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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Ion Conduction Properties of PMMA/PVDF based Polymer Electrolyte for Lithium Polymer Battery

리튬 폴리머전지용 PMMA/PVDF계 고분자 전해질의 이온 전도 특성

  • 이재안 (전남대학교 전기공학과) ;
  • 김종욱 (전남대학교 전기공학과) ;
  • 구할본 (전남대학교 전기공학과) ;
  • 이헌수 (대구공업대학 세라믹공학과) ;
  • 손명모 (대구공업대학 세라믹공학과)
  • Published : 2000.11.01
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Abstract

The purpose of this study is to research and develop solid polymer electrolyte(SPE) for Li polymer battery. The temperature dependence of conductivity, impedance spectroscopy and electrochemical properties of PMMA/PVDF electrolytes as a function of a mixed ratio were reported for PMMA/PVDF based polymer electrolyte films, which were prepared by thermal gellification method of preweighed PMMA/PVDF, plasticizer and Li salt. The ion conductivity of PMMA/PVDF electrolytes was 10$\^$-3/S/cm, which may be applicable to a constituent of lithium secondary battery. 5PMMA20PVDFLiC1O$_4$PC$\sub$8/EC$\sub$8/ electrolyte remains stable up to 5V vs. Li/Li$\^$+/. Steady state current method and AC impedance were used for the determination of transference numbers in PMMA/PVDF electrolyte film. The transference number of 5PMMA20PVDFLiC1O$_4$PC$\sub$8/EC$\sub$8/ electrolyte is 0.55.

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