Organic/inorganic composite membranes for application in DMFC
Organic/inorganic composite membranes for application in DMFC
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DOI：
10.1016/j.memsci.2005.03.036
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发表时间：
2005-09
影响因子：
9.5
通讯作者：
Zhang Gaowen;Zhou Zhen-tao
中科院分区：
文献类型：
--
作者：
Zhang Gaowen;Zhou Zhen-tao
以磺化聚醚醚酮（SPEEK）和层状硅酸盐（如有机蒙脱土（OMMT））为原料，采用溶液插层技术制备了直接甲醇燃料电池（DMFC）用有机/无机复合膜。通过有机改性，使亲水性MMT具有亲有机性，从而与常规有机聚合物相容。x射线衍射（XRD）结果表明，SPEEK基体中MMT的层间距超过5.88nm， SPEEK的聚合物链已经扩散到MMT廊中。SPEEK/OMMT复合膜的甲醇渗透率明显降低。同时，复合膜在90℃时的质子电导率为1.2×10−2S/cm，接近于Nafion®115。因此，SPEEK/OMMT复合膜为全氟化膜提供了一种低成本的替代品。
Organic/inorganic composite membranes for direct methanol fuel cell (DMFC) application were prepared with sulfonated poly(ether ether ketone) (SPEEK) and layered silicate such as organic-montmorillonite (OMMT) by solution intercalation technique. Through organically modification, the hydrophilic MMT was made organophilic and therefore was compatible with conventional organic polymers. The result of X-ray diffraction (XRD) shows that the interlayer spacing of MMT in the SPEEK matrix exceeds 5.88nm and the polymer chains of SPEEK have diffused into the MMT galleries. The methanol permeability of the SPEEK/OMMT composite membranes decreases significantly. At the same time, the composite membranes show 1.2×10−2S/cm proton conductivity at 90°C, which approaches the value of Nafion®115. As a result, SPEEK/OMMT composite membranes offer a low-cost alternative to the perfluorinated membranes.