为了满足高温质子交换膜燃料电池使用要求,采用溶液铺膜法制备了磺化聚芳醚酮砜(SPAEEKS)与磷钨酸(HPA)复合型质子交换膜.红外光谱证明磷钨酸中的桥氧原子和端氧原子与磺酸基团形成了强烈的相互作用.扫描电镜照片显示磷钨酸粒子能够均匀地分散在聚合物的基体中.磷钨酸的引入提高了复合膜的热稳定性,含有30 wt%HPA、SPAEEKS磺化度为0.8的复合膜(HPA30/SPAEEKS-0.8)的玻璃化转变温度达到236℃,质量损失5%时的热分解温度达到了299℃.在相同测试条件下,HPA30/SPAEEKS-1.0在80℃时质子传导率高于Nation 117,而且在120℃达到了0.098 S/cm.结果表明,HPA30/SPAEEKS-1.0有望在高温质子交换膜燃料电池中得到应用.
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