More information: Weihao Li et al, Reversible K-ion intercalation in CrSe 2 cathodes for potassium-ion batteries: combined operando PXRD and DFT studies, Journal of Materials Chemistry A (2024 ...

They have identified a combination of chromium and selenium as a likely replacement. Its a finding that could help to bring the unique packs to market as competition for common lithium-ion ones ...