Polymer(Korea), Vol.28, No.2, 149-153, March, 2004
황산수소 세슘-PAN 복합체의 상전이와 이온 전도성
Phase Transition and Ionic Conductivity of Cesium Hydrogen Sulfate-PAN Composites
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초록
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.
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.
Keywords:cesium hydrogen sulfate (CsHSO4);polyacrylonitrile;ionic conductivity;superprotonic conductor;electrolytes
- Abdelkader MM, Elshawarby A, Housny WM, Eltanahy ZH, Elkabbany F, Mater. Res. Bull., 29(3), 317 (1994)
- Haile SM, Boysen DA, Chisholm CRI, Merle RB, Nature, 410, 910 (2001)
- Norby T, Nature, 410, 877 (2001)
- Komukae M, Osaka T, Makita Y, Ozaki T, Itoh K, Nakamura E, J. Phys. Soc. Jpn., 50, 3187 (1981)
- Baranov AI, Shuvalov LA, Shchagina NM, JETP Lett., 36, 459 (1982)
- Pham-Thi M, Colomban P, Novak A, Blinc R, Solid State Commun., 55, 265 (1985)
- Baranov AI, Sinitsyn VV, Ponyatovskii EG, Shuvalov LA, JETP Lett., 44, 237 (1986)
- Colomban P, Pham-Thi M, Novak A, Solid State Ion., 24, 193 (1987)
- Friesel M, Lunden A, Baranowski B, Solid State Ion., 35, 91 (1989)
- Lunden A, Baranowski B, Friesel M, Ferroelectrics, 124, 103 (1991)
- Synistyn VV, Ponyatovskii EG, Baranov AI, Tregubshenko AV, Schvalov LA, Sov. Phys. JETP, 73, 386 (1991)
- Kirpichnikova L, Polomska M, Wolak J, Hilczer B, Solid State Ion., 97(1-4), 135 (1997)
- Chisholm CRI, Haile SM, Mater. Res. Bull., 35(7), 999 (2000)
- Baran J, Marchewka MK, J. Mol. Structure, 614, 133 (2002)
- Kirpichnikova LF, Urusovskaya AA, Mozgovoi VI, JETP Lett., 62, 638 (1995)
- Urusovskaya AA, Kirpichnikova LF, Crystal. Rep., 43, 307 (1998)
- Chisholm CRI, Haile SM, Solid State Ion., 136-137, 229 (2000)
- Bouattour S, Mhiri T, Kolsi AW, Romain F, Jaud J, J. Phys. Chem. Solids, 62, 1985 (2001)
- Ponomareva VG, Uvarov NF, Lavrova GV, Hairetdinov EF, Solid State Ion., 90(1-4), 161 (1996)
- Ponomareva VG, Lavrova GV, Solid State Ion., 145(1-4), 197 (2001)
- Lee YJ, Choi BK, Polym.(Korea), 22(5), 765 (1998)
- Macdonald JR, Impedance Spectroscopy, John Wiley & Sons, New York (1987)
- Wu J, McLachlan DS, Phys. Rev., B, Condens. Matter, 56, 1236 (1997)
- Zallen R, The Physics of Amorphous Solids, Wiley, New York, Ch. 4 (1983)