Regulating the microstructure of hard carbon (HC) anodes has emerged as a popular strategy to enhance the application potential of sodium-ion batteries (SIBs). However, the low platform capacity and inferior rate property remain significant barriers to their further development. Herein, HC materials with abundant ultramicropores (0.3-0.8 nm) are prepared employed epoxy resin and zinc acetate as precursors. Benefiting from the abundant hydroxyl and epoxy groups, the synergistic generation of simple aromatic free radicals and the precipitated ZnO...
