Preparation and lithium storage performance of yolk–shell Si@void@C nanocomposites

Abstract

Yolk–shell Si@void@C nanocomposites are prepared via a facile method of resorcinol-formaldehyde coating and LiOH etching, without SiO₂ pre-modification on Si particles, expensive carbon sources, or environmentally-unfriendly HF solutions. Profiting from these favorable features, Si@void@C nanocomposites exhibit considerable reversible capacities (628 mA h g⁻¹ after 100 cycles) and good rate performances.