Synthesis and sodium storage performance of Sb porous nanostructure

Porous Sb nanostructure has been prepared via a magnesiothermic reduction reaction and a succedent HCl solution etching process. The Sb product is made up of connected uniform porous particles. The pores have an average pore size of ∼80 nm. Sodium storage performance of porous Sb product has been investigated. An initial reversible capacity of 570.3 mAh/g was obtained at 50 mA/g. At the 50th cycle, a reversible capacity of 538.7 mAh/g was retained, corresponding to a high retention rate of 94.5%.