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Effect of a surface treatment for LiNi1/3Co1/3Mn1/3O2 cathode material in lithium secondary batteries

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Abstract

LiNi1/3Co1/3Mn1/3O2 cathode material was surface-treated to improve its electrochemical performance. Al2O3 nanoparticles were coated onto the surface of LiNi1/3Co1/3Mn1/3O2 powder using a sol-gel method. The as-prepared Al2O3 nano-particle was identified as the cubic structure of Al2O3. XRD showed that the LiNi1/3Co1/3Mn1/3O2 structure was not affected by the Al2O3 coating. With a coating of 3 wt.% Al2O3 on LiNi1/3Co1/3Mn1/3O2, the cyclic-life performance and rate capability were improved. However, heavier coatings (5 wt.%) on LiNi1/3Co1/3Mn1/3O2 resulted in a considerable decrease of the discharge capacity and rate capability. The thermal stability of LiNi1/3Co1/3Mn1/3O2 materials was greatly improved by the 3 wt.% Al2O3 coating.

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Authors and Affiliations

  1. Battery Research Group, Korea Electrotechnology Research Institute, 28-1, Seongju-dong, Changwon-si, 641-120, Gyeongnam, Korea

    Hyun-Soo Kim & Ke-Tack Kim

  2. Department of Materials Science and Engineering, Iowa State University, 2220 Hoover Hall, 50011, Ames, Iowa, USA

    Young-Sik Kim & Steve W. Martin

Authors
  1. Hyun-Soo Kim
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  2. Ke-Tack Kim
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  3. Young-Sik Kim
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  4. Steve W. Martin
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Correspondence to Hyun-Soo Kim.

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Kim, HS., Kim, KT., Kim, YS. et al. Effect of a surface treatment for LiNi1/3Co1/3Mn1/3O2 cathode material in lithium secondary batteries. Met. Mater. Int. 14, 105–109 (2008). https://doi.org/10.3365/met.mat.2008.02.105

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  • DOI: https://doi.org/10.3365/met.mat.2008.02.105

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