【作者】 杨武斌； 朱红；

【Author】 YANG Wu-bin , ZHU Hong (School of Sciences, Beijing Jiaotong University, Beijing 100044, China)

【机构】 北京交通大学理学院；

【摘要】 以二氧化硅和磷钨酸改性磺化聚芳醚酮,制得一种新型磺化聚醚醚酮复合膜。采用隔膜扩散方法测定复合膜的甲醇透过系数,结果表明,磷钨酸／二氧化硅／磺化聚醚醚酮复合膜的阻醇性能优于Nafion115;利用交流阻抗法测定了复合表面膜垂直方向的电导率,结果表明,复合膜的质子导电性略低于Nafion115,但复合膜的质子导电性能随着温度的提高有所增加;根据Arrhenius方程,计算出了复合膜的甲醇和质子迁移活化能。由于复合膜具有良好质子传导性能和阻醇性能,可作为直接甲醇燃料电池的质子交换膜。更多还原

【Abstract】 Novel inorganic-organic composite membranes for direct methanol fuel cell (DMFC) applications were prepared from sulfonated polyether ether ketone (SPEEK), containing phosphotungstic acid and silica generated by hydrolysis of tetraethyl orthosilicate. The organic-inorganic composites prepared in this way had lower methanol crossover than Nafion 115 membrane. The phosphotungstic acid/silica/SPEEK composite membranes had higher proton-conductivity than pure SPEEK membrane. And the activation energy of methanol crossover and proton transfer in composite membranes were calculated based on Arrhenius equation. These low cost membranes have a potential to be considered for use in direct methanol fuel cell.更多还原