Dimensional stability of polymer electrolyte membrane stands out always important issue as well as proton conductivity. The reinforced membrane can be a good solution to enhance the dimensional stability for not only perfluorosulfonic acid polymer but also hydrocarbon based polymer. In this study, we have prepared nanofiber reinforced polymer electrolyte membranes for proton exchange membrane fuel cells. The nanofiber reinforced PEMs was impregnated by introducing hydrocarbon polymer electrolytes into web-like substrate. Due to high porosity and the intrinsic structure of reinforced PEMs, dimensional stability are improved without sacrificing membrane performance. Consequently, reinforced PEMs exhibited higher physical properties than unreinforced PEMs.

• 이동훈(코오롱인더스트리(주) 중앙기술원, 2B연구그룹) | Donghoon Lee