Method for manufacturing low-cost three-dimensional-structure graphene-aluminum supercapacitor composite electrode material

Abstract

The invention discloses a method for manufacturing a low-cost three-dimensional-structure graphene-aluminum supercapacitor composite electrode material, and relates to a method for manufacturing a composite electrode material. The method solves the problems that due to the facts that most of graphene materials adopted by an existing graphene-based supercapacitor are graphene obtained through an oxidation method, the structural defects are many, many surface oxygen-containing functional groups exist, and the performance of the graphene-based supercapacitor is greatly worsened, in the use process of the supercapacitor, wettability between the supercapacitor and an electrolyte is poor, the effective reaction area is reduced, and the high specific surface area and the excellent electrical properties of the graphene materials are difficultly brought into play. The method comprises the steps that base materials are placed in a plasma enhanced chemical gas phase deposition vacuum device, argon enters the device, the temperature and the pressure are adjusted, the methane gas enters the device for deposition, and after deposition is finished, the three-dimensional-structure graphene-aluminum supercapacitor composite electrode material is obtained. The method is used for manufacturing the graphene-aluminum supercapacitor composite electrode material.

Description

technical field [0001] The invention relates to a preparation method of a composite electrode material. Background technique [0002] Supercapacitor is a new type of energy storage device, which has excellent characteristics such as high power density, long cycle life, fast charge and discharge rate, safety and environmental protection. Therefore, supercapacitors have broad application prospects in electric vehicles, power electronics industry, consumer electronics and other fields. However, traditional supercapacitors have problems such as low energy density and unstable performance, which have always plagued their practical applications in fields such as electric vehicles. Due to its unique two-dimensional nanostructure, graphene material has extremely high specific surface area, excellent electrical, mechanical and thermal properties, and has broad application prospects in many fields such as micro-nano electronics and composite materials. [0003] However, the current ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that most of the graphene materials used in existing graphene-based supercapacitors are graphene prepared by oxidation method, which has many structural defects and many oxygen-containing functional groups on the surface, which greatly deteriorates the performance of graphene-based supercapacitors, and due to The characteristics of graphene materials such as low density, easy agglomeration and stacking make supercapacitors have poor wettability with electrolyte during use, and the effective reaction area is low, making it difficult to exert the high specific surface area and excellent electrical properties of graphene materials. Preparation method of a low-cost three-dimensional structure graphene-aluminum supercapacitor composite electrode material

Images