Composite high-temperature proton exchange membrane for fuel cell, preparation method therefor and use thereof

Abstract

A composite high-temperature proton exchange membrane for a fuel cell is prepared using materials include PBI and composite A@B and phosphoric acid. A is nanoparticles with a free radical quenching function and B is C3N4 having a nanosheet structure. The mass fraction of composite A@B is 0.05-2 wt. % and the mass ratio of A to B in A@B is 1:1-1:20. Composite A@B is firstly prepared, and A@B is then ultrasonically dispersed with a strong polar aprotic solvent to obtain a dispersion S1. PBI solution S2 is obtained from PBI and a strong polar aprotic solvent. S1 and S2 are uniformly mixed and stirred to obtain a casting solution S3, which is cast on plate glass with a groove. The membrane is then soaked in phosphoric acid after dying to obtain a composite membrane for a high-temperature proton fuel cell.

Dependencies are inferred from the claim text.