5-dihydroxybenzenesulfonate (SHQ), decafluorobiphenyl (DFBP), and 4-(trifluorovinyloxy)-biphenyl-2,5-diol (TFVOH) as a cross-linkable moiety. To develop a highly stable polymer electrolyte membrane (PEM) for application in polymer electrolyte fuel cells (PEFC)s, cross-linked membranes were prepared by chemical cross-linking. The cross-linked membranes were synthesized by varying the amount of TFVOH (5–30 mol %)
由
2,5-二羟基苯磺酸钾(SHQ),
十氟联苯(DFBP)和4-(
三氟乙烯基氧基)制备磺化度(DS)为70%至95%的可交联共聚物(SHQ x -TFV y s)。 )-
联苯-2,5
-二醇(TFVOH)作为可交联部分。为了开发用于聚合物电解质燃料电池(PEFC)的高度稳定的聚合物电解质膜(P
EM),通过
化学交联制备了交联的膜。通过改变TFVOH(5–30 mol%)的量来合成交联膜,以获得理想的P
EM性能。用1 H和19研究了可交联单体和聚合物的结构F NMR和FT-IR光谱。交联的膜分别在239–271°C和290–312°C的温度下具有良好的
玻璃化转变温度和热稳定性。交联的膜(DS范围为80-95%)显示出比Nafion 212(0.092 S / cm)更高的质子传导率(0.098-0.151 S / cm)。此外,在相同的测量条件下,与Nafion 212(163×10 –8 cm 2