| abstract |
The present invention is based on an organic solution of preferably phosphonic acid and tetravalent metal salt, preferably Zr, Ti, Sn and Ce, in an organic solvent, which behaves as a layered tetravalent metal salt solution which is completely insoluble in known solvents. . This specificity allows easy addition of particles of the compounds described above to the pores of the porous membrane not only on the membrane / electrode inner surface of the fuel cell, but also in the matrix of the polymer, which is soluble in the same organic solvent. The use of tetravalent metal salts, preferably zirconium phosphate-phosphonates, having high proton conductivity (in some cases higher than 10 −1 Scm −1 ) may be useful for gas species having good mechanical properties, and / or good proton conductivity. It allows the preparation of filled porous membranes and nano-polymeric membranes in combination with reduced permeability. These membranes can thus be used in fuel cells even at temperatures higher than 80 ° C. Such membranes also have high catalytic activity and thus can be used in catalytic membrane reactors. |