双层ePTFE增强复合质子交换膜的结构及性能研究  

Astudy on the structure and performance of double-layer ePTFE reinforced composite proton exchange membrane

作　　者：刘旻硕 刘芳 张雅琳 李海滨 LIU Minshuo;LIU Fang;ZHANG Yalin;LI Haibin(State Key Laboratory of Ocean Engineering,School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Hydrogen Propulsion Technology Co.,Ltd.,Shanghai 201804,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室,上海200240 [2]上海捷氢科技有限公司,上海201804

出　　处：《电源技术》2022年第10期1108-1111,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金(22179084);国家重点研发计划政府间国际科技创新合作重点专项(2017YFE0184100)。

摘　　要：质子交换膜是质子交换膜燃料电池的核心材料。基于全氟磺酸离子交联聚合物(PFSA),采用膨体聚四氟乙烯(ePTFE)多孔膜,制备出双层ePTFE增强型复合质子交换膜。与采用传统的单层ePTFE(ePTFE厚度为20μm)增强的复合膜相比,双层ePTFE增强膜(每层ePTFE厚度为10μm)因其更小的ePTFE单层厚度而更容易被PFSA渗透和填充。研究显示,与单层ePTFE增强膜相比,双层ePTFE增强膜具有更高的质子电导率、拉伸强度以及更低的溶胀率。燃料电池性能方面,双层ePTFE增强膜的峰值功率密度(477 mW/cm^(2))高于单层ePTFE增强膜(335 mW/cm^(2))。为了评估所研制双层ePTFE增强膜的应用价值,本研究将其各项物性参数与商业化增强膜(GORE)进行了对比。Proton exchange membrane(PEM)is a core component of the proton exchange membrane fuel cells(PEMFCs).In this study,a double-layer ePTFE reinforced composite PEM was prepared by intercalating double-layer ePTFE porous reinforced fiber layers into perfluorosulfonic acid(PFSA)ionomer.Compared with the traditional single-layer ePTFE(ePTFE thickness 20μm)reinforced membrane,the double-layer ePTFE reinforced membrane(ePTFE thickness 10μm)possesses shorter ePTFE penetration path in the ePTFE porous layers,which makes it easier for PFSA to infiltrate.Meanwhile,the double-layer ePTFE reinforced membrane shows higher proton conductivity,tensile strength and lower swelling rate.In terms of fuel cell performance,the peak power density(477 mW/cm^(2))of double-layer ePTFE reinforced membrane is higher than that of single-layer ePTFE reinforced mem-brane(335 mW/cm^(2)).To evaluate the application value of the developed double-layer ePTFE reinforced membrane,its physical parameters were compared with that of commercial reinforced membrane(Gore).

关 键 词：质子交换膜燃料电池 质子交换膜 增强膜 膨体聚四氟乙烯 机械性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动]