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Received May 27, 2005
Accepted September 27, 2005
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(La0.8Sr0.2)0.95MnO3/Yttria Stabilized Zirconia 복합체 전극을 이용한 고온 수증기 전기분해 연구
A Study on the High Temperature Steam Electrolysis Using (La0.8Sr0.2)0.95MnO3/Yttria Stabilized Zirconia Composite Electrodes
충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220 1한국에너지기술연구원 수소제조연구센터, 305-343 대전시 유성구 장동 71-2
Department of Chemical Engineering, Chung-nam National University, 220, Gung-dong, Yusung-gu, Daejeon 305-764, Korea 1Hydrogen Production Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea
kssim@kier.re.kr
Korean Chemical Engineering Research, October 2005, 43(5), 627-631(5), NONE Epub 2 November 2005
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Abstract
고온수증기 전기분해의 양극물질로 이용될 수 있는 (La0.8Sr0.2)0.95MnO3/yttria-stabilized zirconia(LSM/YSZ) 복합체 전극을 x-ray diffractometry, scanning electron microscopy 그리고 galvanodynamic, galvanostatic polarization method 로 연구하였다. 이런 목적으로 perovskite-type의 LSM 물질은 공침법을 이용하여 제조하였으며, 8 mol％ YSZ와 몰분 율을 달리하여 복합체 전극을 합성하였다. LSM/YSZ 복합체 전극은 평판의 YSZ 전해질에 LSM/YSZ 복합체를 스크린 프린팅 후 1,100 ℃에서 열처리 코팅하여 제조하였다. 실험결과로부터 LSM/YSZ 복합체 전극의 전기화학적 특성 은 전극을 이루는 삼상계면의 구조와 전기분해 온도에 영향을 받는다는 것을 확인하였다.
The (La0.8Sr0.2)0.95MnO3/yttria-stabilized zirconia (LSM/YSZ) composites were investigated as anode materials for high temperature steam electrolysis using X-ray diffractometry, scanning electron microscopy, galvanodynamic and galvanostatic polarization method. For this purpose, the LSMperovskites were fabricated in powders by co-precipitation method and then were mixed with 8 mol％ YSZ powders in different molar ratios. The LSM/YSZ composites were deposited on 8 mol％ YSZ electrolyte disks by means of a screen printing method, followed by sintering at temperatures above 1,100 ℃. From the experimental results, it is concluded that the electrochemical properties of LSM and the LSM/YSZ composites are closely related to their microstructure and operating temperatures.
Keywords
References
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Chae US, Park KM, Seon HH, Choo ST, Yun YS, Trans. Korean Hydrogen New Energy Soc., 15(2), 98 (2004)
Hino R, Haga K, Aita H, Sekita K, Nucl. Eng. Des., 233, 363 (2004)
Wendt H, Electrochemical Hydrogen Technologies(Electrochemical Production and Combustion of Hydrogen), 1rd ed, Elsevier Science Publishing Company, New York, NY (1990)
Sahu AK, Ghosh A, Suri AK, Sengupta P, Bhanumurthy K, Mater. Lett., 58, 3332 (2004)
Marinkovic ZV, Mancic L, Cribier JF, Ohara S, Fukui T, Milosevic O, Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process., 375, 615 (2004)
Ji Y, Kilner JA, Carolan MF, Solid State Ion., 176(9-10), 937 (2005)
Hayashi K, Yamamoto O, Nishigaki Y, Minoura H, Solid State Ion., 98(1-2), 49 (1997)
Barbucci A, Bozzo R, Cerisola G, Costamagna P, Electrochim. Acta, 47(13-14), 2183 (2002)
Wang S, Jiang Y, Zhang Y, Yan J, Li W, Solid State Ion., 113, 291 (1998)
Lee HY, Oh SM, Solid State Ion., 90(1-4), 133 (1996)
Jorgensen MJ, Primdahl S, Bagger C, Mogensen M, Solid State Ion., 139(1-2), 1 (2001)
Chen F, Liu M, J. European Ceram. Soc., 21, 127 (2001)
Jiang SP, Love JG, Zhang JP, Hoang M, Ramprakash Y, Hughes AE, Badwal SPS, Solid State Ion., 121(1-4), 1 (1999)
Choi JH, Jang JH, Oh SM, Electrochim. Acta, 46(6), 867 (2001)
Kim JD, Kim GD, Moon JW, Park YI, Lee WH, Kobayashi K, Nagai M, Kim CE, Solid State Ion., 143(3-4), 379 (2001)
Mitterdorfer A, Gauckler LJ, Solid State Ion., 11, 185 (1998)
Lee S, Lee KS, Woo SK, Kim JW, Ishihara T, Kim DK, Solid State Ion., 158(3-4), 287 (2003)
