Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electrochemical Properties of $LiFePO_4-LiCoO_2$ Cathode Materials in Lithium Secondary Batteries

리튬이차전지 정극활물질용 $LiFePO_4-LiCoO_2$의 전기화학적 특성

  • Kong, Ming-Zhe (Battery Research Group, Korea Electrotechnology Research Institute) ;
  • Kim, Hyun-Soo (Battery Research Group, Korea Electrotechnology Research Institute) ;
  • Kim, Ke-Tack (Battery Research Group, Korea Electrotechnology Research Institute)
  • 공명철 (한국전기연구원, 전지연구그룹) ;
  • 김현수 (한국전기연구원, 전지연구그룹) ;
  • 김기택 (한국전기연구원, 전지연구그룹)
  • Published : 2006.11.09
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Abstract

In this work, the $LiFePO_4-LiCoO_2$ mixed cathode electrodes were prepared and their electrochemical performances were measured in different current density. The cell of $LiFePO_4-LiCoO_2$ observed two voltage plateau regions at 3.4 and 3.9V. The cell of $LiFePO_4-LiCoO_2$ (90:10 wt%) mixed cathode delivered a discharge capacity of ca. 139.8 mAh/g at a 0.2C rate. The capacity of the cell decreased with the current rate and a useful capacity of ca 85.7mAh/g was obtained at a 2C rate.

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