Characterization and Electrochemical Performance of Substituted LiNi0.4Co0.2-yAlyMn0.4O2 (0{less than or equal to}y{less than or equal to}0.2) Cathode Materials
Characterization and Electrochemical Performance of Substituted LiNi0.4Co0.2-yAlyMn0.4O2 (0{less than or equal to}y{less than or equal to}0.2) Cathode Materials
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DOI：
10.1149/1.2938904
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发表时间：
2008-05
期刊：
影响因子：
--
通讯作者：
J. Wilcox;M. Doeff
中科院分区：
文献类型：
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作者：
J. Wilcox;M. Doeff
LiNi0. 4Co0。2-yAlyMn 0. 4 O2（0y0.2）材料作为锂离子电池正极材料进行了合成和研究。当在2.0和4.3V（相对于Li/Li+）之间以0.1mA/cm 2的电流密度循环时，实现了约160 mAh/g（y= 0）至约110 mAh/g（y= 0.2）的稳定容量。在增加电流密度时，发现所有含铝的材料显示出降低的极化和改善的速率性能。对于y= 0.05的化合物，发现在所有电流密度下的最佳性能。讨论了铝取代对基质晶体结构的影响。
A complete series of LiNi0. 4Co0. 2-yAlyMn0. 4O2 (0 y 0.2) materials have been synthesized and investigated as cathode materials for lithium ion batteries. When cycled between 2.0 and 4.3 V vs. Li/Li+ at a current density of 0.1 mA/cm 2, stable capacities of~ 160 mAh/g for y= 0 to~ 110 mAh/g for y= 0.2 are achieved. Upon increasing the current density, it is found that all materials containing aluminum show reduced polarization and improved rate performance. The optimal performance at all current densities was found for the compound with y= 0.05. The effect of aluminum substitution on the crystal structure of the host is discussed.