Vanadium Redox Flow Battery

V2+ + VO2+ + 2H+ ⇌ V3+ + VO2+ + H2O

अवलोकन

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.

प्रतिभागी

भूमिका पदार्थ गुणांक अवस्था
अभिकारक Vanadium V 1 (aq)
उत्पाद Water H₂O 1 (l)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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.

गुण

प्रकार
Redox
प्रतिवर्ती
हाँ
ऊर्जा
ऊष्माक्षेपी
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.