Effect of the redox reactivity of vanadium ions enhanced by phosphorylethanolamine based catalyst on the performance of vanadium redox flow battery

Noh, Chanho; Kwon, Byeong Wan; Chung, Yongjin; Kwon, Yongchai

doi:10.1016/j.jpowsour.2018.10.042

Cited by 47 publications

(32 citation statements)

References 42 publications

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“…[1][2][3][4] In charged vanadium redox flow batteries (VRFB), one half cell is filled with a solution containing V 2+ ions, while the other half cell contains a solution with V 5+ ions. [5][6][7] During discharge, V 2+ is oxidized to V 3+ , and V 5+ is reduced to V 4+ . The opposite reactions take place when the cell is charged.…”

Section: Introductionmentioning

confidence: 99%

Layered composite membranes based on porous PVDF coated with a thin, dense PBI layer for vanadium redox flow batteries

Lee

Jung

Serhiichuk

et al. 2019

Journal of Membrane Science

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A commercial porous polyvinylidene fluoride membrane (pore size 0.65 μm, nominally 125 µm thick) is spray coated with 1.2 -4 µm thick layers of polybenzimidazole. The area resistance of the porous support is 36.4 mΩ cm 2 in 2M sulfuric acid, in comparison to 540 mΩ cm 2 for a 27 µm thick acid doped polybenzimidazole membrane, and 124 mΩ cm 2 for PVDF-P20 (4 µm thick blocking layer). Addition of vanadium ions to the supporting electrolyte increases the resistance, but less than for Nafion. The expected reason is a change in the osmotic pressure when the ionic strength of the electrolyte is increased, reducing the water contents in the membrane. The orientation of the composite membranes has a strong impact. Lower permeability values are found when the blocking layer is oriented towards the vanadium-lean side in ex-situ measurements. Cells with the blocking layer on the positive side have significantly lower capacity fade, also much lower than cells using Nafion 212. The coulombic efficiency of cells with PVDF-PBI membranes (98.4%) is higher than that of cells using Nafion 212 (93.6%), whereas the voltage efficiency is just slightly lower, resulting in energy efficiencies of 85.1 and 83.3%, respectively, at 80 mA/cm 2 .

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Section: Introductionmentioning

confidence: 99%

Layered composite membranes based on porous PVDF coated with a thin, dense PBI layer for vanadium redox flow batteries

Lee

Jung

Serhiichuk

et al. 2019

Journal of Membrane Science

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“…The electrocatalytic effect of CNTs in the VRFB was first reported by Zhu et al (2008). Recently, a new electrocatalyst phosphoryl ethanolamine (PHOS) doped CNT was reported by Noh et al (2018) in which the comparative performance of VRFB based on CNT, POH‐CNT, and carboxylic acid functionalized CNT (CR‐CNT) as electrocatalyst coated over the graphite felt were discussed. Due to the chelation ability of phosphate groups, low electron delocalization capability, and high acid dissociation constant, the POH‐CNT showed superior electrocatalytic activity toward VO 2+ /VO 2 + in comparison to CNT and CR‐CNT.…”

Section: Electrocatalysts Used In Vrfbmentioning

confidence: 99%

Recent progress on carbon and metal based electrocatalysts for vanadium redox flow battery

Singh¹,

Kapoor

Verma

2020

WIREs Energy & Environment

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Attractive features of vanadium redox flow battery (VRFB) such as long durability, easy scalability, and low levelized cost of energy have influenced its prominence in the sectors where renewable energy is to be stored at a large scale. However, viability of VRFB to be used for a wide‐range of applications such as household electrification, electric vehicle charging infrastructure, and so on has been limited by its low power density. In principle, the power density of VRFB is dependent upon rate of electrochemical reaction on the electrode. The electrochemical properties of the electrode can be improved either by pretreatment of the electrode or by depositing electrocatalyst on the electrode. The use of electrocatalyst helps to lower overpotential losses and reduces the charge‐transfer resistance, which results the VRFB to operate at higher current densities. This review discusses the development and progress of carbon and metal‐based electrocatalyst that have been used for VRFB applications. This article is categorized under: Fuel Cells and Hydrogen > Science and Materials Energy Efficiency > Science and Materials Energy and Development > Science and Materials

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“…However, VRFBs have still some serious hurdles 23‐30 . First is the high cost of vanadium because this is a rare metal 23 .…”

Section: Introductionmentioning

confidence: 99%

“…V 5+ ions are precipitated when the operating temperature of VRFB is above 40°C, while the precipitation of V 3+ ions occurs when the temperature is below −10°C 24,25 . Third is that a catalyst is ultimately needed for incorporating the high performance VRFBs because only catalyst can overcome the slow redox reactivity issue of V 4+ /V 5+ redox reaction and the possibility of hydrogen evolution 26‐30 …”

Section: Introductionmentioning

confidence: 99%

High power density near‐neutral pH aqueous redox flow batteries using zinc chloride and 4,5‐dihydroxy‐1,3‐benzenedisulfonate as redox couple with polyethylene glycol additive

2021

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Summary Redox flow batteries (RFBs) using zinc chloride (ZnCl2) and 4,5‐dihydroxy‐1,3‐benzenedisulfonate (Tiron) redox couple is introduced. ZnCl2 and Tiron are used as negative and positive active materials, which are dissolved in near‐neutral pH, ammonium chloride (NH4Cl) supporting electrolyte. Cell voltage of RFB using ZnCl2 and Tiron is extremely high as 1.8 V, while two cellulose spacers are introduced to prevent the growth of zinc dendrite on the membrane. When the performances of RFBs using ZnCl2 and Tiron are measured, their charge efficiency (CE), voltage efficiency (VE), and energy efficiency (EE) are 95, 79, and 75% at 40 mA cm−2, whereas their capacity fading rate is high as 0.12 Ah L−1 per cycle. This is due to the zinc dendrite formed on the electrode of RFB that is attributed to the aggregation of zinc ions. To suppress the aggregation and to preserve active sites for the redox reaction of zinc ions during cycling, the polyethylene glycol (PEG) additive is suggested. Regarding the optimization of PEG, 5000 ppm PEG induces both high efficiencies (97, 81, and 79% of CE, VE, and EE at 40 mA cm−2) and low capacity loss rate (0.03 Ah L−1 per cycle), which are more enhanced performances than those of RFBs operated without PEG. In terms of power density of RFB using ZnCl2 and Tiron, high power density of 144 mW cm−2 is achieved under 120 mA cm−2, which is far better performance than that of other RFBs operated under near‐neutral pH electrolyte.

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Effect of the redox reactivity of vanadium ions enhanced by phosphorylethanolamine based catalyst on the performance of vanadium redox flow battery

Cited by 47 publications

References 42 publications

Layered composite membranes based on porous PVDF coated with a thin, dense PBI layer for vanadium redox flow batteries

Layered composite membranes based on porous PVDF coated with a thin, dense PBI layer for vanadium redox flow batteries

Recent progress on carbon and metal based electrocatalysts for vanadium redox flow battery

High power density near‐neutral pH aqueous redox flow batteries using zinc chloride and 4,5‐dihydroxy‐1,3‐benzenedisulfonate as redox couple with polyethylene glycol additive

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