Acid Pretreatment to Enhance Proton Transport of a Polysulfone-Polyvinylpyrrolidone Membrane for Application in Vanadium Redox Flow Batteries.,ChemPlusChem

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Acid Pretreatment to Enhance Proton Transport of a Polysulfone-Polyvinylpyrrolidone Membrane for Application in Vanadium Redox Flow Batteries.
ChemPlusChem ( IF 3.0 ) Pub Date : 2018-08-24 , DOI: 10.1002/cplu.201800243
Chunxiao Wu ₁ , Jin Zhang ₁ , Shanfu Lu ₁ , Yan Xiang ₁ , San Ping Jiang ₂

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An acid pretreatment strategy is developed to enhance the proton transport of polysulfone-polyvinylpyrrolidone (PSF-PVP) membranes for application in vanadium redox flow batteries (VRFB). The acid pretreatment leads to the formation of ionic conducting clusters with a size of around d=15.41 nm in the membrane (p-PSF-PVP). As a result, the proton conductivity and proton/vanadium ion selectivity of the p-PSF-PVP membrane increases to 6.60×10-2 S cm-1 and 10.63×107 S min cm-3 , respectively, values significantly higher than 2.30×10-2 S cm-1 and 6.67×107 S min cm-3 of the pristine PSF-PVP membrane. Moreover, a VRFB assembled with the p-PSF-PVP membrane exhibits a high coulombic efficiency of 98.6 % and an outstanding energy efficiency of 88.5 %. The results indicate that treatment with either sulfuric acid or phosphoric acid leads to an improvement of membrane properties, and the acid pretreatment is a promising strategy to significantly enhance the performance of the PSF-PVP membrane for VRFB application.

中文翻译：

酸预处理可增强用于钒氧化还原液流电池的聚砜-聚乙烯吡咯烷酮膜的质子传输。

开发了一种酸预处理策略来增强聚砜-聚乙烯吡咯烷酮（PSF-PVP）膜的质子传输，以用于钒氧化还原液流电池（VRFB）。酸预处理导致在膜（p-PSF-PVP）中形成大小约为d = 15.41 nm的离子导电簇。结果，p-PSF-PVP膜的质子传导率和质子/钒离子选择性分别增加到6.60×10-2 S cm-1和10.63×107 S min cm-3，其值明显高于2.30×。原始PSF-PVP膜的10-2 S cm-1和6.67×107 S min cm-3。此外，组装有p-PSF-PVP膜的VRFB具有98.6％的高库仑效率和88.5％的出色能量效率。

更新日期：2018-08-24

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