Rice Husk as the Source of Silicon/Carbon Anode Material and Stable Electrochemical Performance

Abstract Herein, a magnesiothermic reduction strategy is employed to synthesize three‐dimensional structured silicon/carbon (Si/C) material, using rice husk as raw materials. The composition and morphology of Si/C material are investigated by XRD, Raman, SEM and TEM. The unique structure benefits from the naturally conductive network of biomass carbon, and ensures the excellent electrochemistry performance. Utilizing for lithium‐ion batteries (LIBs) anode material, this Si/C composite behaves good cycling stability (537 mA h g −1 after 200 cycles at a current density of 0.1 A g −1 ), and enhanced rate capacity (640.31,521.6,415.88, and 331.71 mA h g −1 at current densities of 0.1, 0.2, 0.5 and 1 A g −1 , respectively). Our research exhibits a new strategy for preparing low‐cost and environmental‐friendly Si/C material and possesses enormous potential to be extended to other biomass anode materials.