Proton exchange membranes modified with sulfonated silica nanoparticles for direct methanol fuel cells
Proton exchange membranes modified with sulfonated silica nanoparticles for direct methanol fuel cells
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DOI：
10.1016/j.memsci.2007.03.007
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发表时间：
2007-06
影响因子：
9.5
通讯作者：
Yu-Huei Su;Ying‐Ling Liu;Yi-Ming Sun;J. Lai;Da-ming Wang;Yan Gao;Baijun Liu;M. Guiver
中科院分区：
文献类型：
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作者：
Yu-Huei Su;Ying‐Ling Liu;Yi-Ming Sun;J. Lai;Da-ming Wang;Yan Gao;Baijun Liu;M. Guiver
以磺化聚芳醚酮（sPPEK）和不同量的磺化二氧化硅纳米粒子（SiO2-SO 3 H）为原料，制备了纳米复合质子交换膜。二氧化硅-SO 3 H的使用补偿了当使用非磺化纳米填料时观察到的膜的离子交换容量的降低。sPPEK链和二氧化硅-SO 3 H颗粒之间的强-SO 3 H/-SO 3 H相互作用导致膜结构中的离子交联，这增加了膜的热稳定性和耐甲醇性。含有7.5 phr二氧化硅-SO 3 H（phr=膜中二氧化硅-SO 3 H的克数/100 g sPPEK）的膜具有低甲醇渗透、高结合水含量和比原始sPPEK膜高3.6倍的质子电导率。
Nanocomposite proton exchange membranes were prepared from sulfonated poly(phthalazinone ether ketone) (sPPEK) and various amounts of sulfonated silica nanoparticles (silica-SO3H). The use of silica-SO3H compensates for the decrease in ion exchange capacity of membranes observed when non-sulfonated nano-fillers are utilized. The strong –SO3H/–SO3H interaction between sPPEK chains and silica-SO3H particles leads to ionic cross-linking in the membrane structure, which increases both the thermal stability and methanol resistance of the membranes. The membrane with 7.5 phr of silica-SO3H (phr=g of silica-SO3H/100g of sPPEK in membranes) exhibits low methanol crossover, high bound-water content, and a proton conductivity of 3.6 fold increase to that of the pristine sPPEK membrane.