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Potassium-ion battery

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Technology Description

Potassium-ion (K-ion) also has the same working principle as Li-ion and Na-ion with the cation being potassium. K-ion also relies on abundant materials for its leading cathode and anode materials (which contain no lithium, nickel, nor cobalt), and thus, similarly to sodium-ion chemistries, they would come with significant potential to reduce critical mineral demand. Unlike Na-ion, K-ion can use graphite anodes which means it can use the graphite anode supply chains developed for Li-ion. There are indications that K-ion has superior rate capability (that is, it suffers from little voltage loss even at high current loads) compared to Li-ion.

Relevance for Net Zero

See rationale for sodium-ion batteries. Contains no lithium or critical minerals in leading anode and cathode materials. Potassium is highly abundant and more globally distributed than lithium.

Key Countries

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