different characteristics at different potential. When in platform or not in platform, the ac impedance spectrum was different. When not in platform, the graph of high frequency stands for the solid diffusing of Li + in the electrode material, while in the platform, the graph of high frequency stands for the passage impedance of the electron moving to.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第5期108-110,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
