 Whereas with different kinetics, graphite anodes suffer from low capacity retention during cycling within potassium-ion batteries.Thus, the approach of structure engineering of graphite anode is needed to achieve stable performance.Other types of carbonaceous materials besides graphite have been employed as anode material for potassium-ion battery, such as expanded graphite, carbon nanotubes, carbon nanofibers and also nitrogen or phosphorus-doped carbon materials.