Graphene oxide slurry, miniature graphene electrode and preparation method thereof and miniature graphene supercapacitor

Abstract

The invention discloses graphene oxide slurry, a miniature graphene electrode and a preparation method thereof and a miniature graphene supercapacitor. The graphene oxide slurry comprises the following components in parts by weight: 15-35 parts of graphene oxide, 1-3 parts of bonding resin and 150-200 parts of a solvent. The miniature graphene electrode is prepared from the graphene oxide slurry through the steps of printing and reduction. The miniature graphene supercapacitor comprises the miniature graphene electrode and an electrolyte, wherein the electrolyte covers a positive electrode and a negative electrode of the miniature graphene electrode. The preparation route from the graphene oxide electrode to the graphene electrode and then to the miniature graphene supercapacitor is simple and low in cost. The prepared miniature graphene supercapacitor with a two-dimensional planar structure is good in capacitance performance and convenient for being integrated into a chip electronic product.

Description

technical field [0001] The invention belongs to the technical field of micro-energy storage, and in particular relates to a graphene oxide slurry, a micro-graphene electrode and a preparation method thereof, and a micro-supercapacitor. Background technique [0002] The rapid development of integrated electronic products has increased the demand for miniaturization and chip energy storage units, and the electronics industry is developing towards miniature, portable, flexible and highly integrated electronic products. Thin-film batteries or micro-batteries have been used in commercial miniaturized devices, but they have a short service life, complex structures, and are difficult to integrate. Supercapacitors can overcome these shortcomings. Supercapacitors (also known as electric double layer capacitors) are a new type of energy storage element that combines the high energy density of traditional batteries and the high power characteristics of electrolytic capacitors. It has g...

AI Technical Summary

Problems solved by technology

[0004] At present, although the preparation of micro-graphene electrodes has been reported in the literature, its research and development are still in a relatively early stage, and the preparation methods are relatively complicated and costly.

For example, a conductive graphene carbon paste ink and its preparation method disclosed in Chinese invention patent 201410057131.3, a conductive ink based on graphene composite material and its preparation method disclosed in Chinese invention patent 201510090294.6, these disclosed graphene conductive inks, all Graphene slurry with high cost is used, and graphene is easy to agglomerate and has poor uniformity. Therefore, most of the current research on graphene supercapacitors is to use graphene as an electrode material in a three-electrode system. Most of the printing methods prepare traditional planar curled graphene supercapacitors (i.e., stacked configuration), however, recent studies have found that this stacked configuration is not conducive to the transport of electrolyte ions, and this structure has a large volume , difficult to be compatible with microelectronics

Images