Degradation study on MEA in H3PO4/PBI high-temperature PEMFC life test
作者： Yunfeng Zhai , Huamin Zhang , Gang Liu , Jingwei Hu , Baolian Yi
DOI: 10.1149/1.2372687
关键词: Proton exchange membrane fuel cell 、 Scanning electron microscope 、 Analytical chemistry 、 Electrochemistry 、 Cyclic voltammetry 、 Membrane electrode assembly 、 Dielectric spectroscopy 、 Materials science 、 Linear sweep voltammetry 、 Cathode
摘要: In this paper, 550 h (500 continuous and 50 intermittent) high-temperature proton exchange membrane fuel cell (PEMFC, phosphoric acid-doped polybenzimidazole system, H3PO4/PBI) life test was performed without humidification at 150 degrees C; constant current (at 640 mA cm(-2)) performance polarization curves were recorded. Electrochemical physical characterizations applied to investigate the degradation of electrode assembly (MEA). The results showed that started reduce with a rate 0.18 mV h(-1) after about 90 activation. Surface area loss cathode platinum due agglomeration detected by cyclic voltammetry transmission electron microscopy. A slight increase internal resistance single H3PO4 leaching found electrochemical impedance spectroscopy energy dispersive X-ray analysis. H-2 permeability MEA increased during last intermittent because appearing cracks, linear sweep scanning These suggested catalyst from layers contributed test, mechanical properties H3PO4/PBI impacted badly lifetime cell. (c) 2006 Society.
irgrid.ac.cn参考文章(24)
O. Savadogo, Emerging membranes for electrochemical systems: Part II. High temperature composite membranes for polymer electrolyte fuel cell (PEFC) applications☆ Journal of Power Sources. ,vol. 127, pp. 135- 161 ,(2004) , 10.1016/J.JPOWSOUR.2003.09.043
Li Qingfeng, H.A. Hjuler, N.J. Bjerrum, Phosphoric acid doped polybenzimidazole membranes: Physiochemical characterization and fuel cell applications Journal of Applied Electrochemistry. ,vol. 31, pp. 773- 779 ,(2001) , 10.1023/A:1017558523354
R He, Proton conductivity of phosphoric acid doped polybenzimidazole and its composites with inorganic proton conductors Journal of Membrane Science. ,vol. 226, pp. 169- 184 ,(2003) , 10.1016/J.MEMSCI.2003.09.002
Q. Li, R. He, J.O. Jensen, N.J. Bjerrum, PBI‐Based Polymer Membranes for High Temperature Fuel Cells – Preparation, Characterization and Fuel Cell Demonstration Fuel Cells. ,vol. 4, pp. 147- 159 ,(2004) , 10.1002/FUCE.200400020
Qingfeng Li, Ronghuan He, Rolf W Berg, Hans A Hjuler, Niels J Bjerrum, Water uptake and acid doping of polybenzimidazoles as electrolyte membranes for fuel cells Solid State Ionics. ,vol. 168, pp. 177- 185 ,(2004) , 10.1016/J.SSI.2004.02.013
David Mecerreyes, Hans Grande, Oscar Miguel, Estibalitz Ochoteco, Rebeca Marcilla, Igor Cantero, Porous Polybenzimidazole Membranes Doped with Phosphoric Acid: Highly Proton-Conducting Solid Electrolytes Chemistry of Materials. ,vol. 16, pp. 604- 607 ,(2004) , 10.1021/CM034398K
Mahlon S. Wilson, Fernando H. Garzon, Kurt E. Sickafus, Shimshon Gottesfeld, Surface Area Loss of Supported Platinum in Polymer Electrolyte Fuel Cells Journal of The Electrochemical Society. ,vol. 140, pp. 2872- 2877 ,(1993) , 10.1149/1.2220925
Li Qingfeng, Hans A Hjuler, Niels J Bjerrum, Oxygen reduction on carbon supported platinum catalysts in high temperature polymer electrolytes Electrochimica Acta. ,vol. 45, pp. 4219- 4226 ,(2000) , 10.1016/S0013-4686(00)00554-5
Qingfeng Li, Ronghuan He, Ji-An Gao, Jens Oluf Jensen, Niels. J. Bjerrum, The CO Poisoning Effect in PEMFCs Operational at Temperatures up to 200°C Journal of The Electrochemical Society. ,vol. 150, pp. 1599- 1605 ,(2003) , 10.1149/1.1619984
R Bouchet, Proton conduction in acid doped polybenzimidazole Solid State Ionics. ,vol. 118, pp. 287- 299 ,(1999) , 10.1016/S0167-2738(98)00466-4