Degradation analysis of dead-ended anode PEM fuel cell at the low and high thermal and pressure conditions |
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| Affiliation: | 1. International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, PR China;2. Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33124, USA;1. School of Chemical Machinery, Dalian University of Technology, Dalian 116024, Liaoning, China;2. Fuel Cell System and Engineering Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;3. Sunrise Power Co., Ltd, Dalian 116085, China;4. Graduate University of Chinese Academy of Sciences, Beijing 100049, China;1. Research & Advanced Technology Department, SAIC Motor, No. 201 Anyan Road, Shanghai 201804, PR China;2. College of Chemistry and Materials Science, Hubei Engineering University, No. 272 Jiaotong Road, Xiaogan 432000, PR China;3. School of Automotive Studies, Tongji University, No. 4800 Cao''an Road, Shanghai 201804, PR China;1. School of Automotive Engineering, The State Key Laboratory of Mechanical Transmissions, Chongqing Automotive Collaborative Innovation Centre, Chongqing University, Chongqing, 400044, PR China;2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, PR China;3. School of Mechanical Engineering, Chongqing University of Technology, Chongqing, 400054, PR China;4. Department of Mechanical Engineering, National University of Singapore, 5 Engineering Drive 2, Singapore, 117576;5. Clean Energy Research Center, Temasek Polytechnic, Singapore, 529757;6. Chongqing Changan New Energy Vehicle Technology Co.,Ltd, Chongqing, 400000, PR China |
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| Abstract: | In this study, it is demonstrated that operation of dead-ended anode fuel cell at high temperature and pressure reduce the durability of membrane electrode assembly. In such a way that after 9000 degradation cycles, the maximum power density under H2/O2 gas feed mode for the aged MEA at high temperature and pressure is dropped by 38.8%. While the maximum power density drop is 27.1% for the aged MEA at low temperature and pressure. Comparison of the electrochemical impedance spectroscopy responses of MEAs shows that during aging process, the charge transfer resistance increase rate is more at higher temperature and pressure. This suggests the more severe destruction of catalyst layer at higher temperature and pressure and is in agreement with the obtained values of electrochemical surface area from the cyclic voltammetry test. In addition, the transmission electron microscopy and scanning electron microscopy images show the further degradation of cathode catalyst layer and more sever Pt agglomeration at higher temperature and pressure. |
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| Keywords: | Accelerated degradation test Carbon corrosion Dead-ended anode Degradation Membrane electrode assembly Proton exchange membrane fuel cell |
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