MEMBRANE ELECTRODE UNIT FOR A FUEL ELEMENT AND A METHOD FOR THE PRODUCTION THEREOF (VARIANTS)

摘要

The invention relates to producing a membrane electrode unit for hydrogen-air and alcohol-air fuel cells using a polymer proton-conductive electrolyte based on a phosphoric acid doped polybenzimidazole film and two gas diffusion electrodes. The polymer proton-conductive electrolyte which is used for producing a fuel cell membrane is made of a PBI-O-FT polymer doped with a strong phosphoric or sulphuric acid. Said membrane makes it possible to increase the operating temperature of a fuel cell to 220°C. The use of a membrane electrode unit with a phosphoric acid doped PBI-O-FT polymer material which is used in the form of a proton-conductive membrane in a hydrogen-air and alcohol-oxygen fuel cell is demonstrated with examples.