| 초록 |
Heterocycle materials such as triazole is an effective proton conductor under anhydrous conditions and high temperature. The proton conduction in triazole at high temperatures results from the transfer of protons between adjacent triazole by Grotthuss mechanism. Since small moleculr of triazole may leach out gradually with time during fuel cell operation, which would lead to the decrease in proton conductivity and consequently fuel cell performance. Therefore, a proton conductive pathway is constructed by immobilizing into mesoporous nanofiberous SBA-15, composite in PVPA. The SBA-15 has nanofiberous structure providing proton transfer channels, through which intermolecular proton transfer occurs between adjacent triazole groups, and exhibited a thermal stability up to 200 ℃. Therefore the polymer electrolyte membranes, comprising SBA-15/triazole dispersed in Nafion, could be utilized for high temperature proton exchange membrane fuel cells |
