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Preparation and characterization of Li2CoMn3O8 thin film cathodes for high energy lithium batteries

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Abstract

An ion layer gas reaction (ILGAR) dip-coating process for the deposition of homogeneous spinel structured Li2CoMn3O8 thin layers has been developed. Thin film cathodes for use in high-energy density lithium batteries with thicknesses of about 200 nm have been prepared. The films were found to be X-ray amorphous after preparation. After annealing at 700°C in air for 2 h, the spinel structure of Li2CoMn3O8 was observed by X-ray diffraction analysis. The composition of the surface was studied by XPS, which indicated enhanced Li and Mn concentrations as a result of the rinsing process and different solubilities of the precursor salts. The electrochemical behavior was investigated by separating the annealed electrode sample from a conventional organic lithium ion-conducting electrolyte by a layer of LiPON solid electrolyte and using elemental lithium as counter electrode. A capacity of 110.8 mAh/g was observed which is related to the valence changes of Mn and Co in the spinel structure.

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Authors and Affiliations

  1. Chair for Sensors and Solid State Ionics, Faculty of Engineering, Christian-Albrechts-University, Kaiserstr.2, D-24143, Kiel, Germany

    Y. Bai, C. Knittlmayer & W. Weppner

  2. Hahn-Meitner-Institute, SE 2, Glienickerstr. 100, D-14109, Berlin, Germany

    Y. Bai, S. Gledhill, I. Lauermann & Ch.-H. Fischer

Authors
  1. Y. Bai
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  2. C. Knittlmayer
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  3. S. Gledhill
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  4. I. Lauermann
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  5. Ch.-H. Fischer
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  6. W. Weppner
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Correspondence to W. Weppner.

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Bai, Y., Knittlmayer, C., Gledhill, S. et al. Preparation and characterization of Li2CoMn3O8 thin film cathodes for high energy lithium batteries. Ionics 15, 11–17 (2009). https://doi.org/10.1007/s11581-008-0287-z

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  • DOI: https://doi.org/10.1007/s11581-008-0287-z

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