Vanadium Redox Flow Battery

V2+ + VO2+ + 2H+ ⇌ V3+ + VO2+ + H2O

Tổng quan

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.

Người tham gia

Vai trò Chất Hệ số Trạng thái
Chất phản ứng Vanadium V 1 (aq)
Sản phẩm Water H₂O 1 (l)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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.

Tính chất

Loại
Redox
Thuận nghịch
Có
Năng lượng
Tỏa nhiệt
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.