Preparation and Electrochemical Properties of xLi2MnO3·(1-x)LiMn2O4 Composites

doi:10.1007/s40242-013-2267-8

Abstract

Abstract:

Li₂MnO₃-doped spinel LiMn₂O₄ composites were synthesized by sol-gel method to improve the electrochemical performance of LiMn₂O₄. The microstructures, morphologies and electrochemical performance of the obtained xLi₂MnO₃·(1-x)LiMn₂O₄ composites were characterized by X-ray diffraction(XRD), scan electron microscopy(SEM) and a galvanostatic charge-discharge process. It was found that both Li₂MnO₃ and LiMn₂O₄ components exist in xLi₂MnO₃·(1-x)LiMn₂O₄(0<x<1) composites. The 0.3Li₂MnO₃·0.7LiMn₂O₄ composite shows the optimized electrochemical performance, including discharge capacity and cycle stability. It was demonstrated that Li₂MnO₃-doped spinel LiMn₂O₄ cathode material can work at wide potential window with quite good capacity retention and considerably larger reversible capacity compared to single-phase LiMn₂O₄ component.

Key words: Spinel, Composite, Electrochemical performance

YAO Su-mei, ZHANG Jing-wen, GUO Xun, QIU Xin-ping. Preparation and Electrochemical Properties of xLi₂MnO₃·(1-x)LiMn₂O₄ Composites[J]. Chemical Research in Chinese Universities, 2013, 29(2): 307-310.

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Preparation and Electrochemical Properties of xLi₂MnO₃·(1-x)LiMn₂O₄ Composites

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