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Characterization of gas diffusion electrodes for polymer electrolyte fuel cells

TitleCharacterization of gas diffusion electrodes for polymer electrolyte fuel cells
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2010
AuthorsPozio, A., Cemmi A., Carewska M., Paoletti C., and Zaza F.
JournalJournal of Fuel Cell Science and Technology
Volume7
Pagination0410031-0410037
ISSN1550624X
KeywordsAir permeability, Carbon black, Catalysts, Cathode catalyst surfaces, Current collector, Deposition technique, Diffusion in gases, Electrical resistances, Electrodes, Electrolytic reduction, Fabrication method, Fuel cells, Gas diffusion electrode, Gas diffusion electrodes, Gas diffusion layers, Gas permeability, Humidity conditions, Inert gases, Macroporous carbon, Moisture, Multilayer structures, Noble metal catalysts, Organic binders, Paper sheeting, PEFC, Polyelectrolytes, Polymer electrolyte fuel cells, Porous carbon materials, Precious metals, Preparation method, thermal analysis, Thermoanalysis, Thin layers
Abstract

Gas diffusion electrodes (GDEs), applied in polymer electrolyte fuel cells, are composed of a multilayer structure containing porous carbon materials and noble metal catalyst. Gas diffusion layer (GDL), a GDE component, consists of a thin layer of carbon black mixed with an organic binder, frequently polytetrafluoroethylene, which is coated onto a sheet of macroporous carbon backing cloth or paper. GDL serves as a current collector that allows ready access of fuel and oxidant to the anode and the cathode catalyst surfaces, respectively. In this work, a complete GDL state-of-the-art is first presented. Then, the effects of different fabrication methods and composition of gas diffusion layer are investigated and discussed in the light of gas permeability, thermal analysis, morphology, and electrical resistance. Besides, performances in H2/air fed cell at 50° C in different humidity conditions were discussed, and a comparison with own products and commercial GDLs was carried out. It was found that the different preparation methods influence the GDL properties, allowing the most suitable choice depending on the cell humidity conditions. Copyright © 2010 by ASME.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-77955449979&doi=10.1115%2f1.3119061&partnerID=40&md5=6c7eca6e4740ef823e0fe0f351a1c390
DOI10.1115/1.3119061
Citation KeyPozio20100410031