Polymer electrolyte membrane, method for producing the same, membrane-electrode assembly using the same, and fuel cell using the same

Abstract

Provided are a polymer electrolyte membrane exhibiting a relatively high ion conductivity, and a method for producing the polymer electrolyte membrane. The polymer electrolyte membrane of the present invention is an ion-conducting polymer electrolyte membrane including a polymer. The polymer includes a hydrophobic main chain and side chains bonded to the main chain. Each of the side chains includes a hydrophobic main chain portion and a plurality of side chain portions bonded to the main chain portion. Each of the side chain portions includes a hydrophobic first portion bonded to the main chain portion, and a second portion bonded to the first portion. The second portion includes an ion-conducting group.

Dependencies are inferred from the claim text.