Effect of the presence of solid particles, on the vanadyl sulfate (VOSO4) oxidation current

Moyeme, C.Y. Sano; Hage, Ranine El; Hassan, Ali; Chauvet, Fabien; Cassayre, Laurent; Biscans, Béatrice; Quaranta, D.; Tzedakis, Théodore

doi:10.1016/j.electacta.2021.137909

Cited by 1 publication

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References 17 publications

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“…Energy is stored in the electroactive material dissolved in the electrolyte and stored in tanks outside of the stack. The energy density is solely depending upon the amount of the electroactive material [1] . Therefore, flow batteries can be easily aligned with the energy demand by changing the electrolyte volume and the storage installation [2] …”

Section: Introductionmentioning

confidence: 99%

The Role of Oxygenic Groups and sp³ Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

et al. 2021

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Graphite felt is a widely used electrode material for vanadium redox flow batteries. Electrode activation leads to the functionalization of the graphite surface with epoxy, OH, C=O, and COOH oxygenic groups and changes the carbon surface morphology and electronic structure, thereby improving the electrode's electroactivity relative to the untreated graphite. In this study, density functional theory (DFT) calculations are conducted to evaluate functionalization's contribution towards the positive half‐cell reaction of the vanadium redox flow battery. The DFT calculations show that oxygenic groups improve the graphite felt's affinity towards the VO2+/VO2+ redox couple in the following order: C=O>COOH>OH> basal plane. Projected density‐of‐states (PDOS) calculations show that these groups increase the electrode's sp3 hybridization in the same order, indicating that the increase in sp3 hybridization is responsible for the improved electroactivity, whereas the oxygenic groups’ presence is responsible for this sp3 increment. These insights can aid the selection of activation processes and optimization of their parameters.

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Section: Introductionmentioning

confidence: 99%

The Role of Oxygenic Groups and sp³ Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

et al. 2021

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Effect of the presence of solid particles, on the vanadyl sulfate (VOSO4) oxidation current

Cited by 1 publication

References 17 publications

The Role of Oxygenic Groups and sp³ Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

The Role of Oxygenic Groups and sp³ Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

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Effect of the presence of solid particles, on the vanadyl sulfate (VOSO4) oxidation current

Cited by 1 publication

References 17 publications

The Role of Oxygenic Groups and sp3 Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

The Role of Oxygenic Groups and sp3 Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

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Product

Resources

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The Role of Oxygenic Groups and sp³ Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries

The Role of Oxygenic Groups and sp³ Carbon Hybridization in Activated Graphite Electrodes for Vanadium Redox Flow Batteries