| abstract |
Binder composites for membrane electrode assemblies and membrane electrode assemblies employing the same are provided. The binder composition includes a solvent, a hyper-branched polymer and a polymer with high conductivity of hydronium, wherein the hyper-branched polymer and the polymer with high conductivity of hydronium are distributed uniformly over the solvent, and the hyper-branched polymer has a DB (degree of branching) more than 0.5. Further, the solid content of the hyper-branched polymer is not less than 5%, based on the weight of the proton exchange membrane. |