Crosslinked polybenzoxazines obtained by crosslinking a monofunctional first benzoxazine monomer and a multifunctional second benzoxazine monomer with a crosslinkable compound, an electrolyte membrane including the same, a method of preparing the electrolyte membrane, a fuel cell including the electrolyte membrane having the crosslinked polybenzoxazines using the method. The crosslinked polybenzoxazines have strong acid trapping capability, improved mechanical properties, and excellent chemical stability as it does not melt in polyphosphoric acid. Even as the amount of impregnated proton carrier and the temperature are increased, mechanical and chemical stability is highly maintained, and thus the electrolyte membrane can be effectively used for fuel cells at a high temperature.
通过交联一种单官能基第一苯并噁嗪单体和一种多官能基第二苯并噁嗪单体,使用可交联化合物交联制得的交联聚苯并噁嗪,其中包括该聚苯并噁嗪的电解质膜,制备该电解质膜的方法,以及包含使用该方法制得的交联聚苯并噁嗪的电解质膜的燃料电池。交联聚苯并噁嗪具有强酸捕获能力、改善的机械性能和优异的
化学稳定性,因为它不会在多
磷酸中熔化。即使增加了浸渍质子载体的量和温度,机械和
化学稳定性仍然高度保持,因此电解质膜可以在高温下有效地用于燃料电池。