采用高温固相分段反应法制备了尖晶石LiMn2O4和Mg^2+掺杂的Li1-xMgxMn2O4(x=0.05、0.1)材料,对材料进行了XRD结构分析和电化学性能等测试,结果表明:Mm^2+掺杂样品Li1-xMgxMn2O4(x=0.05、0.1)仍保持尖晶石相Fd3m结构;循环性能明显改善,室温条件下50次循环后,样品Li0.9Mg0.1Mn2O4的放电容量为100mAh/g,容量保持率为9.9%,而LiMn2O4容量衰减率仅为18.1%。
Mg^2+ -doped spinel lithium manganese oxides Li1-x Mgx Mn2O4 (x = 0,0. 05 and 0. 1)are synthesized by high temperature solid state reaction. Powder X-ray diffraction is used to measure the structure of the samples. The results indicate that the doped Li1-x Mgx Mn2O4 (x= 0. 05,0. 1)maintain the cubic structure of spinel phase Fd3m. The electrochemical properties are characterized by electrochemical method. The capacity fading rate of Mg^2+-doped Li0.9Mg0.1Mn2O4 is 9. 9% after 50 cycles at room temperature,while LiMn2O4 is 18. 1%.