高温燃料电池用PTFE增强的PVC-PVP复合高温质子交换膜的制备与性能  

Preparation and properties of PVC-PVP composite high temperature proton exchange membranes reinforced with PTFE for high temperature fuel cells

作　　者：代宇 张东彬 曾泽华 尹翔鹭 刘天豪 袁欣然 DAI Yu;ZHANG Dongbin;ZENG Zehua;YIN Xianglu;LIU Tianhao;YUAN Xinran(Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102211,China)

机构地区：[1]鞍钢集团北京研究院有限公司,北京102211

出　　处：《复合材料学报》2025年第3期1402-1411,共10页Acta Materiae Compositae Sinica

基　　金：子分公司项目(2019BJB4-011PG)。

摘　　要：在100℃以上工作的质子交换膜燃料电池(PEMFC)可以克服低温工作时的缺陷,提高铂催化剂抗CO中毒的能力、加速电极动力学、简化水热管理系统以及提高热的循环利用等。为了实现磷酸(PA)掺杂的高温质子交换膜(HT-PEM)同时具有高质子电导率和优异的力学性能,制备了一系列聚四氟乙烯(PTFE^(®))增强的聚乙烯吡咯烷酮-聚氯乙烯(PVP-PVC)复合膜。通过调整PVP和PVC的配比来寻找综合性能最佳的复合膜,并对其物理化学性能进行测试和表征。SEM结果表明,PVP-PVC均匀地填充到PTFE^(®)膜的孔隙中,没有气泡以及孔洞。通过质子电导率以及机械性能测试结果表明,PTFE增强技术使复合膜具有良好的拉伸强度和尺寸稳定性。其中,PA掺杂的PVP与PVC质量比为4的PTFE^(®)增强复合膜在160℃时的质子电导率高达0.161 S·cm^(-1),并且该膜在室温下最大的拉伸强度为15.6 MPa。在160℃时,该复合膜的峰值功率密度约为359 mW·cm^(-2)。这些结果表明,PA掺杂的PTFE增强的复合膜具有作为HT-PEM的应用潜质。Proton exchange membrane fuel cell(PEMFC)operating above 100℃can overcome the defects of low temperature operation,improve the ability of platinum catalyst to resist CO poisoning,accelerate electrode kinetics,simplify hydrothermal management system and improve heat recycling.In order to achieve both high proton conductivity and excellent mechanical properties of phosphoric acid(PA)-doped high temperature proton exchange membrane(HT-PEM),we prepared a series of polytetrafluoroethylene(PTFE^(®))-reinforced polyvinylpyrrolidone-polyvinyl chloride(PVP-PVC)composite membranes.By adjusting the ratio of PVP and PVC,the best composite membrane was found,and its physical and chemical properties were tested and characterized.SEM results showed that PVP-PVC was uniformly filled into the pores of PTFE^(®)membrane without bubbles and holes.The results of proton conductivity and mechanical property test show that PTFE^(®)enhanced membrane has good tensile strength and dimensional stability,and the proton conductivity increases with the increase of PVP content in the composite membrane.As a result,the proton conductivity of PA-doped PTFE^(®)reinforced composite membrane,i.e.,the mass ratio of PVP to PVC is 4 is as high as 0.161 S·cm^(−1)at 160℃,and the maximum tensile strength of the membrane at room temperature is 15.6 MPa.At 160℃,the peak power density of the composite membrane is about 359 mW·cm^(−2).These results indicate that PA-doped PTFE-reinforced composite membranes have the potential to be used as HT-PEM.

关 键 词：高温燃料电池 高温质子交换膜 聚乙烯吡咯烷酮 聚氯乙烯 聚四氟乙烯 

分 类 号：TB332[一般工业技术—材料科学与工程]