High performance tetra-sulfonated poly(p-phenylene-co-aryl ether ketone) membranes with microblock moieties for passive direct methanol fuel cells
High performance tetra-sulfonated poly(p-phenylene-co-aryl ether ketone) membranes with microblock moieties for passive direct methanol fuel cells
复制标题
用于被动直接甲醇燃料电池的具有微嵌段部分的高性能四磺化聚（对苯撑芳基醚酮）膜
DOI：
10.1016/j.memsci.2016.06.029
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发表时间：
2016
影响因子：
9.5
通讯作者：
Zhang Suobo
中科院分区：
文献类型：
--
作者：
Zheng Jifu;Bi Weihui;Dong Xue;Zhu Jianhua;Mao Hongchao;Li Shenghai;Zhang Suobo
通过镍(0)催化偶联共聚合成了一系列具有微嵌段部分的四磺化聚(对亚苯基-共-芳基醚酮)膜(l-tSPP-co-PAEK x)，并表现出良好的尺寸稳定性。与单磺化聚（对苯撑-芳基醚酮）膜（SPP-co-PAEK）相比，详细研究了膜的含水量、水分子状态、质子电导率、甲醇渗透性和形态之间的关系。小角X射线散射（SAXS）和透射电子显微镜（TEM）分析表明，l-tSPP-co-PAEK x 极大地促进了连接的质子传输通道。 l-tSPP-co-PAEK x 膜在室温下的质子传导率高达 60.0 mS cm−1，尽管 IEC 值低于后者，但比 SPP-co-PAEK 的质子传导率高 32%。对于室温下的被动直接甲醇燃料电池 (DMFC)，该膜表现出 27.5–31.9 mW cm−2 范围内的高功率密度。在相同的测试条件下，l-SPP-co-PAEKs 1.20 的功率密度高于商用 Nafion 115 (29.3 mW cm−2) 和 Nafion 117 (24.3 mW cm−2)。 l-tSPP-co-PAEK x 膜的理想性能可归因于膜结构中局部密集磺化亲水单元和疏水微嵌段部分的同步引入，从而形成连接的质子传输通道。
A series of tetra-sulfonated poly(p-phenylene-co-aryl ether ketone) membranes (l-tSPP-co-PAEK x) with microblock moieties have been synthesized by nickel (0) catalytic coupling copolymerization and show good dimensional stability. Compared with the mono-sulfonated poly(p-phenylene-co-aryl ether ketone) membranes (SPP-co-PAEKs), the relationships between water content, the state of water molecules, proton conductivity, methanol permeability, and morphology for the membranes are detailedly investigated. Analyses by small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM) show that the l-tSPP-co-PAEK x greatly facilitated the connected proton transport channel. The proton conductivity of l-tSPP-co-PAEK x membrane is up to 60.0 mS cm−1at room temperature, which is 32% higher than that of the proton conduction in SPP-co-PAEKs, despite the IEC values are lower than that of the latter. The membranes exhibit high power densities in the range of 27.5–31.9 mW cm−2for passive direct methanol fuel cells (DMFCs) at room temperature. The power density of l-SPP-co-PAEKs 1.20 is higher than that of commercial Nafion 115 (29.3 mW cm−2) and Nafion 117 (24.3 mW cm−2) under same test conditions. The desirable properties of l-tSPP-co-PAEK x membranes can be attributed to the synchronous introduction of locally and densely sulfonated hydrophilic units and hydrophobic microblock moieties in the membrane structure, resulting in the formation of the connected proton transport channel.