PROTON EXCHANGE MEMBRANES FOR PEFC (Comunicazione a convegno)

Type
Label
  • PROTON EXCHANGE MEMBRANES FOR PEFC (Comunicazione a convegno) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Alternative label
  • PASSALACQUA Enza (2014)
    PROTON EXCHANGE MEMBRANES FOR PEFC
    in XIV International Congress of the Mexican Hydrogen Society, Cancun, Mexico, September 30 - October 4, 2014
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • PASSALACQUA Enza (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ITAE (literal)
Titolo
  • PROTON EXCHANGE MEMBRANES FOR PEFC (literal)
Abstract
  • The polymer electrolyte fuel cells (PEFCs) are a highly efficient technology and an environmentally attractive source for power generation for various applications such as automotive, stationary, military or portable devices. Proton exchange membrane (PEM) is the key component in a fuel cell system and in the recent years the research activity have focused to obtain membranes with high proton conductivity, low permeability to fuel, good chemical/thermal stability, good mechanical properties in a wide window of operative conditions of temperature, pressure and relative humidity. These features must be achieved by ensuring good performance, long durability, and low cost, for these reasons several polymers and membranes have been proposed as an alternative to conventional Nafion® membranes, especially for working at temperatures above 80°C. In this work is described the experience and progress made on the development of membranes based on two different approaches: - Composite membranes prepared by addition of inorganic oxides to improve hygroscopic and mechanical properties or by addition of heteropolyacids (phosphotungstic acid) immobilized on inorganic oxides to improve the proton conduction through the acid functionality. - Reinforced membranes obtained through the introduction of a reinforcement to improve the mechanical properties. The polymeric films, obtained by cast of the dispersion of the polymers in the solvent, have been tested in a range of temperature between 80 and 120°C with different gas humidity. Results on swelling characteristics, proton conductivity and long-term degradation of the membranes are reported. Finally, the application of composite MEAs, in a 1500W stack, especially designed for cogeneration systems, is shown and discussed. (literal)
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