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Al2O3 coating for improving thermal stability performance of manganese spinel battery

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Abstract

The synthesis of Al2O3-coated and uncoated LiMn2O4 by solid-state method and fabrication of LiMn2O4/graphite battery were described. The structure and morphology of the powders were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The electrochemical and overcharge performances of Al2O3-coated and uncoated LiMn2O4 batteries were investigated and compared. The uncoated LiMn2O4 battery shows capacity loss of 16.5% after 200 cycles, and the coated LiMn2O4 battery only shows 12.5% after 200 cycles. The uncoated LiMn2O4 battery explodes and creates carbon, MnO, and Li2CO3 after 3C/10 V overcharged test, while the coated LiMn2O4 battery passes the test. The steadier structure, polarization of electrode and modified layer are responsible for the safety performance.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China

    Yun-jian Liu  (刘云建)

  2. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Yun-jian Liu  (刘云建), Hua-jun Guo  (郭华军) & Xin-hai Li  (李新海)

Authors
  1. Yun-jian Liu  (刘云建)
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  2. Hua-jun Guo  (郭华军)
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  3. Xin-hai Li  (李新海)
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Corresponding author

Correspondence to Yun-jian Liu  (刘云建).

Additional information

Foundation item: Project(10JDG041) supported by the Advanced Person Fund of Jiangsu University, China; Project(2007CB613607) supported by the National Basic Research Program of China

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Liu, Yj., Guo, Hj. & Li, Xh. Al2O3 coating for improving thermal stability performance of manganese spinel battery. J. Cent. South Univ. Technol. 18, 1844–1848 (2011). https://doi.org/10.1007/s11771-011-0912-2

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  • DOI: https://doi.org/10.1007/s11771-011-0912-2

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