 Conversion anodes which can form compound with potassium ion with boosted storage capacity and reversibility have also been studied to fit for potassium-ion battery.To buffer the volume change of conversion anode, a carbon material matrix is always applied such as MoS2@rGO, Sb2S3-SNG, SnS2-rGO and so on.Classic alloying anodes such as Si, Sb and Sn that can form alloy with lithium ion during cycling process are also applicable for potassium-ion battery.