Needle coke options low price, excessive carbon yield, and good electrical conductivity. It’s thought of a promising precursor for the carbon anode for sodium-ion batteries, however poor structural tunability and inferior efficiency restrict additional growth. Herein, we report a facile technique to attain needle coke-derived laborious carbon (NCAPS) with multiscale buildings through activation with ammonium persulfate (APS). Systematic characterization revealed that ammonium persulfate activation launched applicable oxygen-containing practical teams on the floor of needle coke, whereas making a turbostratic microstructure with balanced defect density and mesopores, thereby supplying plentiful adsorption websites of Na+ and bettering electrochemical efficiency. Benefiting from its applicable construction and chemical composition, NCAPS exhibited a reversible capability of 212.6 mAh g−1 after 200 cycles at 0.2C, which was 37% greater than non-activated needle coke-derived laborious carbon, and a very good price functionality of 195.0 mAh g−1 at 5C. We utilized APS-assisted activation to allow multiscale structural optimization, thereby considerably enhancing Na+ storage kinetics and electrochemical efficiency. Herein, we offer a light activation method for designing a high-performance sodium-ion battery laborious carbon anode from a low-cost and extremely fragrant precursor.
