Method for preparing graphene substrate electrode and battery and super capacitor

Abstract

The invention discloses a method for preparing a graphene substrate electrode and a battery and a super capacitor. The method comprises the steps as follows: (a) a first graphene thin film is formed on a first substrate; (b) a second graphene thin film is formed on a second substrate; (c) an anti-corrosion compound is applied to the second graphene thin film, and the second graphene thin film is covered to form an anti-corrosion coating; (d) the anti-corrosion coating is dried; (e) the second substrate is removed; (f) the second graphene thin film is arranged on the first graphene thin film and contacts the first graphene thin film to form a graphene thin film superposition layer; (g) the anti-corrosion coating is removed from the graphene thin film superposition layer; (h) the steps (b) to (g) are repeated, and the graphene thin film is further superposed on the superposition layer until the required thickness of the graphene thin film superposition layer is obtained; and (i) the first substrate is removed from the bottom of the graphene thin film superposition layer to form the electrode.

Description

technical field [0001] The present invention relates to a self-contained flexible energy storage device, such as a battery, a supercapacitor, etc., in particular to a method for manufacturing the electrode material of the device and the electronic material, and in particular to a battery and a supercapacitor Capacitors, said batteries and supercapacitors comprise a paper-like carbon electrode material composed of a carbon thin film material graphene. Background technique [0002] In order to increase profits and facilitate market penetration of multifunctional smart electronics with improved functionality such as rollable displays, e-textiles, wearables, printed circuit boards, and other electronics that can be bent, it is imperative to develop a A flexible energy storage system with improved foldability and integrability. In recent years, great achievements have been made in replacing the rigid metal substrates and packaging of conventional batteries and supercapacitors wi...

AI Technical Summary

Problems solved by technology

[0005] However, the discontinuous graphene sheets obtained by reducing graphene oxide precursors or exfoliating graphite sheets by the above-mentioned method not only have poor mechanical strength and low electrical conductivity, but also have strong tendencies, namely anisotropy, quality, and morphology. It is difficult to control and other disadvantages; these characteristics in turn affect the charge storage and utilization rate; further, the chemical reduction reaction cannot completely reduce graphene oxide, and the process will produce graphite oxide that will reduce the conductivity and reduce the service life of the electrode material Moreover, the production of paper-like supercapacitors and or battery electrodes by the "drip and dry" method necessitates the use of superabsorbent film materials such as cotton sheets, which are prone to aging and oxidation and are therefore prohibited in Practical use in electrochemical systems

Therefore, these device designs cannot fully meet the safety requirements and cannot be applied in actual production. Therefore, based on the above reasons, it is necessary to develop a safe alternative technology to prepare graphene electrodes used in flexible energy storage systems.

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