▎ 摘　　要

NOVELTY - Composition comprises first polymer compound, graphene oxide, and antioxidant. The first polymer compound includes polyacrylonitrile, polyvinylidene fluoride, polyvinyl alcohol, polyethylene oxide and/or polyacrylic acid. The antioxidant includes metal-based peroxide decomposition accelerator, organic-based peroxide decomposition accelerator, and peroxide decomposition accelerator salt compound. The metal-based peroxide decomposition promoter includes cerium ion, nickel ion, tungsten ion, cobalt ion, chromium ion, zirconium ion, yttrium ion, manganese ion, iron ion, titanium ion, vanadium ion, molybdenum ion, lanthanum ion, neodymium ion, silver ion, platinum ion, ruthenium ion, palladium ion, rhodium ion, cerium oxide, nickel oxide, tungsten oxide, cobalt oxide, chromium oxide, zirconium oxide, yttrium oxide, manganese oxide, iron oxide, titanium oxide, vanadium oxide, molybdenum oxide, lanthanum oxide and/or neodymium oxide. USE - The composition is useful to form porous support in reinforced composite film for film-electrode assembly of fuel cell (all claimed). ADVANTAGE - The composition improves mechanical durability and chemical durability of reinforced composite film, and increases ionic conductivity by increasing water absorption ability of the reinforced composite film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for reinforced composite film (50). DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the reinforced composite film. 50Reinforced composite film 52Porous support 52aFirst side 52bSecond side 54First resin layer