Polymer laminate membrane, the method for producing the membrane and the use of the membrane

Abstract

The present invention relates to a laminated membrane comprising a membrane (I) which comprises aromatic polymer electrolyte containing a super strong acid group and a membrane (II) which comprises one compound selected from the group consisting of electrolytes of perfluoroalkylsulfonic acid polymer and non-super strong acid polymer, and a laminated membrane comprising a membrane (III) which comprises a perfluoroalkylsulfonic acid polymer electrolyte and a membrane (IV) which comprises a non-super strong acid polymer electrolyte. The laminated membrane of the present invention is an electrolyte membrane excellent in generation performance and excellent also in the respect of mechanical strength.

1 - 17 . (canceled) 
     
     
         18 . A laminated membrane comprising a membrane (III) which comprises a perfluoroalkylsulfonic acid polymer electrolyte and a membrane (IV) which comprises a non-super strong acid polymer electrolyte. 
     
     
         19 . The laminated membrane according to  claim 18 , wherein the non-super strong acid polymer is a hydrocarbon polymer. 
     
     
         20 . The laminated membrane according to  claim 19 , wherein the hydrocarbon polymer is an aromatic hydrocarbon polymer. 
     
     
         21 . The laminated membrane according to  claim 18 , wherein the membrane (III) is the surface layer on at least one surface. 
     
     
         22 . The laminated membrane according to  claim 18 , wherein the proportion of the membrane (III) in the laminated membrane is 0.1 wt % to 50 wt %. 
     
     
         23 - 25 . (canceled) 
     
     
         26 . A fuel cell comprising the laminated membrane according to  claim 18 . 
     
     
         27 . The fuel cell according to  claim 26 , wherein a mixture of carbon carrying a catalyst and perfluoroalkylsulfonic acid resin fixed on an electrode is used as a current collector.