Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The Effects of Li-La-Ti-O Coating on the Properties of Li[Ni0.3Co0.4Mn0.3]O2 Cathode Material

Li[Ni0.3Co0.4Mn0.3]O2 양극물질의 Li-La-Ti-O코팅 효과

  • 이혜진 (경기대학교 첨단산업공학부 신소재공학) ;
  • 윤수현 (경기대학교 첨단산업공학부 신소재공학) ;
  • 박보건 (경기대학교 첨단산업공학부 신소재공학) ;
  • 유제혁 (경기대학교 첨단산업공학부 신소재공학) ;
  • 김관수 (경기대학교 첨단산업공학부 신소재공학) ;
  • 김석범 (경기대학교 첨단산업공학부 신소재공학) ;
  • 박용준 (경기대학교 첨단산업공학부 신소재공학)
  • Received : 2009.07.15
  • Accepted : 2009.09.17
  • Published : 2009.10.01
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Abstract

Li(Ni, Co, Mn)$O_2$ has been known as one of the most promising cathode materials for lithium secondary batteries. However, it has some problems to overcome for commercialization such as inferior rate capability and unstable thermal stability. In order to address these problems, surface modification of cathode materials by coating has been investigated. In the coating techniques, selection of coating material is a key factor of obtaining enhanced properties of cathode materials. In this work, we introduced solid electrolyte (Li-La-Ti-O) as a coating material on the surface of $Li[Ni_{0.3}Co_{0.4}Mn_{0.3}]O_2$ cathode. Specially, we focused on a rate performance of Li-La-Ti-O coated $Li[Ni_{0.3}Co_{0.4}Mn_{0.3}]O_2$ cathode. Both bare and Li-La-Ti-O 2 wt.% coated sample showed similar discharge capacity at 0.5C rate. However, as the increase of charge-discharge rate to 3C, the coated samples displayed better discharge capacity and cyclic performance than those of bare sample.

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References

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