Proceedings of the Materials Research Society of Korea Conference (한국재료학회:학술대회논문집)

Materials Research Society of Korea (한국재료학회)
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The Effect of Metal-Oxide Coating on the Electrochemical Properties in Thin-Film $LiCoO_2$ Cathodes

금속산화물 코팅을 통한 박막 $LiCoO_2$양극의 전기화학적 특성 향상

  • 김혜민 (서울대학교 재료공학부) ;
  • 김병수 (서울대학교 재료공학부) ;
  • 김용정 (서울대학교 재료공학부) ;
  • 조재필 (금오공과대학교 응용화학과) ;
  • 박병우 (서울대학교 재료공학부)
  • Published : 2003.11.01
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Abstract

To improve the electrochemical properties of thin-film LiCoO$_2$ cathodes, metal oxides were coated on the LiCoO$_2$ thin films using f sputtering. Galvanostatic charge-discharge experiments showed the enhanced cycling behaviors in the metal-oxide coated LiCoO$_2$ thin films than the uncoated ones. These results are because the metal-oxide coating layer suppresses the degradation of Li-diffusion kinetics during cycling, which is related to the protection of cathode surface from the electrolytes [l-3]. The variation in the metal-oxide coating thickness ranging from 10 to 300 nm did not affect the electrochemical properties. Changes of lattice constants in the coated and bare LiCoO$_2$ thin films at different charged states will also be discussed.

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