Vanadium Redox Flow Battery

V2+ + VO2+ + 2H+ ⇌ V3+ + VO2+ + H2O

Übersicht

The vanadium redox flow battery (VRFB) uses four oxidation states of vanadium (V²⁺/V³⁺ and VO²⁺/VO₂⁺) in two electrolyte tanks. During discharge, V²⁺ is oxidized to V³⁺ at the negative electrode while VO₂⁺ is reduced to VO²⁺ at the positive electrode. Using the same element eliminates cross-contamination.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Reaktant Vanadium V 1 (aq)
Produkt Water H₂O 1 (l)

Alltägliches Beispiel

Large VRFB installations store renewable energy from wind and solar farms, releasing it when the sun is not shining or wind is not blowing.

Industrielle Bedeutung

Vanadium flow batteries are used for grid-scale energy storage with capacities up to hundreds of MWh. They offer 20+ year lifetimes and unlimited cycling.

Eigenschaften

Typ
Redox
Reversibel
Ja
Energie
Exotherm
ΔH
-121,0 kJ/mol

Verwandte Reaktionen

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Hydrogen Peroxide Disproportionation Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Vanadium Redox Flow Battery?
The balanced equation is: V²⁺ + VO₂⁺ + 2H⁺ ⇌ V³⁺ + VO²⁺ + H₂O.
What type of reaction is Vanadium Redox Flow Battery?
Vanadium Redox Flow Battery is a redox reaction. It is reversible under certain conditions.
Is Vanadium Redox Flow Battery exothermic or endothermic?
Vanadium Redox Flow Battery is exothermic (releases energy). The enthalpy change (ΔH) is -121.0 kJ/mol.