Phys.org   September 22, 2023 Proton exchange membranes with high proton conductivity and low crossover of fuel molecules are required to realize advanced fuel-cell technology. The selective transportation of protons, which occurs by blocking the transportation of fuel molecules across a proton exchange membrane, is crucial to suppress crossover while maintaining a high proton conductivity. An international team of researchers (Japan, Germany) proposed a simple yet powerful method for optimizing the crossover-conductivity relationship by pasting sulfanilic-functionalized holey graphenes onto a Nafion membrane. Their results showed that the sulfanilic-functionalized holey graphenes supported by the membrane suppressed the crossover by 89% in methanol […]