A preparation method of graphene-coated NiO@ZnO nano-heterostructure material and corresponding materials

By growing NiO@ZnO nanoheterostructure on a carbon cloth substrate and coated with graphene, the problems of flexibility and cycle stability of traditional electrode materials are solved, and efficient and safe preparation of lithium-ion battery materials are achieved.

CN117894925BActive Publication Date: 2025-03-28BEIFANG UNIV OF NATITIES
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Patent Information

Application Number
CN202410065657.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-17
Publication Date
2025-03-28
Estimated Expiration
2044-01-17

AI Technical Summary

Technical Problem

The lack of flexibility in traditional copper foil-coated electrode materials limits the development of flexible wearable devices, while the volume expansion of transition metal oxide-based materials during charging and discharging, resulting in deterioration of electrochemical kinetics and cyclic stability.

Method used

The preparation method of graphene-coated NiO@ZnO nanoheterostructure materials is used to grow NiO@ZnO nanoheterostructures on carbon cloth substrates through hydrothermal reaction and electrochemical deposition technology, and the surface is coated with graphene, and finally high-temperature annealing is performed to enhance the stability of the material.

Benefits of technology

It significantly extends the cycle life of the electrode material, improves the conductivity and lithium ion adsorption energy, improves the structural stability, high capacity, high magnification and high cycling stability of the battery, and is suitable for the industrial production of flexible lithium ion battery energy storage devices.

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Abstract

The present invention relates to the technical field of energy storage nanomaterials, and to a preparation method of a graphene-coated NiO@ZnO nano heterogeneous structure material and corresponding materials, including: pre-treating a carbon cloth substrate, preparing a heterogeneous structure precursor solution; placing the pre-treated carbon cloth substrate in the heterogeneous structure precursor solution for hydrothermal reaction, washing and vacuum drying the hydrothermal reaction product cooled to room temperature, and obtaining a NiO@ZnO / CC nano heterogeneous structure precursor; preparing a graphene solution using a graphene dispersion, placing the NiO@ZnO / CC nano heterogeneous structure precursor in the prepared graphene solution for electrochemical deposition reaction, washing and drying the product of the electrochemical deposition reaction, and obtaining a graphene-coated NiO@ZnO nano heterogeneous structure precursor; and heat-treating the graphene-coated NiO@ZnO nano heterogeneous structure precursor in an inert gas environment to obtain a graphene-coated NiO@ZnO nano heterogeneous structure material. The present invention can improve the electrochemical performance of the material while reducing the cost, and extend the cycle life of the material.
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