Preparation of polytetrafluoroethylene porous membrane based composite alkaline exchange membrane with improved tensile strength and its fuel cell test
Preparation of polytetrafluoroethylene porous membrane based composite alkaline exchange membrane with improved tensile strength and its fuel cell test
复制标题
DOI：
10.1016/j.ijhydene.2012.05.134
复制
发表时间：
2012-09
影响因子：
7.2
通讯作者：
Yuan-Cheng Cao;K. Scott;Xu Wang
中科院分区：
文献类型：
--
作者：
Yuan-Cheng Cao;K. Scott;Xu Wang
介绍了一种基于多孔聚四氟乙烯（PTFE）和季铵化聚乙烯苄基氯（qPVBz/OH−）提高碱交换膜拉伸强度的策略。采用聚四氟乙烯薄膜作为支撑体制备了复合AAEM，以提高其机械强度。拉伸应力测试显示51.1 MPa，是纯阴离子交换膜qPVBz/OH−的两倍。SEM观察表明，PTFE的孔被qPVBz/OH−聚合物成功填充，并且所得膜的横截面中没有结构缺陷。合成的复合膜具有很好的热稳定性。在25 °C ~ 60 °C的温度范围内，离子电导率在1.65 × 10− 2 ~ 2.2 × 10−2S cm− 1之间。H2和O2燃料电池的功率密度为162 mW cm-2。
A strategy to improve the alkaline exchange membrane tensile strength was introduced based on porous PTFE and quaternized polyvinyl benzyl chloride (qPVBz/OH−). A thin PTFE film was used as the support to prepare the composite AAEM to improve the mechanical strength. Tensile stress tests showed 51.1 MPa which was twice that of the pure anion exchange membrane qPVBz/OH−. SEM observations showed that the pores of the PTFE were successfully filled with qPVBz/OH−polymer and there was no structure defects in the cross-section of the resultant membrane. The synthesized composite membrane had very good thermal stability. The through plane ionic conductivity was in the range of 1.65 × 10−2to 2.2 × 10−2S cm−1in the temperature range of 25 °C–60 °C. The power density of H2and O2fuel cell gave 162 mW cm−2.