Superior electrochemical properties of Co3O4 yolk–shell powders with a filled core and multishells prepared by a one-pot spray pyrolysis

Abstract

Highly crystalline Co₃O₄ yolk–shell powders with a filled core and various shell numbers are prepared by a simple one-pot spray pyrolysis process. Co₃O₄ yolk–shell powders exhibited a high initial discharge capacity of 548 mA h g⁻¹ and retained their capacities very well, even at a high discharge rate of 10 000 mA g⁻¹.