SOLID POLYMERIC ELECTROLYTE MATERIAL, PROCESS FOR PRODUCING THE SAME AND MEMBRANE/ELECTRODE ASSEMBLY FOR SOLID POLYMER FUEL CELL

• Main Author: WATAKABE, ATSUSHI
• Format: Patent
• Language: English; French; Japanese
• Published: 11.11.2004
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOSITIONS BASED THEREON; CONDUCTORS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INSULATORS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP

A solid polymeric electrolyte material comprising a polymer, preferably perfluorinated polymer, containing repeating units of an alicyclic fluorinated monomer, the alicyclic fluorinated monomer having a carbon to carbon double bond capable of radical polymerization reaction wherein one of both end carbon atoms participates in formation of a cyclic structure, the repeating units containing a strong acid group such as sulfonic acid group. The softening point of this electrolyte material is so high that the solid polymer fuel cell wherein this electrolyte material is incorporated can be operated at temperature higher than in the prior art. Further, the use of this electrolyte material in a catalytic layer of cathode of solid polymer fuel cell can realize an increase of output voltage of cell. L'invention concerne un matériau d'électrolyte polymère solide comprenant un polymère, de préférence perfluoré, qui contient des motifs répétitifs d'un monomère fluoré alicyclique, ce monomère fluoré alicyclique comprenant une double liaison carbone-carbone, capable d'une réaction de polymérisation radicalaire au cours de laquelle un ou les deux atomes de carbone terminaux participent à la formation d'une structure cyclique, ces motifs répétitifs contenant un groupe fortement acide tel qu'un groupe acide sulfonique. Le point de ramollissement de ce matériau d'électrolyte est suffisamment élevé pour permettre à une pile à combustible à électrolyte solide comprenant ce matériau d'électrolyte de fonctionner à une température plus élevée que le piles à combustibles existantes. L'utilisation de ce matériau d'électrolyte dans la couche catalytique de la cathode d'une pile à combustible à polymère solide permet en outre d'augmenter la tension de sortie de la pile.