Influence Factors of Platinum Dissolution in Proton Exchange Membrane Fuel Cells: A Sensitivity Study

被引:3
|
作者
Stiegeler, Julian [1 ,2 ]
Mittermeier, Thomas [3 ,6 ]
Tsikonis, Leonidas [4 ]
Lehre, Thilo [3 ]
Vierrath, Severin [1 ,2 ,5 ]
机构
[1] Univ Freiburg, Dept Microsyst Engn, Electrochem Energy Syst, IMTEK, D-79110 Freiburg, Germany
[2] Univ Freiburg, Inst FIT Freiburg Ctr Interact Mat & Bioinspired T, D-79110 Freiburg, Germany
[3] Robert Bosch GmbH, Corp Res, D-71272 Renningen, Germany
[4] FPT Motorenforsch AG, CH-9320 Arbon, Switzerland
[5] Hahn Schickard, D-79110 Freiburg, Germany
[6] MTU Aero Engines AG, D-80995 Munich, Germany
关键词
fuel cells - PEM; platinum dissolution; stability; desing of experiment; degradation; sensitivity study; CATHODE CATALYST; DEGRADATION; DURABILITY; LOSSES;
D O I
10.1149/1945-7111/ad45c3
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Polymer electrolyte fuel cells for heavy-duty applications require lifetimes beyond 30,000 h, which poses a durability challenge. In this study, we investigated the influence of various factors on loss of electrochemically active surface area (ECSA) in the cathode, which is a major limiting factor. We derive a parameter range from simulated drive cycles showing that the voltage ranges between 0.70 and 0.85 V and that the cells are in idle state at upper potential limit (UPL) most of the time. We evaluate the influence and interaction of UPL, lower potential limit (LPL), temperature, relative humidity, and cycle time on ECSA and performance at four different operating conditions after 10,000 potential cycles based on 25 experiments. The results indicate that UPL and the hold time at UPL have the strongest impact on degradation, while LPL has a small impact, which does not increase below the potential of full platinum reduction (0.55 V) or hold times longer than 2 s. Furthermore, the interaction of humidity with other factors becomes significant for long experiment times. In summary, the findings of this work can serve as guidelines for minimizing ECSA loss, e.g. by keeping the fuel cell in a benign operation regime via systems control.
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页数:8
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