Encapsulating biomass-derived SiOx with internal conductive channels in nitrogen-doped flexible carbon cages for high performance Li ion-battery anodes

N-doped flexible porous carbon encapsulated SiO x /C (p-NC/SiO x /C-3) was synthesized using rice husks as both the silicon and carbon source. When utilized as an anode for lithium ion batteries, p-NC/SiO x /C-3 delivers excellent cycling performance.