Outlook on K-ion batteries

Potassium-ion batteries (KIBs) are a promising complementary technology to lithium-ion batteries (LIBs), and can also use graphite anodes, thus providing a critical advantage over sodium-ion batteries (NIBs).

This paper runs through the most promising cathodes, anodes and electrolytes to date, and also presents a concise techno-economic model to critically compare the most promising KIB chemistries and evaluate if they can compete with leading NIBs and LIBs.

The paper also identifies five critical research challenges that need to be addressed for KIBs to become a viable technology.