Facile preparation of silicon hollow spheres and their use in electrochemical capacitive energy storage†
Abstract
Nanostructured silicon hollow spheres with a thin shell have been synthesized by magnesium reduction of silica spheres, which possess a high BET surface area and are electrochemically active in capacitive energy storage with a maximum specific capacitance of 193 F gā1 in the neutral Na2SO4 aqueous solution.