Construction of Complex Co3O4@Co3V2O8 Hollow Structures from Metal–Organic Frameworks with Enhanced Lithium Storage Properties

Abstract

A novel metal–organic-framework-engaged strategy is demonstrated for the preparation of multishelled Co₃O₄@Co₃V₂O₈ hybrid nanoboxes. This strategy relies on the unique reaction of zeolitic imidazolate framework-67 with the vanadium source of vanadium oxytriisopropoxide. Benefitting from the synthetic versatility, a series of nanostructures can be realized including triple-shelled and double-shelled Co₃O₄@Co₃V₂O₈ nanoboxes and single-shelled Co₃V₂O₈ nanoboxes. When evaluated as electrode materials for lithium-ion batteries, these unique hollow structures demonstrate remarkable lithium storage properties. For example, the triple-shelled Co₃O₄@Co₃V₂O₈ nanoboxes retain a high capacity of 948 mAh g⁻¹ after 100 cycles at 100 mA g⁻¹.

Multishelled Co₃O₄@Co₃V₂O₈ hybrid nanoboxes are successfully synthesized via a simple metal–organic-framework-engaged strategy utilizing the reaction of zeolitic imidazolate framework-67 (ZIF-67) with the vanadium source of vanadium oxytriisopropoxide. When evaluated as electrode materials for lithium-ion batteries, these unique nanoboxes exhibit enhanced lithium storage properties.

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