• Phase Transition and Ionic Conductivity of Cesium Hydrogen Sulfate-PAN Composites
  • Choi BK, Park SH
  • 황산수소 세슘-PAN 복합체의 상전이와 이온 전도성
  • 최병구, 박상희
Abstract
The cesium hydrogen sulfate (CsHSO4) crystal is a superprotonic conductor above 140 ℃ and possesses protonic conductivity three to four orders of magnitude higher than that at room temperature. Recently, the possibility of it as an electrolyte material for fuel cell system draws much attention. However, its plasticity and absorption of humidity place a limitation on its application. In this study, composites consisting of CsHSO4 and polyacrylonitrile were prepared, and their phase transition properties and the ionic conductivities were evaluated. When the content of CsHSO4 was about 80 vol%, a mechanically strong film with the protonic conductivity of 1 × 10-3Scm-1were made.

황산수소 세슘 (CsHSO4)결정은 140 ℃ 이상의 온도에서 상온보다 103-104배 높은 양성자 전도성을 나타내는 초양성자 전도성 물질로서, 최근 연료 전지 분리막으로의 응용성이 크게 부각되고 있다. 그러나 연성과 흡습성 때문에 그 응용성에 한계가 있다. 본 연구에서는 기계적 물성이 우수한 얇은 전해질 막을 얻기 위하여 황산수소 세슘과 폴리아크릴로나이트릴 고분자와의 복합체를 제조하고 복합체의 이온 전도성과 상전이 현상을 조사하였다. 황산수소 세슘의 함량이 80 vol% 정도 되면 분리막으로 응용가능한 전도도인 1 × 10-3Scm-1에 이르고 기계적 물성이 우수한 얇은 막으로 합성할 수 있었다.

Keywords: cesium hydrogen sulfate (CsHSO4); polyacrylonitrile; ionic conductivity; superprotonic conductor; electrolytes

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  • Polymer(Korea) 폴리머
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    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
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This Article

  • 2004; 28(2): 149-153

    Published online Mar 25, 2004

  • Received on Oct 11, 2003
  • Accepted on Feb 10, 2004