Deciphering the role of 2D graphene oxide nanofillers in polymer membranes for vanadium redox flow batteries

Thangarasu, Sadhasivam; Shalu,; Palanisamy, Gowthami; Sadhasivam, Subramani; Selvakumar, Karuppaiah; Eswar Neerugatti, Krishna Rao; Oh, Tae Hwan

doi:10.1039/d4ta00001c

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta00001c

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Deciphering the role of 2D graphene oxide nanofillers in polymer membranes for vanadium redox flow batteries

Sadhasivam Thangarasu,

Shalu,

Gowthami Palanisamy

et al.

Abstract: This comprehensive review article explains the influence of various GO and GO-polymer membrane modifications for VRFB, which range from cation and anion exchange to amphoteric and zwitterionic membranes.

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Cited by 3 publications

References 247 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

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Graphene oxide-modified cellulose acetate membranes with improved Congo red removal efficiency

Jafer,

Mindeel,

Hussein

et al. 2024

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The casting method was used to obtain membranes from cellulose acetate (CA) with different contents (0.1; 0.4; 0.8 wt%) of graphene oxide (GO). FESEM and FT-IR were used to evaluate the membrane structure. The contact angle was also examined. Congo red was used to evaluate the membrane efficiency. The contact angle of CA/GO membranes decreased from 55.47˚ (CA) to 38.16˚ (0.4 wt% GO), which indicates good dispersion of GO in the CA matrix. CA/GO membranes showed less irreversible fouling, which indicates that reversible fouling predominated over fouling of all membranes. Increasing the membrane porosity, pore size and hydrophilicity results in higher permeability.

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Developments in Nanostructured MoS2-Decorated Reduced Graphene Oxide Composite Aerogel as an Electrocatalyst for the Hydrogen Evolution Reaction

Thangarasu,

Bhosale,

Palanisamy

et al. 2024

Gels

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Developing lightweight, highly active surfaces with a high level of performance and great stability is crucial for ensuring the dependability of energy harvesting and conversion devices. Aerogel-based electrocatalysts are an efficient option for electrocatalytic hydrogen production because of their numerous benefits, such as their compatibility with interface engineering and their porous architecture. Herein, we report on the facile synthesis of a nanorod-like molybdenum sulfide–reduced graphene oxide (M-rG) aerogel as an electrocatalyst for the hydrogen evolution reaction (HER). The 3D architecture of the network-like structure of the M-rG hybrid aerogel was created via the hydrothermal technique, using a saturated NaCl solution-assisted process, where the MoS2 was homogeneously incorporated within the interconnected rGO aerogel. The optimized M-rG-300 aerogel electrocatalyst had a significantly decreased overpotential of 112 mV at 10 mA/cm2 for the HER in alkaline conditions. The M-rG-300 also showed a higher level of reliability. The remarkable efficiency of the HER involving the M-rG-300 is principally attributed to the excellent connectivity between the rGO and MoS2 in the aerogel structure. The efficient interconnection influenced the achievement of a larger electrochemically active surface area, increased electrical conductivity, and the exposure of more active sites for the HER. Furthermore, the creation of a synergistic effect in the M-rG-300 aerogel is the most probable mechanism to boost the electrocatalytic activity.

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Deciphering the role of 2D graphene oxide nanofillers in polymer membranes for vanadium redox flow batteries

Abstract: This comprehensive review article explains the influence of various GO and GO-polymer membrane modifications for VRFB, which range from cation and anion exchange to amphoteric and zwitterionic membranes.

Cited by 3 publications

References 247 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

Graphene oxide-modified cellulose acetate membranes with improved Congo red removal efficiency

Developments in Nanostructured MoS2-Decorated Reduced Graphene Oxide Composite Aerogel as an Electrocatalyst for the Hydrogen Evolution Reaction

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