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Khoiruddin, Muh.; Munir, Misbahul; Rokhim, Abdul

doi:10.30739/istiqro.v6i2.571

Cited by 4 publications

(5 citation statements)

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“…The process involves placing the membrane in a cell with a solution and electrodes and then applying electrical potential to the electrodes. This causes the modifier to be attracted to the electrode with an opposite charge [31]. It is a process that occurs with a high deposition rate, and it is easy to regulate, cost-effective and portable [32].…”

Section: Electrodepositionmentioning

confidence: 99%

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Modified Membranes for Redox Flow Batteries—A Review

Tsehaye,

Tufa,

Berhane

et al. 2023

Membranes

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In this review, the state of the art of modified membranes developed and applied for the improved performance of redox flow batteries (RFBs) is presented and critically discussed. The review begins with an introduction to the energy-storing chemical principles and the potential of using RFBs in the energy transition in industrial and transport-related sectors. Commonly used membrane modification techniques are briefly presented and compared next. The recent progress in applying modified membranes in different RFB chemistries is then critically discussed. The relationship between a given membrane modification strategy, corresponding ex situ properties and their impact on battery performance are outlined. It has been demonstrated that further dedicated studies are necessary in order to develop an optimal modification technique, since a modification generally reduces the crossover of redox-active species but, at the same time, leads to an increase in membrane electrical resistance. The feasibility of using alternative advanced modification methods, similar to those employed in water purification applications, needs yet to be evaluated. Additionally, the long-term stability and durability of the modified membranes during cycling in RFBs still must be investigated. The remaining challenges and potential solutions, as well as promising future perspectives, are finally highlighted.

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Section: Electrodepositionmentioning

confidence: 99%

“…Moreover, electrodeposition encounters limitations in terms of the range of materials that can be deposited. The deposited layer may also exhibit instability under certain conditions, which can negatively impact membrane performance [31].…”

Section: Electrodepositionmentioning

confidence: 99%

Modified Membranes for Redox Flow Batteries—A Review

Tsehaye,

Tufa,

Berhane

et al. 2023

Membranes

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“…To enhance selectivity towards single-charged ions, studies have been conducted on altering the configuration of the membrane stack [3][4][5], including the use of nanofiltration membranes instead of cation-exchange membranes [5]. However, the overwhelming majority of research in this field is dedicated to modifying the properties of ion-exchange membranes through surface modification [6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Bulk Modification of the MF-4SK Membrane with Phosphorylated Hyper-Branched Dendrimer Bolthorn H20 on the Mechanisms of Electroconvection/Dissociation of Water and Specific Selectivity to Divalent Ions

Achoh,

Bondarev,

Nosova

et al. 2024

Electrochem

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This study focuses on the modification of ion-exchange membranes by incorporating a phosphorylated dendrimer into sulfonated polytetrafluoroethylene membranes to enhance the specific selectivity between mono-/divalent ions, using the Ca2+/Na+ pair as an example. This research employs mechanical, physicochemical, and electrochemical analyses to explore the effects of P-H20 incorporation on membrane properties. Bulk modification significantly increases membrane selectivity towards calcium ions (the specific permselectivity coefficient rises from 1.5 to 7.2), while maintaining the same level of the limiting current density. Other findings indicate that bulk modification significantly changes the transport-channel structure of the membrane and alters the mechanism of over-limiting mass transfer. The over-limiting current for the pristine membrane is mainly due to non-equilibrium electroconvection, while modified membranes actively participate in the water-splitting reaction, leading to the suppression of the electroconvection. Despite this drawback, the decrease of the over-limiting potential drop results in a decrease in specific energy consumption from 0.11 to 0.07 kWh/mol. In the underlimiting current mode, the specific energy consumption for all studied membranes remains within the same limits of 0.02–0.03 kWh/mol.

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“…Sata et al [9] reviewed the modification of CEMs for selectivity among cations in 2003. In 2017, Xu and co-workers [10] summarized monovalent cation selective membranes with an emphasis on fabrication strategies for diffusion dialysis and electrodialysis applications, while Khoiruddin et al [11] described approaches to surface modification of IEMs and monovalent ion selectivity. Luo et al [12] published a comprehensive review of IEMs in 2018, including the separation of both anions and cations, focusing on advancements in fabrication methods, ion transport mechanisms, and experimental methods to determine ion selectivity.…”

Section: Introductionmentioning

confidence: 99%

Cation Exchange Membranes and Process Optimizations in Electrodialysis for Selective Metal Separation: A Review

et al. 2023

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The selective separation of metal species from various sources is highly desirable in applications such as hydrometallurgy, water treatment, and energy production but also challenging. Monovalent cation exchange membranes (CEMs) show a great potential to selectively separate one metal ion over others of the same or different valences from various effluents in electrodialysis. Selectivity among metal cations is influenced by both the inherent properties of membranes and the design and operating conditions of the electrodialysis process. The research progress and recent advances in membrane development and the implication of the electrodialysis systems on counter-ion selectivity are extensively reviewed in this work, focusing on both structure–property relationships of CEM materials and influences of process conditions and mass transport characteristics of target ions. Key membrane properties, such as charge density, water uptake, and polymer morphology, and strategies for enhancing ion selectivity are discussed. The implications of the boundary layer at the membrane surface are elucidated, where differences in the mass transport of ions at interfaces can be exploited to manipulate the transport ratio of competing counter-ions. Based on the progress, possible future R&D directions are also proposed.

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Cited by 4 publications

References 0 publications

Modified Membranes for Redox Flow Batteries—A Review

Modified Membranes for Redox Flow Batteries—A Review

The Effect of Bulk Modification of the MF-4SK Membrane with Phosphorylated Hyper-Branched Dendrimer Bolthorn H20 on the Mechanisms of Electroconvection/Dissociation of Water and Specific Selectivity to Divalent Ions

Cation Exchange Membranes and Process Optimizations in Electrodialysis for Selective Metal Separation: A Review

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