A Bunch-Like Tertiary Amine Grafted Polysulfone Membrane for VRFBs with Simultaneously High Proton Conductivity and Low Vanadium Ion Permeability

Tan, Qinglong; Lu, Shanfu; Si, Jiangju; Wang, Haining; Wu, Chunxiao; Li, Xianfeng; Xiang, Yan

doi:10.1002/marc.201600710

Cited by 24 publications

(21 citation statements)

References 43 publications

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“…Thus, the ion selectivity of p‐ PSF‐PVP reaches 10.63 ×10 7 S ⋅ min ⋅ cm −3 after 6 h with phosphoric acid treatment as shown in Figure b. The ion selectivity is significantly higher than that of the pristine PSF‐PVP membrane (6.67 ×10 7 S ⋅ min ⋅ cm −3 ) and commercial Nafion212 (2.26×10 7 S ⋅ min ⋅ cm −3 ) tested under the identical conditions …”

Section: Figurementioning

confidence: 99%

Acid Pretreatment to Enhance Proton Transport of a Polysulfone‐Polyvinylpyrrolidone Membrane for Application in Vanadium Redox Flow Batteries

Zhang

et al. 2018

ChemPlusChem

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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.

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Section: Figurementioning

confidence: 99%

Acid Pretreatment to Enhance Proton Transport of a Polysulfone‐Polyvinylpyrrolidone Membrane for Application in Vanadium Redox Flow Batteries

Zhang

et al. 2018

ChemPlusChem

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“…DMEA monomer has a tertiary amine group in its chemical structure. This weakly basic group (-NR 2 ) possess a lone pair of electrons which becomes protonated in the acidic electrolyte of VRFB [50]. The resulting -NR 2 H + moiety facilitates a labile proton, which can be transferred to another amine group participating in the Grotthus mechanism of proton hopping, contributing to the ionic conductivity [51].…”

Section: Membrane Fabrication and Morphology Characterizationmentioning

confidence: 99%

Composite Anion-Exchange Membrane Fabricated by UV Cross-Linking Vinyl Imidazolium Poly(Phenylene Oxide) with Polyacrylamides and Their Testing for Use in Redox Flow Batteries

et al. 2021

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Composite anion-exchange membranes (AEMs) consisting of a porous substrate and a vinyl imidazolium poly(phenylene oxide) (VIMPPO)/acrylamide copolymer layer were fabricated in a straightforward process, for use in redox flow batteries. The porous substrate was coated with a mixture of VIMPPO and acrylamide monomers, then subsequently exposed to UV irradiation, in order to obtain a radically cured ion-exchange coating. Combining VIMPPO with low-value reagents allowed to significantly reduce the amount of synthesized ionomer used to fabricate the mem- brane down to 15%. Varying the VIMPPO content also allowed tuning the ionic transport properties of the resulting AEM. A series of membranes with different VIMPPO/acrylamides ratios were prepared to assess the optimal composition by studying the changes of membranes properties—water uptake, area resistivity, permeability, and chemical stability. Characterization of the membranes was followed by cycling experiments in a vanadium RFB (VRFB) cell. Among three composite membranes, the one with VIMPPO 15% w/w—reached the highest energy efficiency (75.1%) matching the performance of commercial ion-exchange membranes (IEMs) used in VRFBs (Nafion® N 115: 75.0% and Fumasep® FAP 450: 73.0%). These results showed that the proposed composite AEM, fabricated in an industrially oriented process, could be considered to be a lower-cost alternative to the benchmarked IEMs.

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“…The research group at Beihang University developed a series of dense PSF based membranes via a simple preparation process . The dense PSF/PVP membranes with superior chemical stability were constructed using the blending method 119c.…”

Section: Nonionic Membranes For Vrfbsmentioning

confidence: 99%

“…The assembled VRFB showed a high CE of 98% and VE of 91%, and remained stable for 2000 h during the charge–discharge test at 80 mA cm −2 . To further enhance the ion selectivity, graphene oxide was incorporated into the PSF/PVP membrane 120b. The ion selectivity shows volcano shape against the content of GO in the range of 0.025% to 0.1% with peak of 2.2 × 10 7 S cm −3 min −1 at 0.05%.…”

Section: Nonionic Membranes For Vrfbsmentioning

confidence: 99%

The Structure–Activity Relationship in Membranes for Vanadium Redox Flow Batteries

Jiang

Xiang

et al. 2019

Advanced Sustainable Systems

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IntroductionWith the rapid increase of consumption of fossil fuels and the consequent environment pollution, there is an urgent need for the development and effective utilization of renewable energy sources like wind, solar, biomass, etc. However, these renewable energy sources are intermittent in nature, leading to the conflict between the seasonal and unstable electricity generation and requirement of the continuous and stable power supply for the end application. Thereby, energy storage Vanadium redox flow batteries (VRFBs) are regarded as one of the most promising electrochemical technologies for grid-connected renewable energy storage systems. The performance of VRFBs, however, strongly depends on the membrane, one of the key components of VRFBs with critical dual functions of promotion of diffusion of active species (H + , H 3 O + , SO 4 2−, or SO 4 H − ) and inhibition of crossover of vanadium ions. This is intrinsically related to the microstructure of membranes. For example, large and connected ionic clusters or pores in membranes are favorable for the ion transfer, but detrimental to the ion selectivity. While small and isolated hydrophilic ion clusters or pores suppress the water uptake and ion transfer, the decreased swelling ratio would enhance chemical stability of membrane. Thus, comprehensive strategies are required to realize the optimal balance between the ion selectivity, proton conductivity, and chemical stability. This review focuses on the effects of microstructure of membranes on the ion transfer and the chemical stability, including introduction of the rigid groups, electron-withdrawing groups, and hydrophobic backbones, are reviewed. The prospect of the development of membranes with high ion selectivity and high-performance VRFBs is discussed.

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A Bunch-Like Tertiary Amine Grafted Polysulfone Membrane for VRFBs with Simultaneously High Proton Conductivity and Low Vanadium Ion Permeability

Cited by 24 publications

References 43 publications

Acid Pretreatment to Enhance Proton Transport of a Polysulfone‐Polyvinylpyrrolidone Membrane for Application in Vanadium Redox Flow Batteries

Acid Pretreatment to Enhance Proton Transport of a Polysulfone‐Polyvinylpyrrolidone Membrane for Application in Vanadium Redox Flow Batteries

Composite Anion-Exchange Membrane Fabricated by UV Cross-Linking Vinyl Imidazolium Poly(Phenylene Oxide) with Polyacrylamides and Their Testing for Use in Redox Flow Batteries

The Structure–Activity Relationship in Membranes for Vanadium Redox Flow Batteries

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