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LiMnBO3/C: A Potential Cathode Material for Lithium Batteries

  • Aravindan, V. (The Research Institute for Catalysis, Chonnam National University) ;
  • Karthikeyan, K. (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Amaresh, S. (Faculty of Applied Chemical Engineering, Chonnam National University) ;
  • Lee, Y.S. (Faculty of Applied Chemical Engineering, Chonnam National University)
  • Received : 2009.12.12
  • Accepted : 2010.03.25
  • Published : 2010.06.20

Abstract

$LiMnBO_3$ was successfully synthesized by a solid-state reaction method both with and without a carbon coating. Adipic acid was used as source material for the carbon coating. $LiMnBO_3$ was composed of many small polycrystalline particles with a size of about 50 - 70 nm, which showed a very even particle morphology and highly ordered crystalline particulates. Whereas the carbon coated $LiMnBO_3$ was well covered by mat-like, fine material consisting of amorphous carbon derived from the carbonization of adipic acid during the synthetic process. Carbon coated cell exhibited improved and stable discharge capacity profile over the untreated. Two cells delivered an initial discharge capacity of 111 and 58 mAh/g for $LiMnBO_3$/C and $LiMnBO_3$, respectively. Carbon coating on the surface of the $LiMnBO_3$ drastically improved discharge capacity due to the improved electric conductivity in the $LiMnBO_3$ material.

Keywords

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