Performance Degradation Tests of Phosphoric Acid Doped PBI Membrane Based High Temperature PEM Fuel Cells

Fan Zhou, Samuel Simon Araya, Ionela Grigoras, Søren Juhl Andreasen, Søren Knudsen Kær

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

1 Citation (Scopus)

Abstract

Degradation tests of two phosphoric acid (PA) doped PBI membrane based HT-PEM fuel cells were reported in this paper to investigate the effects of start/stop and the presence of methanol in the fuel to the performance degradation. Continuous tests with H2 and simulated reformate which was composed of H2, water steam and methanol as the fuel were performed on both single cells. 12-h-startup/12-h-shutdown dynamic tests were performed on the first single cell with pure dry H2 as the fuel and on the second single cell with simulated reformate as the fuel. Along with the tests electrochemical techniques such as polarization curves and electrochemical impedance spectroscopy (EIS) were employed to study the degradation mechanisms of the fuel cells. Both single cells showed an increase in the performance in the H2 continuous tests, because of a decrease in the ORR kinetic resistance probably due to the redistribution of PA between the membrane and electrodes. EIS measurement of first fuel cell during the start/stop test showed that the mass transfer resistance and ohmic resistance increased which can be attributed to the corrosion of carbon support in the catalyst layer and degradation of the PBI membrane. During the continuous test with simulated reformate as the fuel the ORR kinetic resistance and mass transfer resistance of both single cells increased. The performance of the second single cell experienced a slight decrease during the start/stop test with simulated reformate as the fuel.
Original languageEnglish
Title of host publicationProceedings of the ASME 2014 8th International Conference on Energy Sustainability & ASME 2014 12th Fuel Cell Science, Engineering and Technology Conference : ES/FuelCell 2014
Number of pages10
Place of PublicationBoston, USA
PublisherAmerican Society of Mechanical Engineers
Publication dateJul 2014
Article numberFuelCell2014-6358
ISBN (Electronic)978-0-7918-4588-2
DOIs
Publication statusPublished - Jul 2014
EventASME 2014 8th International Conference on Energy Sustainability & 12th Fuel Cell Science, Engineering and Technology Conference - Boston, Massachusetts, United States
Duration: 29 Jun 20142 Jul 2014

Conference

ConferenceASME 2014 8th International Conference on Energy Sustainability & 12th Fuel Cell Science, Engineering and Technology Conference
CountryUnited States
CityBoston, Massachusetts
Period29/06/201402/07/2014

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