Preparation method of supercapacitor electrode material and electrode material prepared by the method

Abstract

The invention relates to a preparation method of an electrode material for a supercapacitor and the electrode material prepared by the method, which comprises the following steps: (a) drying the crop straw at 100-150°C to remove moisture, and then placing it under airtight conditions to raise the temperature Calcining at 200-350°C for 0.5-5 hours to obtain a pre-carbonized product; (b) taking the pre-carbonized product and adding it to a mixed solution of ferric chloride and sodium chloride, soaking it for 10-20 hours, and drying it at 80-150°C , then placed in an inert gas atmosphere and calcined at 700-1500°C for 1-5 hours, and naturally cooled to obtain a carbonized product. The concentration of the ferric chloride is 5-10g / 100ml, and the concentration of the sodium chloride is 10-20g / 100 m; (c) Wash the carbonized product several times with dilute hydrochloric acid with a concentration of 0.5-2 mol / L, filter the filter residue, rinse the filter residue several times with deionized water, and dry it. Fe3+ can form a stable complex with the oxygen-containing functional groups on the surface of the pre-carbonized product, avoiding the formation of a large number of lattice defects in the calcined carbon material, and is conducive to the construction of a 3D microporous structure.

Description

Technical field [0001] The invention belongs to the field of inorganic materials, and relates to a preparation method of electrode materials, in particular to a preparation method of supercapacitor electrode materials and electrode materials prepared by the method. Background technique [0002] Super capacitor (electric double layer capacitor) is a kind of high energy electric energy storage element developed in recent years. It has the advantages of high power density, high cycle life, fast charge and discharge and no pollution to the environment. It is widely used in motor regulators. Clean energy systems such as sensors, back-up power sources for microcomputer memory, start-up devices for motor vehicles, wind power generation and solar power generation systems have attracted attention. [0003] As an energy storage device with excellent performance, supercapacitors have become one of the research hotspots in the interdisciplinary fields of materials, electricity, electronics, ph...

AI Technical Summary

Problems solved by technology

However, the cost of existing carbon materials is relatively high, and the preparation process is usually complicated, requiring the use of methods such as chemical deposition, electrochemical deposition, etc.