高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (1): 126.

• 研究快报 • 上一篇    下一篇

掺稀土的LiM0.02Mn1.98O4锂离子电池正极材料

万传云, 努丽燕娜, 江志裕   

  1. 复旦大学化学系, 上海 200433
  • 收稿日期:2001-02-21 出版日期:2002-01-24 发布日期:2002-01-24
  • 通讯作者: 江志裕(1940年出生),男,教授,博士生导师,从事表面电化学和高能化学电源研究.
  • 基金资助:

    国家自然科学基金(批准号:29833090)资助

Rare Earth Elements-Doped Spinel LiM0.02 Mn1.98O4 as the Cathodic Materials for Lithium Ion Batteries

WAN Chuan-Yun, NULI Yan-Na, JIANG Zhi-Yu   

  1. Department of Chemistry, Fudan University, Shanghai 200433, China
  • Received:2001-02-21 Online:2002-01-24 Published:2002-01-24

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关键词: 锂二次电池, 稀土元素, 尖晶石型锂锰氧化物

Abstract: Spinel lithium manganese oxides doped with rare earth elements in forms of LiM0.02 Mn1.98O4 (M=La, Pr and Sm) were prepared and their electrochemical properties for lithium ion intercalation reaction were investigated. The materials were prepared by solid state reaction using electrolytic MnO2, Li2CO3 with Pr2O3, Sm2O3 or La(NO3)3·H2O. From the voltammetry test it was found that the reversibility of lithium intercalation reaction could be improved by doping with Sm or Pr into spinel lithium manganese oxides. Although the first discharge capacity was decreased by about 10% for LiPr0.02Mn1.98 O4 and LiSm0.02Mn1.98 O4 compounds compared with undoped LiMn2O4, but their cycling properties were improved, obviously.

Key words: Lithium secondary battery, Rare earth elements, Spinel lithium manganese oxides

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