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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
권호 표지

Charge-discharge Characteristics of $LiCoO_2/Li$ Rechargeable Cell

$LiCoO_2/Li$ 2차전지의 충방전 특성

  • Moon, S.I. (Korea Electrotechnology Research Institute) ;
  • Doh, C.H. (Korea Electrotechnology Research Institute) ;
  • Jeong, E.D. (Korea Electrotechnology Research Institute) ;
  • Kim, B.S. (Korea Electrotechnology Research Institute) ;
  • Park, D.W. (Korea Electrotechnology Research Institute) ;
  • Yun, M.S. (Korea Electrotechnology Research Institute) ;
  • Yeom, D.H. (STC Research Institute of Battery Technology) ;
  • Jeong, M.Y. (STC Research Institute of Battery Technology) ;
  • Park, C.J. (STC Research Institute of Battery Technology) ;
  • Yun, S.K. (STC Research Institute of Battery Technology)
  • 문성인 (한국전기연구소 전기재료연구부) ;
  • 도칠훈 (한국전기연구소 전기재료연구부) ;
  • 정의덕 (한국전기연구소 전기재료연구부) ;
  • 김봉서 (한국전기연구소 전기재료연구부) ;
  • 박대욱 (한국전기연구소 전기재료연구부) ;
  • 윤문수 (한국전기연구소 전기재료연구부) ;
  • 염덕형 ((주)서통 전지기술연구소) ;
  • 정목윤 ((주)서통 전지기술연구소) ;
  • 박천준 ((주)서통 전지기술연구소) ;
  • 윤성규 ((주)서통 전지기술연구소)
  • Published : 1993.05.15
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Abstract

This paper describes the development of lithium rechargeable cell. $LiCoO_2$ is recently recognized as a suitable cathode active material of a high voltage, high energy lithium rechargeable batteries because $Li^+$ ion can be electrochemically deintercalated/intercalated from/to $Li_xCoO_2$. The transition metal oxide of $LiCoO_2$ was investigated for using as a cathode active material of 4V class Li rechargeable cell. $LiCoO_2$ cathode was prepared by using a active material of 85 wt%, graphite powder of 12 wt% as a conductor and poly-vinylidene fluoride of 3 wt% as a binder. The electrochemical and charge/discharge properties of $LiCoO_2$ were investigated by cyclic voltammetry and galvanostatic charge/discharge. The open circuit voltage of prepared $LiCoO_2$ electrode exhibited approximately. potential range between 3.32V and 3.42V. During the galvanostatic charge/discharge, $LiCoO_2/Li$ cell showed stable cycling behavior at scan rate of 1mV/sec and potential range between 3.6V and 4.2V. Also its coulombic efficiency as function of cycling was 81%~102%. In this study the $LiCoO_2/Li$ cell showed the available discharge capacity of 90.1 mAh/g at current density of $1mA/cm^2$ and cell discharge voltage range between 3.6V~4.2V.

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