Hydrophobic asymmetric ultrafiltration PVDF membranes: an alternative separator for VFB with excellent stability.
Hydrophobic asymmetric ultrafiltration PVDF membranes: an alternative separator for VFB with excellent stability.
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DOI：
10.1039/c2cp43761a
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
Wenping Wei;Huamin Zhang;Xianfeng Li;Hongzhang Zhang;Yun Li;I. Vankelecom
中科院分区：
文献类型：
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作者：
Wenping Wei;Huamin Zhang;Xianfeng Li;Hongzhang Zhang;Yun Li;I. Vankelecom
首次研究了聚偏氟乙烯（PVDF）超滤膜在全钒液流电池（VFB）中的应用。令人惊讶的是，具有疏水孔壁和几十纳米的相对大的孔径的PVDF超滤膜被证明能够有效地分离钒离子和质子，因此适合作为VFB分离器。这种新型的VFB膜的离子选择性可以通过改变铸膜液的组成和铸膜厚度来控制膜的形态而容易地调节。结果表明，PVDF膜在VFB应用中提供了良好的性能和优异的稳定性，在性能方面，它可以真正取代Nafion在VFB应用中，但成本要低得多。
Polyvinylidene fluoride (PVDF) ultrafiltration membranes were investigated for the first time in vanadium redox flow battery (VFB) applications. Surprisingly, PVDF ultrafiltration membranes with hydrophobic pore walls and relatively large pore sizes of several tens of nanometers proved able to separate vanadium ions and protons efficiently, thus being suitable as a VFB separator. The ion selectivity of this new type of VFB membrane could be tuned readily by controlling the membrane morphology via changes in the composition of the membrane casting solution, and the casting thickness. The results showed that the PVDF membranes offered good performances and excellent stability in VFB applications, where it could, performance-wise, truly substitute Nafion in VFB applications, but at a much lower cost.