Li_xMn_2O_4的组成对结构和性能的影响  

Effects of composition on the structure and the performance of spinelLi_xMn_2O_4 as cathode material for lithium ion batteries

作　　者：陈彦彬[1] 刘庆国[1] 

机构地区：[1]北京科技大学固体电解质研究室,北京100083

出　　处：《电源技术》2002年第4期275-277,共3页Chinese Journal of Power Sources

摘　　要：采用固相反应法合成了不同组成的锂离子蓄电池正极材料LixMn2 O4,并考察了材料组成对其结构和性能的影响。结果表明 ,随着nLi/nMn比值的提高 ,材料的晶格常数逐渐减小 ,电化学比容量随之降低 ,循环性能明显趋好 ;配比为x =1.0 5的材料倍率特性最好 ,其比容量和平均放电电位随放电倍率提高而降低幅度最小 ;x >1.0 5时的材料即使在Spinel Li xMn 2O 4 with various compositions were synthesized, and the effects of composition on the structure and the performance of spinel Li xMn 2O 4 were investigated. The results show that with the increase of n Li /n Mn molar ratio, the lattice constant and the specific capacity of the material decreases while its cycling stability increases. The material with optimum n Li /n Mn molar ratio x=1.05 has the best rate capability, of which the specific capacity and the discharge potential varies least with the increasing of discharge rate. The Li xMn 2O 4 material with x>1.05 shows ideal cycling stability even at 1 C rate.

关 键 词：LIXMN2O4 组成 结构 性能 锂离子蓄电池 正极材料 锰尖晶石 倍率特性 

分 类 号：TM912.2[电气工程—电力电子与电力传动]