Quinones for redox flow batteries

Symons, Peter

doi:10.1016/j.coelec.2021.100759

Cited by 24 publications

(28 citation statements)

References 35 publications

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“…As the development and optimization of an organic redox system are not the objective of this work, we chose a known and accessible pair of compounds among quinones, widely studied in the AORFB context though we are aware of their intrinsic problems that lead to capacity fading. [ 37 ] Our AORFB is based on alizarin red S and tiron solutions as anolyte and catholyte ( Figure A), respectively. Alizarin red S has a redox potential of −0.08 V (vs AgCl/Cl) and tiron has a redox potential of 0.69 V (vs AgCl/Cl); [ 38 ] hence the expected open‐circuit potential of the redox flow cell should be 0.77 V. We compare the behavior of commercial Nafion 115 (thickness 127 μm) and our sulfonated cellulose (thickness 20 μm) membranes as selective membranes in the same AORFB architecture with this redox pair.…”

Section: Resultsmentioning

confidence: 99%

Sulfonated Cellulose Membranes Improve the Stability of Aqueous Organic Redox Flow Batteries

Lander

Vagin

Gueskine

et al. 2022

Adv Energy and Sustain Res

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The drawbacks of current state‐of‐the‐art selective membranes, such as poor barrier properties, high cost, and poor recyclability, limit the large‐scale deployment of electrochemical energy devices such as redox flow batteries (RFBs) and fuel cells. In recent years, cellulosic nanomaterials have been proposed as a low‐cost and green raw material for such membranes, but their performance in RFBs and fuel cells is typically poorer than that of the sulfonated fluoropolymer ionomer membranes such as Nafion. Herein, sulfonated cellulose nanofibrils densely cross‐linked to form a compact sulfonated cellulose membrane with limited swelling and good stability in water are used. The membranes possess low porosity and excellent ionic transport properties. A model aqueous organic redox flow battery (AORFB) with alizarin red S as negolyte and tiron as posolyte is assembled with the sulfonated cellulose membrane. The performance of the nanocellulose‐based battery is superior in terms of cyclability in comparison to that displayed by the battery assembled with commercially available Nafion 115 due to the mitigation of crossover of the redox‐active components. This finding paves the way to new green organic materials for fully sustainable AORFB solutions.

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Section: Resultsmentioning

confidence: 99%

Sulfonated Cellulose Membranes Improve the Stability of Aqueous Organic Redox Flow Batteries

Lander

Vagin

Gueskine

et al. 2022

Adv Energy and Sustain Res

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“…Quinone-based molecules have attracted considerable attention as they have tuneable redox potentials, good electrochemical reversibility and reaction rates in a broad pH range 12 – 17 . For instance, dihydroxyanthraquinone (DHAQ) derivatives generally have 2-electron reduction at relatively low potentials and thus have been explored as anolyte for AORFBs 18 , while the poor chemical stability and water solubility limit their application 12 , 17 . Although a good progress has been made by introducing functional groups to DHAQs to enhance the solubility and stability, the overall EES performance is still not satisfactory 13 , 14 , 19 , 20 .…”

Section: Introductionmentioning

confidence: 99%

Molecular engineering of dihydroxyanthraquinone-based electrolytes for high-capacity aqueous organic redox flow batteries

et al. 2022

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Aqueous organic redox flow batteries (AORFBs) are a promising technology for large-scale electricity energy storage to realize efficient utilization of intermittent renewable energy. In particular, organic molecules are a class of metal-free compounds that consist of earth-abundant elements with good synthetic tunability, electrochemical reversibility and reaction rates. However, the short cycle lifetime and low capacity of AORFBs act as stumbling blocks for their practical deployment. To circumvent these issues, here, we report molecular engineered dihydroxyanthraquinone (DHAQ)-based alkaline electrolytes. Via computational studies and operando measurements, we initially demonstrate the presence of a hydrogen bond-mediated degradation mechanism of DHAQ molecules during electrochemical reactions. Afterwards, we apply a molecular engineering strategy based on redox-active polymers to develop capacity-boosting composite electrolytes. Indeed, by coupling a 1,5-DHAQ/poly(anthraquinonyl sulfide)/carbon black anolyte and a [Fe(CN)6]3−/4− alkaline catholyte, we report an AORFB capable of delivering a stable cell discharge capacity of about 573 mAh at 20 mA/cm2 after 1100 h of cycling and an average cell discharge voltage of about 0.89 V at the same current density.

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“…[12][13][14][15] In particular, acidic supporting electrolytes have been widely used because they helped to increase the solubility of active materials and the ion conductivity of electrolytes. [16][17][18][19] With that, the energy density and efficiencies of ARFBs using them were improved. Even in an economical prospect, acidic supporting electrolyte is generally cheap, and thus, the cost of ARFB system using acidic supporting electrolyte can be considerably relieved.…”

Section: Introductionmentioning

confidence: 99%

Redox flow batteries using cerium salts and anthraquinone‐2,7‐disulfonic acid as new redox couple dissolved in mixture solution of methanesulfonic and perchloric acids

Permatasari

Lee

Kwon

2022

Intl J of Energy Research

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Summary Aqueous redox flow batteries (ARFBs) using acidic supporting electrolytes are one of promising future batteries because the acidic supporting electrolytes can increase the solubility of active materials and their ionic conductivity, followed by energy density and efficiencies of ARFBs using these. Nevertheless, discovering proper redox couple with a high open circuit voltage (OCV) in acidic media is still challengeable because a low OCV is a main drawback of the conventional redox couples dissolved in acidic media. To increase OCV without sacrificing the solubility of active materials, a new redox couple consisting of cerium salts and anthraquinone‐2,7‐disulfonic acid (AQDS) that are dispersed in methanesulfonic acid (MSA) is suggested. With cerium salts and AQDS dissolved in acidic MSA, a high OCV of 1.45 V is achieved, while MSA affects the increases in solubility and stability of cerium salts. To further increase the solubility of AQDS and facilitate its redox reactivity, the mixture of MSA and perchloric acid (HClO4) is used as supporting electrolyte. Based on that, the solubility of AQDS is improved from 0.35 to 0.5 M, while ARFB using 1 M cerium ions and 0.5 M AQDS dissolved in the mixture solution of 4 M MSA and 1 M HClO4, shows excellent performances such as discharge capacity of 20.3 Ah L−1, energy efficiency of 86.5%, and capacity retention of ~99% over 100 cycles.

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Quinones for redox flow batteries

Cited by 24 publications

References 35 publications

Sulfonated Cellulose Membranes Improve the Stability of Aqueous Organic Redox Flow Batteries

Sulfonated Cellulose Membranes Improve the Stability of Aqueous Organic Redox Flow Batteries

Molecular engineering of dihydroxyanthraquinone-based electrolytes for high-capacity aqueous organic redox flow batteries

Redox flow batteries using cerium salts and anthraquinone‐2,7‐disulfonic acid as new redox couple dissolved in mixture solution of methanesulfonic and perchloric acids

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