▎ 摘　　要

NOVELTY - The electrolyte membrane comprises a porous fluorine-based polymer support and a nano-hole graphene sheet. A perfluorine based sulfonated polymer resin membrane that fills the inside of the pores of the porous fluorine-based polymer support and covers the outer surface. The nanohole graphene sheet is a single layer. The nanohole graphene sheet allows water permeation through the nanoholes. A pore size of the nanohole graphene sheet is 1 nanometer to 3 nanometer. The thickness of the composite polymer electrolyte membrane for a fuel cell is 5 micronmicrometre to 30 micronmicrometre. The porous fluorine-based polymer support contains polytetrafluoroethylene and is treated with acetone, methanol, ethanol, propanol or hydrogen peroxide. USE - Composite polymer electrolyte membrane for used in a fuel cell. ADVANTAGE - The electrolyte membrane enable stable driving of a fuel cell even under various humidification conditions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for producing a composite polymer electrolyte membrane for a fuel cell. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a electrolyte membrane.