Nitrogen-Doped Carbon/SiO x Composites from Rice Husks as a High-Performance Anode for Lithium-ion Batteries

Abstract

To promote the application of rice husks for commercial anode materials, nitrogen-doped carbon/SiOx (N-C/SiOx) composites were prepared from rice husks using ZnCl2 as morphology control agent and via a simple magnesiothermic reduction method. The composites exhibit high reversible capacity (1110 mAh g-1 at 100 mAg-1), excellent cycling stability and outstanding rate performance. The structure consisted of nanoparticles can release the stress generated during volume expansion timely. In addition, carbon provides good electronic conductivity and reduce the side reaction. The rice husks-drived N-C/SiOx composites with excellent electrochemical performance, which provide a promise for commercial of Si-based anode materials.