A method for preparing carbon materials for supercapacitors by alkali-activated nitrogen-containing heterocyclic metal complexes and its application

Abstract

The invention discloses a method for preparing a supercapacitor carbon material from an alkali-activated nitrogen-containing heterocyclic metal complex. The method comprises the following steps: (1) dissolving a nitrogen-containing heterocyclic organic ligand into an organic solvent, (2) completely dissolving a zinc salt into deionized water, slowly dripping the zinc salt solution into the solution of step (1) and stirring the solution, (3) preparing a mixed solution of absolute ethanol and deionized water, adding an alkali having a molar ratio of (10-100):1 (alkali: zinc salt) to the mixed solution, ultrasonically dissolving the solution, pouring the solution after ultrasonic dissolution into the mixed solution of step (2), continuously stirring and evaporating the solution, and (4) adding the evaporated solid product to a quartz boat, heating the solid product to 700 DEG C at a rate of 5 DEG C per minute in a vacuum tube furnace under the protection of nitrogen, naturally cooling thesolid to room temperature to obtain a black product, washing the obtained black product several times with 2 mol / L hydrochloric acid solution, deionized water and absolute ethanol, and drying the black product at a constant temperature of 80 DEG C for ten hours. The method has the advantages of high yield, good repeatability, stable reaction and the like.

Description

technical field [0001] The invention belongs to the technical field of supercapacitor electrode materials, in particular to a method for preparing supercapacitor carbon materials by alkali-activating nitrogen-containing heterocyclic metal complexes and an application thereof. Background technique [0002] Supercapacitors, also known as electrochemical supercapacitors or overcapacitors, have high power density, large specific capacitance, fast charge and discharge, long cycle life (up to 100,000cycle), simple equipment, and high current discharge And low self-discharge and other advantages, its application in the industry is more and more extensive; for example, for the use of portable equipment, many handheld and portable products, such as electric toys, portable cameras, cameras, digital watches, and even mobile phones, Computers are already using supercapacitors above 5F. [0003] The current supercapacitor is an energy storage device between the battery and the tradition...

AI Technical Summary

Problems solved by technology

However, although these activation methods can make some improvements to carbon materials, such as increasing their specific surface area, due to the behavior of reducing the quality of carbon materials such as etching during the activation process, we often get porous materials with relatively low yields. carbon material

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