| 초록 |
In the proton exchange membrane fuel cell, the durability is recently the critical issue in its operation. As the Ce+3 cerium ion (Ce) is a potential scavenger for ∙OH and ∙OOH radicals, the main causes of the chemical degradation of the membrane, aminomethyl-15-crown-5-ether (CRE) and dual sulfonated 3,3-diphenylpropylamine (DSDPA) were grafted onto the poly(arylene ether ketone) (PAEK) to maintain high proton conductivity and chemical stability by alleviating the migration of Ce from the membrane. The chemical and physical structures of the DSPAEK-CRE along with the coordination complex of CRE and Ce ions were investigated using 1H-NMR and SAXs, and XPS spectroscopy. The Fenton’s test showed huge improvement of anti-oxidation stability by the presence of CRE. While the CRE/Ce coordinated membrane showed higher proton conductivity and better chemical stability than the Ce+3 dispersed one. |
