用于中温燃料电池的杂多酸铯盐/季铵化二氮杂双环辛烷聚砜与聚（四氟乙烯）复合膜。

A composite membrane of caesium salt of heteropolyacids/quaternary Diazabicyclo-octane polysulfone with poly (tetrafluoroethylene) for intermediate temperature fuel cells.

作者信息

Xu Chenxi, Wang Xu, Wu Xu, Cao Yuancheng, Scott Keith

机构信息

School of Chemical Engineering & Advanced Materials, Newcastle University, Newcastle NE1 7RU, UK.

出版信息

Membranes (Basel). 2012 Jul 10;2(3):384-94. doi: 10.3390/membranes2030384.

DOI:10.3390/membranes2030384

PMID:24958287

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4021907/

Abstract

Inorganic-organic composite electrolyte membranes were fabricated from CsXH3-XPMo12O40 (CsPOMo) and quaternary diazabicyclo-octane polysulfone (QDPSU) using a polytetrafluoroethylene (PTFE) porous matrix for the application of intermediate temperature fuel cells. The CsPOMo/QDPSU/PTFE composite membrane was made proton conducting by using a relatively low phosphoric acid loading, which benefits the stability of the membrane conductivity and the mechanical strength. The casting method was used in order to build a thin and robust composite membrane. The resulting composite membrane films were characterised in terms of the elemental composition, membrane structure and morphology by EDX, FTIR and SEM. The proton conductivity of the membrane was 0.04 S cm-1 with a H3PO4 loading level of 1.8 PRU (amount of H3PO4 per repeat unit of polymer QDPSU). The fuel cell performance with the membrane gave a peak power density of 240 mW cm-2 at 150 °C and atmospheric pressure.

摘要

采用聚四氟乙烯（PTFE）多孔基体，以CsXH3-XPMo12O40（CsPOMo）和季铵化二氮杂双环辛烷聚砜（QDPSU）制备了无机-有机复合电解质膜，用于中温燃料电池。通过使用相对较低的磷酸负载量使CsPOMo/QDPSU/PTFE复合膜具有质子传导性，这有利于膜导电性和机械强度的稳定性。采用流延法制备了薄而坚固的复合膜。通过能谱仪（EDX）、傅里叶变换红外光谱仪（FTIR）和扫描电子显微镜（SEM）对所得复合膜的元素组成、膜结构和形态进行了表征。当磷酸负载量为1.8 PRU（聚合物QDPSU每个重复单元的磷酸量）时，膜的质子传导率为0.04 S cm-1。使用该膜的燃料电池在150℃和大气压下的峰值功率密度为240 mW cm-2。