Abstract
Hierarchical NiCo2O4 micro-/nanostructures constructed with mesoporous nanowire or nanosheet building blocks have been controllably fabricated via a facile two-step strategy involving a solvothermal route and a post-annealing treatment. The tunable morphologies can be easily achieved through simply altering the properties of the reaction solvents. The well-defined hierarchical NiCo2O4 micro-/nanostructures apparently possess intriguing structural advantages, such as fast electron and ion transport, high electroactive surface area, and excellent mechanical stability. As a result, the two hierarchical NiCo2O4 micro-/nanostructures demonstrate large specific capacitance coupled with excellent cycling stability when evaluated as striking electrode materials for high-performance electrochemical capacitors.
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