Vanadium redox flow batteries are the most commercially mature LDES technology available in 2026. VRFBs store energy in liquid electrolytes containing vanadium ions in different oxidation states — V²⁺/V³⁺ at the anode, V⁴⁺/V⁵⁺ at the cathode — separated by an ion-exchange membrane.
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All-vanadium liquid flow batteries are safe, stable, non-flammable and explosive, and the electrolyte can be recycled. The battery itself can have a service life of up to 30 years. It also has the advantages of large energy storage capacity and high output power.
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A technology which is gaining significant attention is the vanadium-flow battery, known for its potential to revolutionise grid-scale energy storage.
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The DRC holds a substantial amount of the world's cobalt reserves, a key material in lithium-ion batteries.
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