Composite material and preparation method thereof, PEM membrane and preparation method thereof, and fuel cell

The invention provides a composite material and a preparation method thereof, a PEM membrane and a preparation method thereof, and a fuel cell. The composite material comprises the following components in parts by mass: 0.9-1.1 parts of graphene oxide, 1-5 parts of protein, 0.4-0.6 part of polysulfone and 10-100 parts of a metal organic framework, and the graphene oxide is a graphene oxide sheet layer or a graphene oxide cluster; the protein is a protein monomer or an oligomeric protein formed by the protein monomer, and the protein monomer is a protein monomer with a biological proton selective channel; the metal organic framework is a zirconium metal organic framework. The composite material provided by the invention has excellent proton conduction capability, and the proton conduction capability of sulfonated polysulfone can be remarkably enhanced by compounding the composite material with sulfonated polysulfone. 本申请提供了复合材料及制备方法、PEM膜及制备方法、燃料电池。所述复合材料包括如下质量份的组分：氧化石墨烯0.9-1.1份，蛋白质1-5份，聚砜0.4-0.6份，金属有机框架10-100份