| 초록 |
Perfluorosulfonated acid (PFSA) ionomer membranes, such as Nafion, have been widely used as electrolyte membranes for proton exchange membrane fuel cells. However, the PFSA ionomer membranes have suffered from drawbacks such as high price and low thermal stability. Hydrocarbon membranes have been developed as alternatives to the PFSA membranes they are susceptible to oxidative degradation by hydroxyl radicals generated during the PEM fuel cell operation. In this study, hydrocarbon composite membranes containing radical scavengers were prepared to mitigate chemical degradation of the membranes. The composite membranes containing radical scavengers based on sulfonated poly(arylene ether sulfone) polymer(SPAES) were prepared and characterized for PEMFC applications. Water uptake, ion-exchange capacity (IEC), proton conductivity and oxidative stability were investigated. In addition, hydrogen peroxide exposure experiment was adopted for fast screening of oxidative stability. |
