Sulfophenylated centimeter-sized graphene membrane in a direct methanol fuel cell.

ABSTRACT: An ideal proton exchange membrane should only allow protons to pass and remain impermeable to fuels, as required in fuel cell applications. In methanol fuel cells, high proton conductivity enables high power density, whereas methanol crossover between the electrodes degrades the catalyst activity and lowers efficiency. In conventional polymer membranes, however, conductivity and selectivity are often antagonistic: long transport pathways are needed to achieve selectivity, but these introduce additional ionic resistance. Graphene, a two-dimensional material consisting of a single atomic layer of carbon, intrinsically addresses both requirements. Its basal plane is impermeable to water and other molecules, while still exhibiting a measurable degree of proton conductivity. Here, we show that

SUBMITTER: Zhang W 

PROVIDER: S-EPMC12675496 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature