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

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.