Fluorinated Aromatic Polyether Ionomers Containing Perfluorocyclobutyl as Cross-Link Groups for Fuel Cell Applications
作者:Kwan-Soo Lee、Myung-Hwan Jeong、Young-Jea Kim、Su-Bin Lee、Jae-Suk Lee
DOI:10.1021/cm203539m
日期:2012.4.24
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(PEM),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PEM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