Construction of three-dimensional ZnCo2O4 hierarchical nanocubes for enhanced lithium storage performances

Abstract Three-dimensional (3D) transition metal oxides have been intensively researched as the potential electrode materials for high capacity lithium storage. Herein, the 3D hierarchical ZnCo2O4 consists of many nanocubes which are constructed through a facile hydrothermal method combined calcination process. Such 3D hierarchical nanocube structures with abundant porous can effectively relieve large volume change and facilitate the transportation of ions and electrons under cycling process. Consequently, the 3D ZnCo2O4 nanocubes as electrode materials deliver high reversible specific capacities of 775 mAh g−1 after 100 cycles at a large current density of 500 mA g−1 and superior rate capability.