| 초록 |
Fuel cells have been extensively studies as electrochemical devices for convenient and efficient power sources. The proton exchange membrane is a key component in the system, because only highly stable membranes can withstand the harsh chemical and physical environment in a fuel cell. Perfluorinated polymers, such as Nafion, are most widely used for high proton conductivity and excellent oxidative stability, but because of their high cost, efforts are focused on the development of alternatives. Among the various polymers, Sulfonated poly(ether ether ketone)(PEEK) was shown to be of considerable promise, which allows casting form organic solution and offers a more convenient and less expensive process than Nafion membranes. However, the mechanical properties of PEEK tend to decrease progressively with sulfonation for extreme swelling. Cross-linking is a simple and efficient way to retain indispensable properties, such as swelling behavior methanol diffusion and thermal stabilities. |
