Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
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Electrochemical Characteristics of Electrolyte Membrane for Hydrogen Production in High Temperature Electrolysis

고온 수증기 전해 수소제조를 위한 전해질 막의 전기화학적 특성 고찰

  • Choi Ho-Sang (Laboratory of Membrane Separation Process, Dept. of Chem. Eng., Kyungil University) ;
  • Son Hyo-Seok (Laboratory of Membrane Separation Process, Dept. of Chem. Eng., Kyungil University) ;
  • Sim Kyu-Sung (Hydrogen Production Research Center, Korea Institute of Energy Research) ;
  • Hwang Gab-Jin (Hydrogen Production Research Center, Korea Institute of Energy Research)
  • 최호상 (경일대학교 생명화학공학과) ;
  • 손효석 (경일대학교 생명화학공학과) ;
  • 심규성 (한국에너지기술연구원 수소에너지연구센터) ;
  • 황갑진 (한국에너지기술연구원 수소에너지연구센터)
  • Published : 2005.12.01
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Abstract

YSZ (yttria-stabilized zirconia) determined with an electrolyte that analyzed thermal stability along sintering condition and an electric characteristic. As sintering temperature increases by SEM, grain grows and it showed that pore decreases relatively. and confirmed effect by grain size. It evaluated that particle internal resistance and electric performance by resistance in an electrolyte and electricity conductivity measurement through ac impedance measurement in temperature of $800\~1000^{\circ}C$ in 2-probe method In order to recognize an electric characteristic. In dry process and wet process, density was each 6.13, 6.25 $g/cm^3$ and the relative density was each 98, 99$\%$ when sintering condition is $1400^{\circ}C$.

이트리아 안정화 지르코니아(yttria stabilized zirconia, YSZ)를 전해질로 선정하여 소결조건에 따른 열적 안정성과 전기적인 특성을 분석하였다. SEM사진으로 소결온도가 증가할수록 입자가 커지므로 상대적으로 기공은 줄어드는 것을 보였고 입자크기에 따른 영향을 확인하였다. 전기적 특성을 알아보고자 2단자법(2-probe method)으로 $800\~1000^{\circ}C$의 오도에서 교류 임피던스 측정을 통하여 전해질 내의 저항과 전기전도도 측정으로 입자 내부 저항 및 전기적 성능을 평가하였다. 소결온도가 $1400^{\circ}C$일 때 건식법과 습식법에서 밀도는 각각 6.13, 6.25 $g/cm^3$이며, 상대밀도는 각각 98, 99$\%$였다. 소결온도가 올라갈수록 저항은 낮아지고, 전도도는 커지는 것을 확인할 수 있으며, 건식 및 습식법으로 제작한 전해질의 전기전도도는 $10000^{\circ}C$에서 각각 $8.8\times10^{-2},\;11\times10^{-2}$ S/cm이었다.

Keywords

References

  1. 홍현선, 추수태, 윤용승: '고온 수전해에 의한 수소 제조 기술', 한국수소 및 신에너지 학회 논문집, 14(4), 335-347 (2003)
  2. 채의석, 박근만, 홍현선, 추수태, 윤용승, '고온 수전해 전극용 modified NilYSZ cermet 제조 및 전극 특성', 한국수소에너지학회 논문집, 15(2), 98-107 (2004)
  3. W. Donitz and E. Erdle, 'High-temperature Electrolysis of Water Vapor-status of Development and Perspectives for Application', Int. J Hydrogen Energy, 10, 801 (1985)
  4. W. Donitz, G. Dietrich, E. Erdle and R. Streicher, 'Electrochemical high Temperature Technology for hydrogen Production or Direct Electricity Generation', Int. J. Hydrogen Energy, 13, 283 (1988)
  5. Tetsuro Kobayashi, Katsushi Abe, Yoshio Ukyo, and Hiroshige Matsumoto, 'Study on current efficiency of steam electrolysis using a partial protonic conduct $SrZr_{0.9}Yb_{0.1}O_{3-{\alpha}}$ ', Solid State Ionics, 138, 243-251 (2001) https://doi.org/10.1016/S0167-2738(00)00793-1
  6. Ui-Seok Chae, Keun-Man Park, Hong-Hyun Seon, Soo- Tae Choo, and Yong-seung Yun, 'Preparation and characteristics of modified Ni/YSZ cermet for high temperature electrolysis' Trans. of the Korean Hydrogen and New Energy Society 15(2), 98-107 (2004)
  7. R. Hino, Katsuhiro Haga, Hideki Aita, and Kenji Sekita, 'R&D on hydrogen production by high-temperature electrolysis of steam', Nuclear Engineering and Design 233, 363-375 (2004) https://doi.org/10.1016/j.nucengdes.2004.08.029
  8. 최호상, 손효석, 심규성, 황갑진: '고온 수전해 전해질 막의 열안정화 특성 고찰', 한국수소 및 신에너지학회 논문집, 16(2), 150-158 (2005)
  9. A. K. Maiti and B. Rajender, 'Terpineol as a dispersant for tape casting yttria stabilized zirconia powder', Materials science and Engineering A, 333, 35-40 (2002) https://doi.org/10.1016/S0921-5093(01)01821-4
  10. L. Dessemond, J. Guindet, F. Grosz, and P. Zegers: Proceedings of the 2nd International Symposium on SOFC, brussels, Belgium, P. 409 (1991)
  11. A. P. Santos, R. Z. Domingues, and M. Kleitz, 'Grain Boundary Blocking Effect in Tetragonal Yttria Stabilized Zirconia', Journal of the european Ceramic Society, 18, 1571-1578 (1998) https://doi.org/10.1016/S0955-2219(98)00017-X
  12. M. J. Verkerk, B. J. Middelhuis, and A. J. Burggraaf, 'Effect of grain boundaries on the conductivity of high-purity $ZrO_2-Y_2O_3$ ceramics', Solid State lonics, 6, 159-170 (1982) https://doi.org/10.1016/0167-2738(82)90083-2
  13. 윤성필, 현상훈, 김승구, 남석우, 홍성안, '고체산화물 연료전지용 $YSZ/La_{0.85}Sr_{0.35}MnO_3$계 복합전극의 개발', Journal of the Korean Ceramic Society, 36, 982-990 (1999)