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A Study on Optimization of Manufacturing Condition for LiNi1/3Mn1/3Co1/3O2-based Cathode Electrode

LiNi1/3Mn1/3Co1/3O2계 정극활물질을 적용한 전극 제조조건 최적화 연구

  • 김현수 (한국전기연구원 전지연구그룹) ;
  • 김성일 (한국전기연구원 전지연구그룹) ;
  • 이창우 (한국전기연구원 전지연구그룹) ;
  • 문성인 (한국전기연구원 전지연구그룹) ;
  • 김우성 (대정화금(주) 기술연구소)
  • Published : 2006.02.01

Abstract

A fabrication condition of the cathode electrode was optimized in a lithium secondary battery. The $LiNi_{1/3}Mn_{1/3}Co_{1/3}O_2$ powders were used as a cathode material. The $LiNi_{1/3}Mn_{1/3}Co_{1/3}O_2$/Li cells were prepared with a certain formulation and their cycleability and rate-capability were evaluated. Optimum electrode composition simulated from the evaluated value was 86.3: 5.6: 8.1 in mass $\%$ of active material: binder: conducting material. Discharge capacity decreased markedly as the press ratio exceeded $30\%$ during preparation of the electrode. Discharge performance at a high current rate deteriorated abruptly as the electrode thickness was over $120{\mu}m$.

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