Ionic Liquid and Ionanofluid-Based Redox Flow Batteries—A Mini Review

Joseph, Aswathy; Sobczak, Jolanta; Żyła, Gaweł; Mathew, Suresh

doi:10.3390/en15134545

Cited by 22 publications

(23 citation statements)

References 66 publications

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“…A typical V-RFB system consists of electrodes (anode and cathode), electrolyte, ion membrane, circulation pumps, and storage tanks as shown in Fig. 1 [75], [76]. The electrodes which are separated by the membrane are housed in the cell stack while the circulation pump is used in each half cell (positive and negative) to drive the electrolyte from the storage tank into the cell stack where the electrochemical reaction occur.…”

Section: A Operation Of V-rfbsmentioning

confidence: 99%

A Review on Vanadium Redox Flow Battery Storage Systems for Large-Scale Power Systems Application

Aluko

Knight

2023

IEEE Access

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In the wake of increasing the share of renewable energy-based generation systems in the power mix and reducing the risk of global environmental harm caused by fossil-based generation systems, energy storage system application has become a crucial player to offset the intermittence and instability associated with renewable energy systems. Due to the capability to store large amounts of energy in an efficient way, redox flow batteries (RFBs) are becoming the energy storage of choice for large-scale applications. Vanadium-based RFBs (V-RFBs) are one of the upcoming energy storage technologies that are being considered for large-scale implementations because of their several advantages such as zero cross-contamination, scalability, flexibility, long life cycle, and non-toxic operating condition. This review presents the current state of the V-RFB technology for power system applications. The basic working operation of the V-RFB system with the principle of operation of its major components, the design considerations, and the limitations of each component are discussed. It presents technical information to improve the overall performance of the V-RFB by considering the materials of the cell components, modeling methods, stack design, flow rate optimization, and shunt current reduction.INDEX TERMS Energy storage system, flow battery, renewable energy, vanadium redox flow battery.

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Section: A Operation Of V-rfbsmentioning

confidence: 99%

A Review on Vanadium Redox Flow Battery Storage Systems for Large-Scale Power Systems Application

Aluko

Knight

2023

IEEE Access

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“…Finally, redox flow batteries store energy by electrolyte couples in external two reservoirs rather than electrodes which only facilitate electron exchange in a flow cell. 112 By decoupling electrochemistry and storage, 107 the modular design of electrolyte reservoirs and cell stacks contributes to their flexibility for stationary applications with customized energy and power demands. This section provides a comprehensive review of the various roles of ionic liquids as electrolytes in these three types of batteries.…”

Section: Ils As Electrolytes For Batteriesmentioning

confidence: 99%

Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

Zhou,

Gui,

Sun

et al. 2023

Chem. Rev.

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Ionic liquids (ILs) consisting entirely of ions exhibit many fascinating and tunable properties, making them promising functional materials for a large number of energy-related applications. For example, ILs have been employed as electrolytes for electrochemical energy storage and conversion, as heat transfer fluids and phase-change materials for thermal energy transfer and storage, as solvents and/or catalysts for CO2 capture, CO2 conversion, biomass treatment and biofuel extraction, and as high-energy propellants for aerospace applications. This paper provides an extensive overview on the various energy applications of ILs and offers some thinking and viewpoints on the current challenges and emerging opportunities in each area. The basic fundamentals (structures and properties) of ILs are first introduced. Then, motivations and successful applications of ILs in the energy field are concisely outlined. Later, a detailed review of recent representative works in each area is provided. For each application, the role of ILs and their associated benefits are elaborated. Research trends and insights into the selection of ILs to achieve improved performance are analyzed as well. Challenges and future opportunities are pointed out before the paper is concluded.

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“…Redox‐active ionic liquids are attracting increasing attention in the scientific literature (Figure 1) due to their potential utility as energy harvesting and storage materials [1–3] . In particular, they possess a number of characteristics that make them ideal redox flow battery electrolytes: high concentrations of redox‐active species and charge carriers, tunable redox potentials, low vapour pressures, and excellent thermal and chemical stabilities [1,4,5] . However, their practical utility is hampered by low ionic conductivities and the high cost of preparing bulk quantities of custom‐designed, redox‐functionalised ionic liquids [1,3] .…”

Section: Introductionmentioning

confidence: 99%

“…However, their practical utility is hampered by low ionic conductivities and the high cost of preparing bulk quantities of custom‐designed, redox‐functionalised ionic liquids [1,3] . For a comprehensive overview of the properties of aprotic redox‐active ionic liquids and their potential applications in redox flow batteries, the interested reader is referred to a recent series of review articles and the references contained within [1,3,5,6] …”

Section: Introductionmentioning

confidence: 99%

Acid‐Base Chemistry Provides a Simple and Cost‐Effective Route to New Redox‐Active Ionic Liquids

Smith

Crittenden

2023

Chemistry An Asian Journal

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Redox‐active ionic liquids (RAILs) hold great promise as high density electrochemical energy storage materials, but are hampered by high costs and low bulk conductivities. In this work, we introduce and electrochemically characterise novel redox‐active protic ionic liquids (RAPILs) formed by acid‐base neutralisation from cheap and plentiful starting materials. We also demonstrate a novel RAIL‐in‐IL solvent system for electrochemical characterisation of RAPILs, which enables efficient and cost‐effective determination of redox potentials and screening for electrochemical reversibility. Of the redox‐active ionic liquids tested in this work, only propylammonium 4‐nitrophenylacetate demonstrates completely reversible electrochemistry and preservation of ionic character upon redox cycling under acidic or neutral conditions. Propylammonium 2,5‐dihydroxyphenyl‐carboxylate also demonstrates two reversible redox processes, but is unstable to oxidation at 0.27 V vs Ag (−0.14 V vs Fc), most likely forming an uncharged benzoquinone species. Using the lessons learned from this prototypical set of RAPILs, we propose design criteria to guide future experimental and computational work.

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Ionic Liquid and Ionanofluid-Based Redox Flow Batteries—A Mini Review

Cited by 22 publications

References 66 publications

A Review on Vanadium Redox Flow Battery Storage Systems for Large-Scale Power Systems Application

A Review on Vanadium Redox Flow Battery Storage Systems for Large-Scale Power Systems Application

Energy Applications of Ionic Liquids: Recent Developments and Future Prospects

Acid‐Base Chemistry Provides a Simple and Cost‐Effective Route to New Redox‐Active Ionic Liquids

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