Synthesis and materials characterization of Li2MnO3-LiCrO2 system nanocomposite electrode materials |
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| Authors: | CW Park I Ruth Mangani S Boo |
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| Affiliation: | a Department of Materials Science and Engineering, Chonnam National University, Gwangju 500-757, South Korea
b Energy & Applied Optics Team, Gwangju Research Center Korea Institute of Industrial Technology, Gwangju 500-460 Korea |
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| Abstract: | A series of LiCrxLi(1−x)/3Mn2(1−x)/3]O2, (0.2 ≤ x ≤ 0.4) with nanocomposite structures was synthesized by a solution method with subsequent quenching. The sample structures were investigated by X-ray diffraction (Rietveld refinement), electron diffraction and HRTEM. According to co-indexed electron diffraction patterns and HRTEM images, LiCr0.211Li0.268Mn0.520]O2 was found to be composed of solid solution powders and LiCr0.290Li0.240Mn0.470]O2 and LiCr0.338Li0.225Mn0.436]O2 of nanocomposite powders indexed in monoclinic and hexagonal structure. Among the three compounds, the nanocomposite LiCr0.290Li0.240Mn0.470]O2 cathode prevented spinel-like structural transformation during cycling and delivered a good reversible capacity of about 195 mAh/g. |
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| Keywords: | A Layered compound |
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