Capacitor pole piece and manufacturing process thereof

Abstract

The invention discloses a capacitor pole piece, relates to the technical field of super capacitors, and particularly belongs to a voltage-withstanding capacitor pole piece with high energy density anda manufacturing process thereof. The conductive base material, the active substance layer and the insulating layer are laminated and coated to form a capacitor pole piece with a sandwich structure, and the conductive base material is a corrosive aluminum foil and serves as a matrix for bearing an active substance; the active substance layer is formed by mixing active carbon, conductive carbon black, an adhesive, a thickening agent and deionized water; and the graphene insulating layer is formed by mixing white graphene, PI glue (polyimide glue), an adhesive and an N-methyl pyrrolidone solvent. The surface of the capacitor pole piece dressing is coated with an insulating layer formed by mixing white graphene, PI glue (polyimide glue), an adhesive and the like. Cellulose diaphragm paper canbe replaced or thinner diaphragm paper can be adopted under the same withstand voltage, and more active substances can be placed under shells with the same size, so that the positive effect of improving the voltage and the energy density of the super capacitor is achieved.

Description

technical field [0001] The invention relates to the technical field of supercapacitors, in particular to a capacitor pole piece with high withstand voltage and high energy density and a manufacturing process thereof. Background technique [0002] The development of battery technology has always been the main factor restricting the development of the entire electric vehicle industry. When high power output is required for vehicle starting, acceleration, climbing, etc., all kinds of existing traditional batteries cannot meet the requirements, and high power output will seriously damage traditional batteries. High-power supercapacitors can be used in both electric vehicles and hybrid vehicles. A supercapacitor can be used as an auxiliary power source with high power, which can discharge energy in a short time, and can recover the energy obtained during braking. [0003] Supercapacitor is a new type of energy storage component, which has long life, high energy density, and can...

AI Technical Summary

Problems solved by technology

[0004] Although supercapacitors have certain advantages in replacing traditional batteries as power sources for electric vehicles, hybrid electric vehicles, power equipment, military high-power equipment, and rail transit, the voltage of supercapacitors in the current market is generally low and the energy density is low. Relatively low, which restricts its application in these fields, how to improve the voltage and capacity density of supercapacitors has become the current development trend of supercapacitors

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