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기공형성제 Li2CO3 및 Hot Coating법을 이용한 고분자 전해질 연료전지용 고성능 전극의 제조
Fabrication of High Performance Electrode for PEMFCs Using Pore Former Li2CO3 and Hot Coating Method
연세대학교 화학공학과, 서울 120-749
Dept. of Chemical Engineering, Yonsei University, 134 Shinchon-Dong, Sudaemoon-Ku, Seoul 120-749, Korea
HWAHAK KONGHAK, February 2001, 39(1), 103-108(6), NONE
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Abstract
고분자 전해질 연료전지의 단위전지 운전시 성능저하의 원인이 되는 분극현상의 영향을 최소화하는 고성능의 기체확산전극을 제조하였다. 기공형성제 Li2CO3의 첨가와 350℃의 열처리 공정을 통하여 기체투과층 내부에 이중 기공구조를 형성시킨 결과, 고전류밀도 영역에서 전압강하가 크게 감소하였으며, hot coating법을 사용하여 PTEE와 글리세린을 첨가하지 않고 Pt/C와 Nafion 용액만으로 촉매층을 제조함으로써 백금촉매의 이용률이 크게 향상되었다. 수소/산소 단위전지 시스템을 구성하고 성능실험을 수행한 결과, 20wt% Pt/C(0.4mg Pt/cm2)와 Nafion115 막을 사용하고 75℃에서 무가압 운전했을 때, 0.7V의 셀 전압에서 517mA/cm2의 전류밀도를 얻었으며, 0.5V에서 0.52W/cm2의 최대전력밀도를 나타내었다.
New fabrication method of gas diffusion electrodes for PEM fuel cells was developed to minimize the effect of polarization that causes the decrease of cell performance. The cell voltage drop in the high current density region was significantly decreased by the influence of the bimodal pore structure of gas diffusion layer which is established through pore former, Li2CO3 and heat treatment at 350℃. Pt/C utilization was improved by using hot coating method for catalyst layer that doesn't include PTFE and glycerin. In H2/O2 single cell system at 75℃ and 1 atm, best performance of 517 mA/cm(2) at 0.7V and 0.52 W/cm(2) at 0.5V has been obtained with Nafion 115 membrane and 20 wt% Pt/C(0.4 mg/cm(2)) loaded electrode assembly.
References
Ward CA, Garcia JA, J. Power Sources, 66, 83 (1997)
Passalacqua E, Lufrano F, Squadrito G, Patti A, Giorgi L, Electrochim. Acta, 43(24), 3665 (1998)
Lufrano F, Passalacqua E, Squadrito G, Patti A, Giorgi L, J. Appl. Electrochem., 29(4), 445 (1999)
Voss HH, Wilkinson DP, Pickup PG, Johnson MC, Basura V, Electrochim. Acta, 40(3), 321 (1995)
Nguyen TV, J. Electrochem. Soc., 143(5), L103 (1996)
Wood DL, Yi YS, Nguyen TV, Electrochim. Acta, 43(24), 3795 (1998)
Giorgi L, Antolini E, Pozio A, Passalacqua E, Electrochim. Acta, 43(24), 3675 (1998)
Shin CS, Lee KD, Lee SJ, Lee TH, HWAHAK KONGHAK, 36(3), 387 (1998)
Fischer A, Jindra J, Wendt H, J. Appl. Electrochem., 28(3), 277 (1998)
Paganin VA, Ticianelli EA, Gonzalez ER, J. Appl. Electrochem., 26(3), 297 (1996)
Escribano S, Aldebert P, Pineri M, Electrochim. Acta, 43(14), 2195 (1998)
Wilson MS, Gottesfeld S, J. Electrochem. Soc., 139, L28 (1992)
Chun YG, Kim CS, Peck DH, Shin DR, J. Power Sources, 71(1-2), 174 (1998)
Cheng XL, Yi BL, Han M, Zhang JX, Qiao YG, Yu JR, J. Power Sources, 79(1), 75 (1999)
Kumar GS, Raja M, Parthasarathy S, Electrochim. Acta, 40(3), 285 (1995)
Wilson MS, Valerio JA, Gottesfeld S, Electrochim. Acta, 40(3), 355 (1995)
Passalacqua E, Lufrano F, Squadrito G, Patti A, Giorgi L, Electrochim. Acta, 43(24), 3665 (1998)
Lufrano F, Passalacqua E, Squadrito G, Patti A, Giorgi L, J. Appl. Electrochem., 29(4), 445 (1999)
Voss HH, Wilkinson DP, Pickup PG, Johnson MC, Basura V, Electrochim. Acta, 40(3), 321 (1995)
Nguyen TV, J. Electrochem. Soc., 143(5), L103 (1996)
Wood DL, Yi YS, Nguyen TV, Electrochim. Acta, 43(24), 3795 (1998)
Giorgi L, Antolini E, Pozio A, Passalacqua E, Electrochim. Acta, 43(24), 3675 (1998)
Shin CS, Lee KD, Lee SJ, Lee TH, HWAHAK KONGHAK, 36(3), 387 (1998)
Fischer A, Jindra J, Wendt H, J. Appl. Electrochem., 28(3), 277 (1998)
Paganin VA, Ticianelli EA, Gonzalez ER, J. Appl. Electrochem., 26(3), 297 (1996)
Escribano S, Aldebert P, Pineri M, Electrochim. Acta, 43(14), 2195 (1998)
Wilson MS, Gottesfeld S, J. Electrochem. Soc., 139, L28 (1992)
Chun YG, Kim CS, Peck DH, Shin DR, J. Power Sources, 71(1-2), 174 (1998)
Cheng XL, Yi BL, Han M, Zhang JX, Qiao YG, Yu JR, J. Power Sources, 79(1), 75 (1999)
Kumar GS, Raja M, Parthasarathy S, Electrochim. Acta, 40(3), 285 (1995)
Wilson MS, Valerio JA, Gottesfeld S, Electrochim. Acta, 40(3), 355 (1995)
