The event of arduous carbon supplies with excessive plateau capability as anode supplies for sodium-ion batteries (SIBs) is essential to enhancing the power density of SIBs, whereas the closed pores are intently associated to the low-voltage (< 0.1 V) plateau capability of arduous carbon anodes. Herein, by a easy ZnO template technique and acid therapy, a wealth of closed pores have been created within the arduous carbon materials derived from camellia shells. Experimental outcomes reveal the mechanism of sodium ions adsorption on the defect websites and the formation of sodium clusters within the closed pores, which corresponds to the slope area and the plateau area, respectively. Notably, being benefited to the appreciable closed-pore content material and appropriate microstructure, the optimized pattern reveals a excessive reversible capability of 340 mAh g-1, which is especially contributed by the low-voltage plateau course of (53%). This work offers a brand new technique for exactly regulating the microstructure of biomass-derived arduous carbon for sodium-ion storage.
