LiCoO_2改性LiMn_2O_4的结构及性能  

Structure and performance of LiMn_2O_4 modified with LiCoO_2

作　　者：蔡振平[1] 李明勋[1] 卢世刚[1] 阚素荣[1] 金维华[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《电池》2005年第2期89-90,共2页Battery Bimonthly

基　　金：国家自然科学基金(50074012);863计划资助项目(2001AA323020)

摘　　要：采用固相反应法制备了尘晶石型LiMn2O4及改性LiMn2O4。利用XRD和SEM对合成产物的结构进行表征,并测试了它们的电化学性能。结果表明:用LiCoO2改性后的复合产物保持了尖晶石主体结构,随着LiCoO2量的增加,Mn—O键增强,晶胞参数减小,产物的结构性能较好。以合成的改性产物为正极材料,MCMB为负极材料,组装的063048型锂离子电池循环300次后,容量保持率在80%以上。Spinel LiMn_2O_4 and modified LiMn_2O_4 were synthesized by the solid-state reaction method. The XRD and SEM were used to study the structure properties and the electrochemical performance of products. The results showed that the crystal structure of modified LiMn_2O_4 was kept as spinel, and with the increasing of LiCoO_2, bonds of Mn-O were strengthened and lattice parameters were decreased,the structure stability was improved.The 063048 Li-ion battery assembled with the synthesized (products) as the cathode materials and MCMB as the anode material showed that its capacity retention was over 80% after 300 cycles.

关 键 词：锂离子电池 LIMN2O4 改性 

分 类 号：TM910[电气工程—电力电子与电力传动]