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Synthesis and electrochemical performance of Li2Mg0.15Mn0.4Co0.45SiO4/C cathode material for lithium ion batteries

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Abstract

The synthesis, structure and performance of Li2Mg0.15Mn0.4Co0.45SiO4/C cathode material were studied. The Li2Mg0.15Mn0.4Co0.45SiO4/C solid solution with orthorhombic unit cell (space group Pmn21) was synthesized successfully by combination of wet process and solid-state reaction at high temperature, and its electrochemical performance was investigated primarily. Li2Mg0.15Mn0.4Co0.45SiO4/C composite materials deliver a charge capacity of 302 mA·h/g and a discharge capacity of 171 mA·h/g in the first cycle. The discharge capacity is stabilized at about 100 mA·h/g after 10 cycles at a current density of 10 mA/g in the voltage of 1.5–4.8 V vs Li/Li+. The results show that Mg-substitution for the Co ions in Li2Mn0.4Co0.6SiO4 improves the stabilization of initial structure and the electrochemical performance.

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Authors and Affiliations

  1. Department of Chemistry and Material Science, Hunan Institute of Humanities, Science and Technology, Loudi, 417000, China

    Chuan-yue Hu  (胡传跃), Jun Guo  (郭军), Si-jun Li  (李四军), Yang-xi Peng  (彭秧锡) & Jin Wen  (文瑾)

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  1. Chuan-yue Hu  (胡传跃)
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  2. Jun Guo  (郭军)
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  3. Si-jun Li  (李四军)
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  4. Yang-xi Peng  (彭秧锡)
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  5. Jin Wen  (文瑾)
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Corresponding author

Correspondence to Chuan-yue Hu  (胡传跃).

Additional information

Foundation item: Project(10B054) supported by Scientific Research Fund of Hunan Provincial Education Department, China; Projects(2011GK2002, 2011FJ3160) supported by the Planned Science and Technology Program of Hunan Province, China

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Hu, Cy., Guo, J., Li, Sj. et al. Synthesis and electrochemical performance of Li2Mg0.15Mn0.4Co0.45SiO4/C cathode material for lithium ion batteries. J. Cent. South Univ. 19, 1791–1795 (2012). https://doi.org/10.1007/s11771-012-1209-9

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  • DOI: https://doi.org/10.1007/s11771-012-1209-9

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