▎ 摘　　要

NOVELTY - A composite methanol fuel cell proton exchange membrane comprises polybenzimidazole and amphoteric ion modified graphene oxide with weight ratio of 90:10-98:2. USE - Composite methanol fuel cell proton exchange membrane. ADVANTAGE - The amphoteric ion modified graphene oxide has good hydrophilic performance, keeps the water content in the composite film while avoiding main chain sulfonated PBI problem such as poor solubility, and it obtains a higher resistance methanol performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of composite methanol fuel cell proton exchange membrane by preparing polybenzimidazole solvent, adding amphoteric ion modified graphene oxide, and uniformly dispersing; and pouring the suspension in a clean and smooth glass plate, standing, cooling at room temperature, and demolding at 80-100 degrees C to obtain the compound proton exchange membrane.