Vanadium Redox Flow Battery

V2+ + VO2+ + 2H+ ⇌ V3+ + VO2+ + H2O

Visão geral

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.

Participantes

Papel Substância Coeficiente Estado
Reagente Vanadium V 1 (aq)
Produto Water H₂O 1 (l)

Exemplo do cotidiano

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

Importância industrial

As baterias de fluxo de vanádio são utilizadas para armazenamento de energia à escala da rede com capacidades até centenas de MWh. Oferecem mais de 20 anos de vida útil e ciclos ilimitados.

Propriedades

Tipo
Redox
Reversível
Sim
Energia
Exotérmico
ΔH
-121,0 kJ/mol

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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.