Exhausting carbon and antimony (Sb) are two promising anode candidates for future potassium-ion batteries. Herein, we efficiently resolve the low-capacity drawback of extremely conductive carbon and poor cyclic stability of high-capacity Sb via uniformly dispersing and embedding the sub-nano and nanoscale Sb particles (~36.4wt.%) inside nitrogen-doped two-dimensional laborious carbon nanosheets to kind a multi-scale carbon@Sb mesoporous composite, marked as Sb3@HCNS. The electrochemical outcomes present that the optimized Sb3@HCNS anode displays an distinctive potassium-ion storage efficiency, delivering a reversible capability of 580.8, 413.0, and 215.5 mA h g-1 on the present density of 0.1, 1, and 4 A g-1, respectively. Moreover, it nonetheless maintains a excessive capability of 382 mA h g−1 at a excessive present density of two A g-1 after 1000 cycles. The characterization outcomes additional manifest that the in-situ localized electrochemical pulverization activation of Sb through the (de)alloying course of and the pseudo-capacitive impact of excellent digital conductive laborious carbon nanosheets are primarily answerable for the distinctive properties of Sb3@HCNS. Along with its controllable preparation technique, the newly-developed Sb3@HCNS composite is anticipated to be a promising anode materials for high-performance potassium-ion batteries.
