钕, 铈掺杂的正极材料尖晶石型LiMn2O4的制备及性能

通过掺杂不同含量的Ｎｄ，Ｃｅ制备ＬｉＭｎ２－ｘＲＥｘＯ４（ＲＥ＝Ｃｅ，Ｎｄ；ｘ＝０，０．０５，０．１，０．１５，０．２）锂离子电池正极材料，研究稀土元素拓杂对尖晶石ＬｉＭｎ２Ｏ４正极材料电化学性质的影响。掺杂Ｎｄ，Ｃｅ后ＬｉＭｎ２Ｏ４正极材料更适合于锂离子的嵌入和脱出，电池的循环性能提高，但充放电容量随掺杂量的增加而下降。Ｘ射线光电子能谱分析表明掺杂Ｎｄ，Ｃｅ的ＬｉＭｎ２Ｏ４正极材料，其Ｍｎ＾４＋

Preparation and Properties of LiRExMn2-xO4(RE=Nd, Ce) as a Cathode

LiRE x Mn 2-x O 4(RE=Ce, Nd) was studied in order to further understand the dependence of the electrochemical performance on the doped rare earth metals. These cathodes are more tolerant to repeated lithium extraction and insertion than a standard LiMn 2O 4 spinel electrode in spite of a small reduction in the initial capacity. X ray photoelectron spectroscopy results show that the Mn 4 contents of spinel LiMn 2O 4 samples directly affect the initial capacity and cyclability of LiMn 2O 4 cathode materials.