Development and demonstration of a higher temperature PEM fuel cell stack |
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| Affiliation: | 1. Ionomem Corporation, University of Connecticut, Environmental Research Institue, 270 Middle Turnpike Unit 5210, Storrs CT 06269, USA;2. University of Connecticut, Department of Chemical Engineering, 191 Auditorium Road, Storrs CT 06269, USA;1. International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi 710049, China;2. Clean Energy Research Institute, Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL 33124, USA;1. Institut de Robòtica i Informàtica Industrial (CSIC-UPC), Parc Tecnològic de Barcelona, C/Llorens i Artigas 4-6, 08028 Barcelona, Spain;2. Universitat Politècnica de Catalunya (UPC), U Building (FME), 507, C/ Pau Gargallo, 5, 08028 Barcelona, Catalunya, Spain;1. Department of Polymer Science and Technology, Middle East Technical University, 06800, Ankara, Turkey;2. Department of Energy System Engineering, At?l?m University, 06836, Incek, Ankara, Turkey;1. Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China;2. Guangdong Research Center for Interfacial Engineering of Functional Materials, Shenzhen University, Shenzhen 518060, China;3. Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry and Chemical Engineering, Sun Yat-sen University, No. 135, Xingang Xi Road, Guangzhou 510275, China;1. Mechanical Engineering Department, University of Akron, Ohio, 302 E Buchtel Ave, Akron, OH 44325, USA;2. Institute of Materials and Energy, Iranian Space Research Center, Isfahan, Po.Box: 81395-619, Iran |
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| Abstract: | Research and development was conducted on a proton exchange membrane (PEM) fuel cell stack to demonstrate the capabilities of Ionomem Corporation's composite membrane to operate at 120 °C and ambient pressure for on-site electrical power generation with useful waste heat. The membrane was a composite of polytetrafluoroethylene (PTFE), Nafion®, and phosphotungstic acid. Studies were first performed on the membrane, cathode catalyst layer, and gas diffusion layer to improve performance in 25 cm2, subscale cells. This technology was then scaled-up to a commercial 300 cm2 size and evaluated in multi-cell stacks. The resulting stack obtained a performance near that of the subscale cells, 0.60 V at 400 mA cm?2 at near 120 °C and ambient pressure with hydrogen and air reactants containing water at 35% relative humidity. The water used for cooling the stack resulted in available waste heat at 116 °C. The performance of the stack was verified. This was the first successful test of a higher-temperature, PEM, fuel-cell stack that did not use phosphoric acid electrolyte. |
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