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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Preparation and Characteristics of Li/$V_6O_{13}$ Secondary Battery

Li/$V_6O_{13}$ 2차전지의 제조 및 특성

  • Moon, S.I. (Electrical Materials Div. Korea Electrotechnology Research Institute) ;
  • Jeong, E.D. (Electrical Materials Div. Korea Electrotechnology Research Institute) ;
  • Doh, C.H. (Electrical Materials Div. Korea Electrotechnology Research Institute) ;
  • Yun, M.S. (Electrical Materials Div. Korea Electrotechnology Research Institute) ;
  • Yum, D.H. (Battery R&D Div. Battery Plant, STC Corporation) ;
  • Chung, M.Y. (Battery R&D Div. Battery Plant, STC Corporation) ;
  • Park, C.J. (Battery R&D Div. Battery Plant, STC Corporation) ;
  • Youn, S.K. (Battery R&D Div. Battery Plant, STC Corporation)
  • 문성인 (한국전기연구소 전기재료연구부) ;
  • 정의덕 (한국전기연구소 전기재료연구부) ;
  • 도칠훈 (한국전기연구소 전기재료연구부) ;
  • 윤문수 (한국전기연구소 전기재료연구부) ;
  • 염덕형 (서통(주) 전지공장 전지개발부) ;
  • 정목윤 (서통(주) 전지공장 전지개발부) ;
  • 박천준 (서통(주) 전지공장 전지개발부) ;
  • 윤성규 (서통(주) 전지공장 전지개발부)
  • Published : 1992.11.07
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Abstract

The purpose of this research is to develop the lithium secondary battery. This paper describes the preparation, electrochemical properties of nontstoichiometric(NS)-$V_6O_{13}$ and characteristics of Li/$V_6O_{13}$ secondary battery. NS-$V_6O_{13}$ was prepared by thermal decomposition of $NH_4VO_3$ under Ar stream of 140ml/min~180ml/min flow rate. And then, this NS-$V_6O_{13}$ was used for cathode active material. Cathode sheet was prepared by compressing the composite of NS-$V_6O_{13}$, acetylene black(A.B) and teflon emulsion (T.E). Characteristics of the test cell are summarised as follows. Oxidation capacity of NS-$V_6O_{13}$ was about 20% less than its reduction capacity. A part of NS-$V_6O_{13}$ cathode active material showed irreversible reaction in early charge-discharge cycle. This phenomena seems to be caused by irreversible incoporation/discoporation of lithium cation to/from NS-$V_6O_{13}$ host. Discharge characteristics curve of Li/$V_6O_{13}$ cell showed 4 potential plateaus. Charge-discharge capacity was declined in the beginning of cycling and slowly increased in company with increasing of coulombic efficiency. Energy density per weight of $V_6O_{13}$ cathode material was as high as 522Wh/kg~765Wh/kg.

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