Polymer electrolyte membrane for fuel cell, membrane electrode assembly and fuel cell including the same

A polymer electrolyte membrane for fuel cells comprising:

• a hydrocarbon-based cation exchange resin having hydrogen ion conductivity;
• and
• fibrous nanoparticles having a hydrophilic group,
• wherein a mix ratio of the hydrocarbon-based cation exchange resin having hydrogen ion conductivity and the fibrous nanoparticles having a hydrophilic group is 99.9:0.1 to 91:9 on a weight ratio basis,
• wherein the fibrous nanoparticles having a hydrophilic group is cellulose nanofibers, wherein the fibrous nanoparticles having a hydrophilic group has a diameter of 1 to 200 nm and a length of 1 to 20 μm and an aspect ratio of 1:5 to 1:2,000,
• wherein the hydrophilic group is a hydroxyl group (-OH) and is present in an amount of 5 to 90% in the cellulose nanofibers, with respect to the total sites of the hydroxyl group (-OH), and
• wherein the hydrocarbon-based cation exchange resin is one or more selected from the group consisting of benzimidazole polymers, polyimide polymers, polyetherimide polymers, polyphenylene sulfide polymers, polysulfone polymers, polyether sulfone polymers, polyether ketone polymers, polyether ether ketone polymers and polyphenyl quinoxaline polymers.