Structural and Electrochemical Characterization of LiMn2-2xLixNixO4 (0≤x≤0.1) Cathode Materials

Abstract

Abstract: Lithium and nickel co-doped LiMn_2-2xLi_xNi_xO₄ cathode materials (x= 0, 0.03, 0.05, 0.075, 0.1) were synthesized by a high temperature solid-state reaction route. The microstructures and morphologies of the samples were characterized by X-ray powder diffraction, X-ray absorption fine structure analysis and field emitted scanning electronic microscopy. The bond lengths of the MnO6 octahedrons and the electrochemical performances in both room temperature and elevated temperature (55℃) were characterized and discussed in comparison with LiMn₂O₄ spinel. The result reveals that LiMn_2-2xLi_xNi_xO₄ samples have a good reversibility. It is suggested that the co-doping of lithium and nickel in LiMn₂O₄-based compounds could stabilize the spinel structure and improve the capacity retention of the cathode materils.

Key words: lithium ion battery, cathode material, co-doping, structure analysis

CLC Number:

TM911

TU Jian,CAO Gao-Shao,ZHUANG Da-Gao,ZHAO Xin-Bing. Structural and Electrochemical Characterization of LiMn_2-2xLi_xNi_xO₄ (0≤x≤0.1) Cathode Materials[J]. Journal of Inorganic Materials.

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Structural and Electrochemical Characterization of LiMn_2-2xLi_xNi_xO₄ (0≤x≤0.1) Cathode Materials

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