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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Effects on Electrochemical Performances of Conductive Agents with Different Particle Size in Spinel LiMn2O4 Cathode for Li-ion Batteries

리튬이온전지용 스피넬계 LiMn2O4 양극에서 상이한 입자크기를 가진 전도성물질이 전기화학적 성능에 미치는 영향

  • 이창우 (한국전기연구원 전지연구그룹) ;
  • 이미숙 (한국전기연구원 전지연구그룹) ;
  • 김현수 (한국전기연구원 전지연구그룹) ;
  • 문성인 (한국전기연구원 전지연구그룹)
  • Published : 2005.08.01
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Abstract

Spinel $LiMn_2O_4$ has become appealing because manganese is inexpensive and environmentally benign. In general, cathodes for lithium ion batteries include carbon as a conductive agent that provides electron transfer between the active material and the current collector. In this work, we selected Acetylene Black and Super P Black as conductive agents, and then carried out their comparative investigation for the performances of the $Li/LiMn_2O_4$ cells using different conductive agents with different particle size. In addition, their electrochemical impedance characteristic of $Li/Mn_2O_4$ cells using different conductive agents is effectively identified through a.c. impedance technique. As a consequence, $Li/LiMn_2O_4$ cells with Super P Black show better electrochemical performances ascribed to the significant contribution of feasible ionic conduction due to larger particle size than those with Acetylene Black.

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References

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