四氧化三锰的简易制备及其作为电池阳极材料的电化学性能研究

在90℃下,采用空气氧化法于弱碱性介质中氧化Mn2+制备Mn3O4。X-射线衍射和扫描电镜表明,产物为四方结构的Mn3O4,纯度高、结晶良好,具有近似球形形貌。电化学测试结果表明,在50 mA/g的电流密度下,Mn3O4作为阳极材料的初始放电容量为198 mA.h/g。在不同电流密度下循环50次后,放电容量基本可以回到初始值。

Preparation of trimanganese tetraoxide and its electrochemical properties used as anode material in lithium ion batteries

Trimanganese tetraoxide was prepared by means of oxidizing Mn2+ with air in weak alkaline media at 90 ℃.The as-prepared sample was characterized by X-ray diffraction and scanning electron microscopy.Results showed that the product was tetragonal trimanganese tetraoxide which consisted of well-crystallized spherical particles with high purity.The electrochemical measurement results reveal that Mn3O4 anode exhibits an initial discharge capacity of 198 mA·h/g at the current density of 50 mA/g and the discharge capacity can nearly reach the initial value after 50 cycles at the different current density.