Fuel cell performance improvement via the steric effect of a hydrocarbon-based binder for cathode in proton exchange membrane fuel cells.

ABSTRACT: In this study, a sulfonated poly(ether sulfone) having cardo-type fluorenyl groups (FL-SPES) was investigated as a cathodic binder to improve fuel cell performance via increased the oxygen diffusion in the cathode. The maximum power density achieved by using the membrane electrode assembly (MEA) prepared with FL-SPES with a low ion exchange capacity (IEC) of 1.31 meq g^-1 was 520 mW cm^-2, which is more than twice as high as that of BP-SPES (210 mW cm^-2) having typical biphenyl groups with a similar IEC. At high IEC of 1.55 meq g^-1, the power density obtained by using BP-SPES was improved to 454 mW cm^-2 but remained lower than that of FL-SPES. In addition, although the IEC, swelling degree, and specific resistance were similar to each ot

SUBMITTER: Cha JE 

PROVIDER: S-EPMC9386007 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature