For this testing, we coated the rice husk silicon with carbon layers (3-10 nm) to compensate for the intrinsically low electronic conductivity of silicon as shown in previous studies," explains Choi. "We found that this carbon-coated rice husk silicon anode material shows excellent discharge capacity retention during cycling using the stable interconnected porous structure. Its cycling performance is clearly better than those of bare silicon nanoparticles and carbonized polydopamine-coated silicon nanoparticles.