| 초록 |
Proton exchange membrane is an important part in a direct methanol fuel cell. Up to now, perfluorosulfonic acid polymer membranes, such as Nafion, still rule the market for high proton conductivity at the low temperature below 85℃. However, the high methanol diffusion leads to the poisoning of catalyst. The needs to be operated at medium temperature and lower the cost of polymer membranes have driven the search for alternative membranes. Poly(ether ether ketone) was shown to be of considerable promise for the good thermal stability. However, the mechanical properties of PEEK tend to decrease progressively with sulfonation. Cross-linking is an efficient means to enhance mechanical strength. In this present study, a series of crosslinked poly(ether ether ketone) proton exchange membranes were prepared. The crosslinked membranes were expected to possess high proton conductivity, low methanol diffusion but high chemical stability and mechanical strength. |
