| abstract |
An electrolyte having a structure where a fluorinated hydrophilic segment A represented by -E 2 -[Rf-E 1 ] m - and a hydrocarbon hydrophobic segment B are alternately bonded to each other through chemical bond and a production process therefor, and an electrolyte membrane, a production process therefor, a catalyst layer and a fuel cell using the same. Rf is a linear or a branched perfluoro chain having one or more carbon atoms, E 1 , and E 2 are each a proton conductive portion represented by Formula —(CONM) i1 (CO) i2 (SO 2 NM) i3 (SO 2 ) i4 — (0≦i 1 , 0≦i 2 ≦1, 0≦i 3 , 0≦i 4 ≦1, 0<i 1 +i 3 , i 1 to i 4 are each an integer, and M is proton, alkali metal, or alkali earth metal), 2≦m (m is an integer), and Rf, E 1 , and E 2 may be each arbitrarily selected in the repeating unit. |