Ion conductive film and fuel cell using the same

Abstract

Disclosed is an ion conductive film containing a composite body between an ion conductive polymer and a nitrogen-containing compound. The nitrogen-containing compound has an immobilized portion to the ion conductive polymer and exhibits an enantiomeric isomer structure when protonated. Alternatively, the nitrogen-containing compound is capable of assuming a chemical structure in which the multiple bond represented by the double bound is moved, with the atoms constituting the molecule not changing their positions.

1 - 5 . (canceled) 
   
   
       6 . An ion conductive film having a composite body, said composite body comprising:
 an ion conductive polymer; and   a nitrogen-comprising compound comprising a multiple bond, wherein the nitrogen-comprising compound is capable of assuming a chemical structure in which the multiple bond is moved, with atoms constituting the nitrogen-comprising compound not changing their positions.   
   
   
       7 . The ion conductive film according to  claim 6 , wherein said ion conductive polymer is a polymer comprising at least one of a sulfonic group and a carboxyl group and a fluorine-comprising resin skeleton. 
   
   
       8 . The ion conductive film according to  claim 6 , wherein said nitrogen-comprising compound is at least one compound selected from the group consisting of a guanidine compound, an imidazole compound, a triazole compound, guanidine, imidazole, triazole and combinations thereof. 
   
   
       9 . The ion conductive film according to  claim 6 , wherein the molecular weight of said nitrogen-comprising compound is not higher than 1000. 
   
   
       10 . The ion conductive film according to  claim 6 , wherein said ion conductive polymer is a fluorine-comprising sulfonic acid and the amount of said nitrogen-comprising compound falls within a range of between 1 ppm and 50,000 ppm based on said fluorine-comprising sulfonic acid. 
   
   
       11 - 20 . (canceled) 
   
   
       21 . The ion conductive film of  claim 7 , wherein the ion conductive polymer comprises the sulfonic acid group. 
   
   
       22 . The ion conductive film of  claim 7 , wherein the ion conductive polymer comprises the carboxyl group. 
   
   
       23 . The ion conductive film of  claim 7 , wherein the ion conductive polymer comprises the fluorine-comprising resin skeleton. 
   
   
       24 . The ion conductive film of  claim 7 , wherein the ion conductive polymer comprises the sulfonic acid group and the carboxyl group. 
   
   
       25 . The ion conductive film of  claim 7 , wherein the ion conductive polymer comprises the sulfonic acid group and the fluorine-comprising skeleton. 
   
   
       26 . The ion conductive film of  claim 7 , wherein the ion conductive polymer comprises the carboxyl group and the fluorine-comprising skeleton. 
   
   
       27 . The ion conductive film of  claim 7 , wherein the ion conductive polymer comprises the sulfonic acid group, the carboxyl group, and the fluorine-comprising skeleton. 
   
   
       28 . The ion conductive film of  claim 8 , wherein the nitrogen-comprising compound is the guanidine. 
   
   
       29 . The ion conductive film of  claim 8 , wherein the nitrogen-comprising compound is the imidazole. 
   
   
       30 . The ion conductive film of  claim 8 , wherein the nitrogen-comprising compound is the triazole. 
   
   
       31 . The ion conductive film of  claim 8 , wherein the nitrogen-comprising compound comprises the guanidine and the triazole. 
   
   
       32 . The ion conductive film of  claim 8 , wherein the nitrogen-comprising compound comprises the guanidine, the triazole, and the imidazole. 
   
   
       33 . The ion conductive film of  claim 8 , wherein the nitrogen-comprising compound comprises the guanidine and the imidazole. 
   
   
       34 . The ion conductive film of  claim 8 , wherein the nitrogen-comprising compound comprises the triazole and the imidazole. 
   
   
       35 . The ion conductive film of  claim 6 , wherein the ion film has a thickness of from 0.01 μm to 10 μm.