| 초록 |
Hydrocarbon-based membranes have been developed as alternatives to perfluorinated sulfonic acid membrane. However, their oxidative stability is susceptible to hydroxyl radicals, which is generated during the operation of the fuel cell. Recently, cerium has been reported as a radical scavenger for mitigating degradation of the membranes through oxidation/reduction process of the cerium (III). In this study, we prepared highly oxidative-stable hydrocarbon/cerium composite membranes. Composite membranes were prepared by immersion method applying sulfonated poly(arylene ether sulfone) (SPES, 50% DS) along with different content of cerium ion. The physicochemical properties of the composite membranes were investigated by 1H-NMR, XPS, ICP-AES and FE-SEM EDS technique. Especially, we introduced accelerated H2O2 exposure experiment to screen membranes quickly. DOE OCV holding test (90 oC, 30 % RH and 0.5 bar) was also introduced for exact stability investigation under fuel cell condition. |
