Improvement on Electrochemical Performances of Lithium-Ion Batteries Using Binary Conductive Agents

이성분계 전도성물질을 이용한 리튬이온전지의 전기화학적 성능 향상에 관한 연구

  • Lee, Chang Woo (Battery Research Group, Korea Electrotechnology Research Institute (KERI)) ;
  • Lee, Mi Sook (Battery Research Group, Korea Electrotechnology Research Institute (KERI)) ;
  • Kim, Hyun Soo (Battery Research Group, Korea Electrotechnology Research Institute (KERI)) ;
  • Moon, Seong In (Battery Research Group, Korea Electrotechnology Research Institute (KERI))
  • 이창우 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 이미숙 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 김현수 (한국전기연구원 재료응용연구단 전지연구그룹) ;
  • 문성인 (한국전기연구원 재료응용연구단 전지연구그룹)
  • Received : 2005.06.24
  • Accepted : 2005.07.29
  • Published : 2005.10.10

Abstract

In order to improve the electrochemical performances of Li-ion batteries when spinel $LiMn_2O_4$ is employed as a cathode active material, binary conductive agents were prepared using two different particle-sized carbons like Super P Black and $Vulcan^{(R)}$ XC-72R. The electrochemical performances of the $LiMn_2O_4$ cell system using binary conductive agents were evaluated in terms of specific charge and discharge capacities and cycle life. The cell with binary conductive agent in the 3:7 weight ratios of Super P Black and $Vulcan^{(R)}$ XC-72R showed better electrochemical performances due to the proper combination of ionic diffusion rate and electric contact.

Acknowledgement

Supported by : 차세대전지 성장동력 사업단

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