An anode material incorporating a sulfide is reported. SnS₂ nanoparticles anchored onto reduced graphene oxide are produced via a chemical route and demonstrate an impressive capacity of 350 mA h g⁻¹, exceeding the capacity of graphite. These results open the door for a new class of high capacity anode materials (based on sulfide chemistry) for potassium-ion batteries.

A highly stable Na ⁺ ion battery anode was prepared by deposition of hydroperoxostannate on graphene oxide from H ₂ O ₂ -rich solution followed by sulfidization and heat treatment.