Fabrication method of polarized electrode material for electrochemical capacitor

Abstract

The invention discloses a fabrication method of a polarized electrode material for an electrochemical capacitor. The method comprises the following steps of (A) material selection, (B) doping and compounding, (C) high-temperature treatment, (D) physical modification, (E) activating treatment, and (F) filtering and drying, wherein 5%-25% metal oxide is added to needle coke in unit part by an orthogonal experimental design method in Step (A); ultrafine particle doping and compounding are conducted on the material selected in Step (A) with a high-temperature fluidized bed reactor in Step (B); a material obtained in Step (B) is calcined to be porous with a high-temperature electric resistance furnace under a deoxygenization condition and at 600 DEG C in Step (C); in Step (D), an ultrasonic method is adopted to treat a material obtained in Step (C); a material obtained in Step (D) reacts with nitric acid in Step (E); and reaction liquid obtained in Step (E) is filtered to be neutral with distilled water and dried at 80-90 DEG C in Step (F). The method has the benefits that the production cost is low, the fabrication method is simple, the specific capacitance is increased greatly, the power density is high, and the service life is long.

Description

technical field [0001] The invention relates to a preparation method of a polarized electrode material for an electrochemical capacitor, belonging to the field of electrochemical and new energy materials. Background technique [0002] Electrochemical Supercapacitor (Electrochemical Supercapacitor), also known as supercapacitor, is a new type of energy storage device developed in the 1990s. It has the dual characteristics of conventional physical dielectric capacitors and batteries. Compared with traditional capacitors, its specific energy and specific capacitance can be increased by more than 1000 times; compared with traditional batteries, it has fast charging, long cycle life, strong environmental adaptability, no memory effect, maintenance-free, and no pollution to the environment, etc. advantage. Supercapacitors have broad application prospects in environmental protection power, mobile communications, daily consumer electronics, electric vehicles, aerospace and other fi...

AI Technical Summary

Problems solved by technology

However, the energy density of supercapacitors made of these carbon materials as polarized electrodes is low, and the specific capacitance decays rapidly under high-rate charge-discharge conditions. It is difficult to meet the high specific energy, high power density and long life of modern equipment for supercapacitors. Cyclic use requirements