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电化学(中英文) ›› 2000, Vol. 6 ›› Issue (3): 363-363. 

• 研究论文 • 上一篇    下一篇

液相法合成锂离子电池正极材料Li_(1+x)Mn_2O_4

刘培松,刘兴泉,李庆,陈召勇,张伯兰,于作龙   

  1. 中国科学院成都有机化学研究所功能材料研究开发中心!四川成都610041,中国科学院成都有机化学研究所功能材料研究开发中心!四川成都610041,中国科学院成都有机化学研究所功能材料研究开发中心!四川成都610041,中国科学院成都有机化学研究所功能材料研究开发中心!四川成都610041
  • 收稿日期:2000-08-28 修回日期:2000-08-28 出版日期:2000-08-28 发布日期:2000-08-28

Synthesis of Li_(1+x)Mn_2O_4 cathode material for lithium-ion batteries with solution method

LIU Pei song,LIU Sing quarn,Li qing,CHEN Zhao yong ZHANG Bai lan,YU Zuo long *   

  1. (Research and Developing Center for Functional Materials, Chengdu Inst of Organic Chem,Chinese Academy of Scie,Chengdu 610041,China
  • Received:2000-08-28 Revised:2000-08-28 Published:2000-08-28 Online:2000-08-28

摘要: 采用柠檬酸络合和溶液浸渍两种方法制备Li1+xMn2 O4正极材料 ,用XRD和BET测试了材料晶体结构和比表面积 ,考察焙烧温度、Li/Mn比、起始原料对产物结构和电化学性能的影响 ,结果表明 ,焙烧温度与Li/Mn比是影响材料电化学性能的关键因素 ,确定了制备Li1+xMn2 O4材料最佳条件为 0≤x≤ 0 .0 5 ,焙烧温度 75 0°C ,所得电池材料首次充放电容量达到 1 2 0mAh/g .循环 5 0次后 ,其充放电容量为 1 1 5mAh/g .

关键词: 锂离子电池, 尖晶石结构, 锂锰氧化物, 络合法, 浸渍法

Abstract: The cathode materials Li 1+x Mn 2O 4 were prepared with citric acid complexing and solution impregnating methods.Structure characterization and specific surface area test were performed by means of XRD,BET methods ,the influences of calcination temperature,Li/Mn molar ratio and raw materials on the structure and electrochemical capacity of samples have beem examined.The results showed that the Li/Mn molar ratio and calcimation temperature were the key factors affecting the electrochemical capacity of cathode materias.The optimum conditions for synthesis of Li 1+x Mn 2O 4 cathode material were 0≤x≤0.05 and calcined at 750°C.The initial capacity of the sample reached 120 mAh/g and capacity retention after 50 cycles was 115 mAh/g.

Key words: Li ion Battery, Spinel structure, Lithium manganese oxide, Complex method, Impergnation method

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