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Polyaspartic-acid-pyrolysis route for the synthesis of nanocrystalline LiCo0.15Mn1.85O4 powder for Li-ion batteries

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Abstract

Nanocrystalline cubic spinel LiCo0.15Mn1.85O4 powder was prepared by a novel method based on in situ polymerization of aspartic acid along with metal salts. Thermal study shows that the complete crystallization and/or formation of the compound is at 358 °C. The structural property of the synthesized material was characterized by X-ray diffraction studies. The X-ray diffractogram reveals the single-phase formation of the product. Scanning electron microscope study shows that the average grain size of the powder is less than 1 μm. To assess the electrochemical performance of the synthesized cathode material, the C/LiCo0.15Mn1.85O4 cell with 1 M LiPF6 in 1:1 (v/v) mixture of ethylene carbonate and dimethyl carbonate as the electrolyte was assembled, and the charge and discharge studies were made in between 3.0 and 4.8 V at a constant current density of 0.1 mAcm−2. It shows that capacity loss is only 2% even after the 50th cycle. As this preparation method is simple and particularly suitable for preparation of highly homogeneous mixed metal oxides for Li-ion batteries.

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Acknowledgements

The authors gratefully acknowledge the DST, New Delhi for financial support.

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Authors and Affiliations

  1. Advanced Materials Research Lab, Department of Industrial Chemistry, Alagappa University, Karaikudi, 630 003, India

    A. Subramania, N. Angayarkanni & T. Vasudevan

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  1. A. Subramania
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  2. N. Angayarkanni
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  3. T. Vasudevan
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Correspondence to A. Subramania.

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Subramania, A., Angayarkanni, N. & Vasudevan, T. Polyaspartic-acid-pyrolysis route for the synthesis of nanocrystalline LiCo0.15Mn1.85O4 powder for Li-ion batteries. Ionics 13, 61–65 (2007). https://doi.org/10.1007/s11581-007-0067-1

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  • DOI: https://doi.org/10.1007/s11581-007-0067-1

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