尖晶石型正极材料LiCr_xMn_(2-x)O_4的电化学特性  

Studying of the electrochemical characterization on chromium modified spinel anode LiCr_xMn_(2-x)O_4

作　　者：卢星河 唐致远[2] 张娜[2] 韩冬[1] 马楠[1] 

机构地区：[1]河北工程学院城建学院,河北邯郸056038 [2]天津大学化工学院,天津300072

出　　处：《河北建筑科技学院学报》2004年第4期8-10,28,共4页Journal of Hebei Institute of Architectural Science & Technology

基　　金：国家自然科学基金(20273047)教育部博士点基金资助项目(20020056045)

摘　　要：采用高温熔融固相浸渍法合成了掺杂铬元素的尖晶石型锰酸锂LiCrxMn2-xO4。XRD测试结果显示所合成的产品均为尖晶石结构。以该活性物质作为锂离子电池的正极材料,通过充放电测试、微分容量以及循环伏安方法的研究表明,掺铬尖晶石型LiCrxMn2-xO4材料在充放电电压区间内所发生的电化学反应经历两个阶段,同时表明铬的掺入能够有效抑制尖晶石型锰酸锂材料的可逆容量的衰减,提高了材料的稳定性。The modified spinel oxide LiCrxMn2-xO4 was prepared by solid state method. The electrochemical characterization of prepared spinel oxides materials as anode of lithium ion battery was analyzed by the examination of charge & discharge performance, differential capacity and cyclic voltammetry method, which demonstrated two electrochemical process. The doped spinel oxide LiCrxMn2-xO4 can improve cyclic stability based on the cyclic charge & discharge test.

关 键 词：锂离子电池 掺铬尖晶石 正极材料 电化学性能 稳定性 

分 类 号：O614.111[理学—无机化学]