【作者】 刘浩文； 程翠霞； 周新文； 占丹； 刘巧云； 张克立；

【机构】 武汉大学化学与分子科学学院； 湖北省黄石市第五中学化学组；

【摘要】 在通过离子掺杂来改善尖晶石LiMn2O4的电化学性能中,科研工作者进行了大量的研究,所掺杂离子的氧化态不同,对LiMn2O4电化学性能的影响也不同。本文采用流变相法合成了不同氧化态离子掺杂的尖晶石化合物LiMn1.95M0.05O4(M=Li,Mg,Co,Ti, V),通过x射线衍射仪器对其结构进行表征,通过充放电测试其电化学性能,结果表明三价离子掺杂的化合物具有最佳的充放电容量和循环性能。通过归纳比较其他学者的研究结果,同样可以得出相似结论。更多还原

【Abstract】 In this paper, the metal ions of different oxidation states doped LiMn1.95M0.05O4 (M=Li, Mg, Co, Ti, V) were synthesized by rheolegical phase reaction method. The XRD showed that the samples exhibit the same phase as pure spinel. The lattice parameter of LiMn1.95M0.05O4 was smaller than that of the undoped one, which decreased with the different doped-ion. The electrochemical performances of the samples were studied and disclosed that LiMn1.95Co0.05O4 displayed a better capacity and cyclability. The conclusion can be drawn that the metal ions of+3 doped LiMn1.95M0.05O4 displayed the similar electrochem behaviors after lots of works have been done by researchers更多还原