Three-dimensional connected curved graphene and preparation method thereof as well as electrode, capacitor and lithium battery

Abstract

The invention relates to a three-dimensional connected curved graphene and preparation method thereof as well as an electrode, a capacitor and a lithium battery. The three-dimensional connected curved graphene is prepared by firstly forming a polystyrene micro-nanosphere array on a conducting substrate through a self-assembling stacking method, and then depositing metal through an electrochemical deposition method to remove the polystyrene micro-nanosphere, and preparing the graphene on the surface of the three-dimensional connected metal micro-nanosphere cavity structure through the graphene chemical vapor deposition method from the conducting substrate, or self-assembling on the substrate through the self-assembling stacking method to form stacked micro nano-particles array for covering metal element or metal oin, and then preparing the graphene on the surface of the micro nano-particles through the graphene chemical vapor deposition method. The prepared three-dimensional connected curved graphene can be used for manufacturing the electrode for the capacitor and the lithium battery. The three-dimensional connected curved graphene is good in flexibility, excellent in conducting performance, large in specific capacity, and capable of protecting the electrode material and preventing electrode material from peeling off.

Description

technical field [0001] The invention relates to the field of preparation and application of novel graphene materials, specifically a three-dimensional connected curved graphene and a preparation method thereof, as well as electrodes, capacitors and lithium batteries based on three-dimensional connected curved graphene. Background technique [0002] Graphene has a two-dimensional honeycomb crystal structure composed of a single layer of carbon atoms tightly packed, and has excellent electrical, mechanical, thermal and optical properties. These excellent physical properties make graphene in radio frequency transistors, ultra-sensitive sensors, flexible Transparent conductive films, super-strong and high-conductivity composite materials, high-performance lithium-ion batteries and supercapacitors have great application potential. Sheet-like graphene uses hexagonal molecules formed by 6 carbon atoms as the basic unit, and uses the "cross-coupling" method to combine different mole...

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention are: the electrode materials in the prior art are difficult to meet the actual use requirements of the continuously developing micro energy system; the supercapacitor has a large volume and low performance; the existing pure graphene material is difficult to replace the current commercial Lithium-ion battery electrode materials

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