A kind of preparation method and application of compressible graphene airgel and supercapacitor

Abstract

The invention provides a preparation method and application of a compressible graphene airgel and a super capacitor thereof. Using pyrrole (Py), silver nitrate as redox agent, and graphite oxide to prepare RGO-PPy-Ag hydrogel by one-step hydrothermal method, and freeze-drying to obtain RGO-PPy-Ag airgel. A series of testing methods such as infrared spectroscopy, XPS, Raman, and XRD have been used to confirm the successful reduction of GO. A large number of oxygen-containing functional groups on the GO sheet structure have been removed and Py and AgNO 3 Redox to PPy‑Ag immobilized on the three-dimensional framework of graphene. When Strain=40%, the composite airgel can withstand more than 20 times of compression, and its recovery rate can reach more than 75%. And assemble a compressible graphene supercapacitor to explore its electrochemical performance. After 20 times of compression, its electrochemical performance has not changed significantly and has a certain stability.

Description

technical field [0001] The invention belongs to the field of electrochemical energy, in particular to a preparation method and application of a compressible graphene airgel and a super capacitor thereof. Background technique [0002] In recent years, deformable electronic devices have received great attention because they can be flexibly applied to non-traditional forms of high-tech electronics while maintaining their properties, playing an important role in the field of high-tech electronics. Stretchable electronics, an integral part of advanced electronics, have been able to accommodate high-frequency strain without significant loss of functionality. Among various power devices, supercapacitors stand out due to their high power density, long cycle life, and short charging time of energy storage devices, which have attracted extensive interest from researchers. These advantages it has make it very promising to be used in electric vehicles and other high-power energy source...

AI Technical Summary

Problems solved by technology

However, the original three-dimensional graphene mechanism has relatively poor compressive and elastic properties, and it is easy to produce irreversible deformation or even cause the structure to collapse during the compression process.

Therefore, even though graphene has been widely used in the manufacture of supercapacitors and electrodes, there are basically no reports on the preparation of graphene compressible supercapacitors.

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