电子元件与材料2012，Vol.31Issue(6)：22-27,6.
尖晶石型LiMn2-xGaxO4的合成及电化学性能研究
Synthesis of spinel LiMn2-xGaxO4 and their electrochemical characterisitics
摘要
Abstract
In order to improve the cyclic stability and capacity reversibility at high discharge rates of LiMn2O4 cathode materials for lithium-ion batteries. The spinel LiMn2-xGaxO4 (x=0. 0.02. 0.05, 0.07) cathode materials were prepared by a citric acid-assisted sol-gel method. The effects of Ga doping on the properties of prepared materials were studied. The results show that all the samples of LiMn2-xGaxO4 exhibit the same cubic spinel phase structure without impurity. The LiMn1.95Ga0.05O4 possesses a high initial discharge specific capacity of 117.1 mAh/g and good performance of cycle ability, retaining 97.9% of its discharge capacity after 95 cycles; it also shows that the initial discharge specific capacity of LiMn1.95Ga0.05O4 is 100.9 mAh/g at 4C rate, retaining 102.4 mAh/g after 30th cycle with high rate capability.关键词
锂离子电池/正极材料/尖晶石LiMn2-xGaxO4/Ga掺杂/电化学性能Key words
lithium-ion batteries/ cathode material/ spinel LiMn2-xGaxO4/ Ga doping/ electrochemical characteristic分类
信息技术与安全科学引用本文复制引用
王超,刘兴泉,刘宏基,向小春,张峥..尖晶石型LiMn2-xGaxO4的合成及电化学性能研究[J].电子元件与材料,2012,31(6):22-27,6.基金项目
国家自然科学基金资助项目(No.21071026) （No.21071026）
电子科技大学杰出人才引进项目资助(No.08JC00303) （No.08JC00303）
