Controlled synthesis of hierarchical CoxMn3−xO4array micro-/nanostructures with tunable morphology and composition as integrated electrodes for lithium-ion batteries

Abstract

Hierarchical Co_xMn_3−xO₄ array micro-/nanostructures with tunable morphology and composition have been grown on conductive stainless steel with robust adhesion by a facile solvothermal route and a subsequent annealing treatment. By simply controlling the volume ratio of components in the mixed solvent, the morphology of the products can be tailored from hierarchical nanowires to nanosheets. Benefitting from the unique structural features, the resultant CoMn₂O₄ nanowires and MnCo₂O₄ nanosheets exhibit excellent electrochemical performance with remarkable specific capacities (540–207 mA h g⁻¹) at various current rates (1–10 C) and good cycling stability for highly reversible lithium storage. The enhanced electrochemical performance suggests their promising use as integrated binder-free electrodes for microscale lithium-ion batteries.