The dependence of performance degradation of membrane electrode assembly on platinum loading in polymer electrolyte membrane fuel cell
| Autor: | Yung-Eun Sung, Nak-Hyun Kwon, Yoon-Hwan Cho, Heeman Choe, Ok-Hee Kim, Oh Joong Kwon, Yun Sik Kang, Ju Wan Lim, Yong-Hun Cho, Won-Sub Yoon |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Scanning electron microscope Membrane electrode assembly Analytical chemistry Energy Engineering and Power Technology Electrolyte Condensed Matter Physics Electrochemistry Cathode law.invention Dielectric spectroscopy Fuel Technology Membrane Chemical engineering law Electrode |
| Zdroj: | International Journal of Hydrogen Energy. 37:2490-2497 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2011.10.115 |
| Popis: | The durability of membrane electrode assemblies (MEAs) with varying amounts of Pt loading on the cathode of polymer electrolyte membrane fuel cells was investigated using load cycling as an accelerated degradation test (ADT). The single-cell performance of the MEA as determined by the ADT declined by approximately 34, 48, and 78%, when cathode Pt loading in the MEA was reduced to 0.3, 0.2, and 0.1 mg cm−2, respectively. The increase in MEA performance declined at higher cathode Pt loading conditions, and the degradation rate of MEA performance was also diminished. To characterize the electrochemical and structural properties of the MEAs, cyclic voltammograms, electrochemical impedance spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and field-emission scanning electron microscopy were utilized before and after ADT. |
| Databáze: | OpenAIRE |
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