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

Abstract

Abstract: Spinel lithium manganese oxides doped with rare earth elements in forms of LiM_0.02 Mn_1.98O₄ (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 LiPr_0.02Mn_1.98 O₄ and LiSm_0.02Mn_1.98 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

CLC Number:

O641

TrendMD:

WAN Chuan-Yun, NULI Yan-Na, JIANG Zhi-Yu. Rare Earth Elements-Doped Spinel LiM_0.02 Mn_1.98O₄ as the Cathodic Materials for Lithium Ion Batteries[J]. Chem. J. Chinese Universities, 2002, 23(1): 126.

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Rare Earth Elements-Doped Spinel LiM_0.02 Mn_1.98O₄ as the Cathodic Materials for Lithium Ion Batteries

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