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Received January 20, 2019
Accepted March 26, 2019
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고분자전해질 연료전지에서 고분자막을 통한 물의 이동
Transport of Water through Polymer Membrane in Proton Exchange Membrane Fuel Cells
순천대학교 화학공학과, 57922 전남 순천시 매곡동 315 1큐슈대학교 공학대학원, 819-0395 후쿠오카 후쿠오카시 니시구 모토카 744 2자동차부품연구원, 31214 충청남도 천안시 동남구 풍세면 풍세로 303
Department of Chemical Engineering, Sunchon National University, 315, Maegok-dong, Suncheon, Jeonnam, 57922, Korea 1Graduate School of Engineering, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka-shi, Fukuoka, 819-0395, Japan 2KATECH, 303, Pungse-ro, Pungse-myeon, Dongnam-gu, Cheonan-si, Chungcheongnam-do, 31214, Korea
parkkp@sunchon.ac.kr
Korean Chemical Engineering Research, June 2019, 57(3), 338-343(6), 10.9713/kcer.2019.57.3.338 Epub 3 June 2019
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Abstract
고분자전해질 연료전지에서 전해질막의 물이동과 함수율은 고분자막의 성능에 많은 영향을 미친다. 본 연구에서는 간단한 방법에 의해 물이동에 관한 고분자막의 물성(전기삼투계수, 물 확산계수)을 측정하고 이들을 이용해 막을 통한 물의 이동량과 이온전도도를 모델식에 의해 모사한 후 실험값과 비교하였다. 물이동의 구동력은 전기삼투와 확산만이라고 본 1차원 정상상태 지배방정식을 매트랩으로 수치해석하였다. 144 μm 두께의 고분자막의 전기삼투계수를 수소 펌핑셀에서 구한 결과 1.11을 얻었다. 물확산계수를 상대습도의 함수로 나타냈고 물확산에 대한 활성화에너지는 2,889kJ/mol.K였다. 이들 계수를 적용해 모사한 물이동량과 이온전도도 결과는 실험값과 잘 일치함을 보였다.
The water transport and water content of the electrolyte membrane greatly affect the performance of the membrane in PEMFC(Proton Exchange Membrane Fuel Cell). In this study, the parameters (electroosmotic coefficient, water diffusion coefficient) of polymer membranes for water transport were measured by a simple method, and water flux and ion conductivity were simulated by using a model equation. One dimensional steady state model equation was constructed by using only the electro-osmosis and diffusion as the driving force of water transport. The governing equations were simulated with MATLAB. The electro-osmotic coefficient of 144 μm thick polymer membranes was measured in hydrogen pumping cell, the value was 1.11. The water diffusion coefficient was expressed as a function of relative humidity and the activation energy for water diffusion was 2,889 kJ/mol.K. The water flux and ion conductivity results simulated by applying these coefficients showed good agreement with the experimental data.
Keywords
References
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Zawodzinski TA, Neeman M, Sillerud LO, Gottesfeld S, J. Phys. Chem., 95, 6040 (1991)
Fuller T, Newman J, J. Electrochem. Soc., 140(5), 1218 (1993)
Motupally S, Becker AJ, Weidner JW, J. Electrochem. Soc., 147(9), 3171 (2000)
Karpenko-Jereb L, Innerwinkler P, Kelterer AM, Sternig C, Fink C, Prenninger P, Tatschl R, Int. J. Hydrog. Energy, 39(13), 7077 (2014)
Hsu WY, Gierke TD, J. Membr. Sci., 13, 307 (1983)
Fimrite J, Struchtrup H, Djilali N, J. Electrochem. Soc., 152, 1804 (2005)
Cwirko EH, Carbonell RG, J. Membr. Sci., 48, 155 (1990)
Zabolotsky VI, Nikonenko VV, J. Membr. Sci., 79, 181 (1993)
Berezina NP, Karpenko LV, Colloid J., 62, 676 (2000)
Carnes B, Djilali N, Electrochim Acta, 52, 1038 (2006)
Berg P, Promislow K, Pierre J, Stumper J, Wetton B, J. Electrochem. Soc., 151, 341 (2004)
Kulikovsky AA, Electrochim Acta, 49, 5187 (2004)
Hwang B, Chung HB, Lee MS, Lee DH, Park K, Korean Chem. Eng. Res., 54(5), 593 (2016)
Ye XH, Wang CY, J. Electrochem. Soc., 154(7), B676 (2007)
Ju HC, Wang CY, Cleghorn S, Beuscher U, J. Electrochem. Soc., 152(8), A1645 (2005)
Zawodzinski TA, Springer TE, Davey J, Jestel R, Lopez C, Valerio J, Gottesfeld S, J. Electrochem. Soc., 140, 1981 (1993)
Nguyen TV, White RE, J. Electrochemical Soc., 140(8), 2178 (1993)
Hwang BC, Oh SH, Lee MS, Lee DH, Park KP, Korean J. Chem. Eng., 35(11), 2290 (2018)
