• Electrical Properties of Terpolymer-Based Polymer Electrolytes and Electrochemical Performance of Li/LiNi0.83Co0.17O2 Cell
  • Kim DW
  • 삼원 공중합체계 고분자 전해질의 전기적 특성과 이들을 이용한 Li/LiNi0.83Co0.17O2 전지의 충·방전 특성에 관한 연구
  • 김동원
Abstract
The new polymer electrolytes composed of acrylonitrile-methyl methacrylate-styrene(AMS) terpolymer, 1 M LiClO4-EC/PC and inorganic filler were prepared, and their electrochemical characteristics were investigated. Depending on the molar composition of terpolymers, these polymer electrolytes exhibit a wide range of mechanical and electrical properties. The ionic conductivity reaches 1.4 x 10-3S/cm in the polymer electrolyte containing 27 wt% of AMS terpolymer, 64 wt% of LiClO4-EC/PC and 9 wt% of silica at room temperature to give free standing films which exhibit good mechanical properties. The Li/SPE/LiNi0.83 Co0.17 O2 solid-state cell employing AMS-based polymer electrolyte showed an initial capacity of 186 mAh/g in the voltage range of 3.0-4.2V. The discharge capacity remained 156 mAh/g at 100th cycle. which was 84% of initial capacity.

아크릴로니트릴-메틸 메타크릴레이트-스티렌 삼원 공중합체, 전해액, 무기 충진물로 구성되는 고분자 전해질을 제조하여, 이들의 전기화학적 특성을 조사하였다. 이들 고분자 전해질의 기계적, 전기적 특성은 삼원 공중합체의 조성에 크게 의존하는 것으로 관찰되었다. 고분자, 전해액, 실리카를 27:64:9의 중량비로 포함하는 고분자 전해질은 핸들링이 가능한 필름으로 얻어졌으며, 상온에서의 이온 전도도는 1.4 x 10-3S/cm이었다. Li/SPE/LiNi0.83Co0.17O2로 구성되는 단위 전지를 제작하여 충·방전 실험을 수행한 결과, 186 mAh/g의 높은 용량을 나타내었으며, 100회 싸이클 후 전지 용량은 156mAh/g을 나타내어 초기 용량의 84%를 유지하였다.

Keywords: electrochemical property; lithium polymer battery; polymer electrolyte; terpolymer

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2024 Impact Factor : 0.6
  • Indexed in SCIE

This Article

  • 1998; 22(3): 478-484

    Published online May 25, 1998