Universal Correlation between Cathode Roughness Factor and H2/Air Performance Losses in Voltage Cycling-Based Accelerated Stress Tests

被引:45
作者
Della Bella, Roberta K. F.
Stuehmeier, Bjoern M. [1 ]
Gasteiger, Hubert A.
机构
[1] Tech Univ Munich, Dept Chem, Chair Tech Electrochem, D-85748 Garching, Germany
关键词
PEM FUEL-CELLS; OXYGEN REDUCTION REACTION; ACTIVE SURFACE-AREA; TO-CARBON RATIO; POLYMER-ELECTROLYTE; CATALYST DEGRADATION; PT/C CATALYST; ELECTROCHEMICAL IMPEDANCE; STRUCTURAL PARAMETERS; PARTICLE-SIZE;
D O I
10.1149/1945-7111/ac67b8
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The loss of electrochemically active surface area (ECSA) in the cathode during load cycling remains a major durability issue for proton exchange membrane fuel cells (PEMFCs). Here, the degradation of low-loaded cathodes (0.1 mg(Pt) cm(MEA)(-2)) was investigated by accelerated stress tests (ASTs) in H-2/N-2 configuration, varying the upper potential limit (UPL, 0.85-1.0 V) and the hold time (1, 2, or 8 s) of the square wave voltage cycling profiles. A full voltage loss analysis was performed at beginning-of-life and after 100, 300, 1 k, 2 k, 5 k, 10 k, 20 k, 50 k, 100 k, 200 k, and 500 k cycles, determining: (i) the roughness factor (rf) via CO-stripping; (ii) the H-2-crossover; (iii) the cathode electrode's proton conduction resistance; (iv) the H-2/O-2 and H-2/air performance; and, (v) the O-2 transport resistance. It was found that the ECSAltf deteriorates linearly vs the logarithm of the number of cycles or time at UPL, with higher slopes for harsher ASTs. The individual voltage losses were found to be either unaffected by the aging (H-2-crossover and proton conduction resistance) or depend exclusively on the cathode rf (mass/specific activity and O-2 transport resistances), independent of the AST procedure. This results in a universal correlation between H-2/air performance and rf during voltage cycling ASTs. (C) 2022 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited.
引用
收藏
页数:16
相关论文
共 85 条
[1]   Achieving 5,000-h and 8,000-h Low-PGM Electrode Durability on Automotive Drive Cycles [J].
Ahluwalia, R. K. ;
Wang, X. ;
Peng, J-K ;
Konduru, V. ;
Arisetty, S. ;
Ramaswamy, N. ;
Kumaraguru, S. .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2021, 168 (04)
[2]   Structural parameters of supported fuel cell catalysts: The effect of particle size, inter-particle distance and metal loading on catalytic activity and fuel cell performance [J].
Antolini, Ermete .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2016, 181 :298-313
[3]   Measurement of Oxygen Transport Resistance in PEM Fuel Cells by Limiting Current Methods [J].
Baker, Daniel R. ;
Caulk, David A. ;
Neyerlin, Kenneth C. ;
Murphy, Michael W. .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2009, 156 (09) :B991-B1003
[4]   Modeling of PEM fuel cell Pt/C catalyst degradation [J].
Bi, Wu ;
Fuller, Thomas F. .
JOURNAL OF POWER SOURCES, 2008, 178 (01) :188-196
[5]   Temperature effects on PEM fuel cells Pt/C catalyst degradation [J].
Bi, Wu ;
Fuller, Thomas. F. .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2008, 155 (02) :B215-B221
[6]   The effect of humidity and oxygen partial pressure on degradation of Pt/C catalyst in PEM fuel cell [J].
Bi, Wu ;
Sun, Qunhui ;
Deng, Win ;
Fuller, Thomas F. .
ELECTROCHIMICA ACTA, 2009, 54 (06) :1826-1833
[7]   Recent developments in catalyst -related PEM fuel cell durability [J].
Borup, Rodney L. ;
Kusoglu, Ahmet ;
Neyerlin, Kenneth C. ;
Mukundan, Rangachary ;
Ahluwalia, Rajesh K. ;
Cullen, David A. ;
More, Karren L. ;
Weber, Adam Z. ;
Myers, Deborah J. .
CURRENT OPINION IN ELECTROCHEMISTRY, 2020, 21 :192-200
[8]  
Carter R.N., 2007, ECS T, V11, P403, DOI [10.1149/1.2780954, DOI 10.1149/1.2780954]
[9]   Heat and Water Transport in Hydrophobic Diffusion Media of PEM Fuel Cells [J].
Caulk, David A. ;
Baker, Daniel R. .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2010, 157 (08) :B1237-B1244
[10]   Degradation of polymer electrolyte membranes [J].
Collier, Amanda ;
Wang, Haijiang ;
Yuan, Xiao Zi ;
Zhang, Jiujun ;
Wilkinson, David P. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2006, 31 (13) :1838-1854