Design of polybenzimidazolium membranes for use in vanadium redox flow batteries

Duburg, J. C.; Chen, B.; Holdcroft, S.; Schmidt, T. J.; Gubler, L.

doi:10.1039/d3ta07212f

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta07212f

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Design of polybenzimidazolium membranes for use in vanadium redox flow batteries

J. C. Duburg,

B. Chen,

S. Holdcroft

et al.

Abstract: In the recent years, polybenzimidazole (PBI) membranes have been proposed for vanadium redox flow batteries (VRFBs) as an alternative to perfluoroalkylsulfonic acid membranes such as Nafion™. Despite their excellent capacity...

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Cited by 2 publications

References 42 publications

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A Critical Update on the Design of Dense Ion‐Conducting Membranes for Redox Flow Batteries

Niccolai,

Guazzelli,

El Koura

et al. 2024

Advanced Sustainable Systems

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Recent progress in the design and preparation of dense ion‐conducting membranes, to improve redox flow batteries (RFBs) performance are critically examined. The ideal membrane has to balance a high ionic conductivity, a low crossover of ion/redox‐active species, and high coulombic and voltage efficiencies. Several ion exchange membranes are analyzed, with a focus on proton exchange membranes (PEMs), that are the most mature membrane technology in RFBs, led by the gold standard Nafion. Key developments in the design of membranes include the synthesis of tailored (co)polymers, the post‐functionalization of commercially available ones, membrane formation techniques like electrospinning, polymer blending, the additions of organic and inorganic fillers, and surface modification. Dense, asymmetric and composite membranes are reported and discussed. The effects on the membrane properties of macromolecular parameters (polymer backbone, type and length of the side chains, and the acidity of the ion‐exchanging group) are highlighted. Correlations between chemical structure, properties and performance are discussed, targeting the trade‐off between conductivity, selectivity and overall performance of the RFB cell. Although significant steps forward in the development of ion‐conducting membranes were made, improvements in electrochemical properties and long‐term stability, while reducing costs, are still challenging and necessary to a large‐scale application of RFBs.

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A Critical Update on the Design of Dense Ion‐Conducting Membranes for Redox Flow Batteries

Niccolai,

Guazzelli,

El Koura

et al. 2024

Advanced Sustainable Systems

View full text Add to dashboard Cite

show abstract

Ion Exchange Membranes: Latest Developments toward High-Performance Vanadium Redox Flow Batteries

Sreenath,

P S,

Krebsz

et al. 2024

ACS Appl. Energy Mater.

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Redox flow batteries (RFBs) are one of the hopes for grid energy storage applications. Among the various RFBs, the vanadium redox flow battery (VRFB) has the specific advantage of deploying the same element, i.e., vanadium in different oxidation states in both negolyte and posolyte. However, its major unmet concern is the poor charge retention during cycling, attributed to cross-contamination of vanadium across the separator. Perfluorosulfonic acid-based cation exchange membranes (CEMs) are the preferred separators for VRFB. Nevertheless, for the negatively charged matrix of CEMs, redox-active vanadium species are the counterions and easily diffuse through, leading to capacity decay. To counter the crossover, the benefit of Donnan exclusion has been considered. For this reason, anion exchange membranes (AEMs) are encouraged for VRFB. The positive charge on AEMs can effectively exclude the vanadium ions, but AEMs have the limitation of low ionic conductivity and questionable chemical stability in a highly oxidative flow battery environment. In recent years, the membrane research community has adopted different strategies to counter the cross-contamination of the vanadium ions between the electrodes and boost the overall performance of the battery. In this review, we will focus on the various approaches developed for the advancement of VRFB membranes.

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Design of polybenzimidazolium membranes for use in vanadium redox flow batteries

Abstract: In the recent years, polybenzimidazole (PBI) membranes have been proposed for vanadium redox flow batteries (VRFBs) as an alternative to perfluoroalkylsulfonic acid membranes such as Nafion™. Despite their excellent capacity...

Cited by 2 publications

References 42 publications

A Critical Update on the Design of Dense Ion‐Conducting Membranes for Redox Flow Batteries

A Critical Update on the Design of Dense Ion‐Conducting Membranes for Redox Flow Batteries

Ion Exchange Membranes: Latest Developments toward High-Performance Vanadium Redox Flow Batteries

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