摘要
质子交换膜(PEM)作为燃料电池的核心部件,发挥着重要的作用,得到广泛的研究。聚合物纳米纤维已被广泛用作全氟磺酸质子交换膜的增强材料,以用于改善其因吸水而产生的尺寸稳定性问题。大量的研究表明单层纳米纤维对复合膜溶胀起积极作用,而增加纤维层数对其性能也有显著的影响。本研究在全氟磺酸基体中添加不同层数的在表面吸附了磺酸类共价有机框架COF(TpPa-SO_(3)H)的聚酰亚胺纤维膜(PINF),制备出多层纤维复合膜,并对其性能进行表征和分析。结果表明,双层聚酰亚胺纤维膜增强的D-TpPa-SO_(3)H@PINF/PFSA性能最佳,各项性能得到明显提升。80℃电导率为263.7 mS/cm,相比于全氟磺酸纯膜,电导率提高了63.4%,面积溶胀率降低了30.6%,氢渗透系数降低了76.0%,功率密度最大为282.6 mW/cm^(2)。
Proton exchange membrane(PEM)plays an important role as a core component of fuel cells and has been widely studied.Polymer nanofibers have been widely used as reinforcement materials for perfluorosulfonic acid proton exchange membranes for improving their dimensional stability problems due to water absorption.Numerous studies have shown that single-layer nanofibers play a positive role in the swelling of composite membranes,while increasing the number of fiber layers also has a significant effect on their performance.In this paper,multilayer fiber composite membranes were prepared by adding different layers of polyimide fiber membrane(PINF)with sulfonic acid covalent organic framework COF(TpPa SO_(3)H)adsorbed on the surface in a perfluorosulfonic acid matrix,and their properties were characterized and analyzed.Among them,the double-layer polyimide fiber membrane reinforced D TpPa SO_(3)H@PINF/PFSA had the best performance,with a significant improvement in various properties:the conductivity at 80℃was 263.7 mS/cm,which was 63.4%higher than that of the pure membrane of PFSA,with a 30.6%reduction in the area dissolution rate,a 76.0%reduction in hydrogen permeability coefficient,and the maximum power density was 282.6 mW/cm^(2).
作者
孟晓宇
鹿钟麒
彭路漫
刘心茹
乔佳怡
丛川波
周琼
MENG Xiaoyu;LU Zhongqi;PENG Luman;LIU Xinru;QIAO Jiayi;CONG Chuanbo;ZHOU Qiong(Beijing Key Laboratory of Material Failure and Corrosion Protection of Oil and Gas Equipment,College of New Energy and Materials,China University of Petroleum(Beijing),Beijing 102249,China)
出处
《膜科学与技术》
北大核心
2025年第3期35-43,共9页
Membrane Science and Technology
基金
北京市高精尖学科建设项目。
关键词
质子交换膜
聚酰亚胺
全氟磺酸
纳米纤维
燃料电池
proton exchange membrane
polyimide
perfluorosulfonic acid
nanofiber
fuel cell
