Method for preparing multilevel pore carbon electrode material of super capacitor

Abstract

The invention provides a method for preparing a multilevel pore carbon electrode material of a super capacitor, comprising the following steps: (1) preparing the mixing solution of ethyl alcohol and water, adding a surfactant and a phenol compound into the mixture, stirring until the mixture is dissolved, adding concentrated hydrochloric acid into the solution, stirring until the solution is pink, then adding methanal, stirring to generate solid phenolic resin at the bottom of the solution, aging the phenolic resin in the solution, taking out, and then aging at 100 DEG C; (2) carbonizing aged phenolic resin under the protection of nitrogen at 850 DEG C to obtain a mesoporous carbon material; (3) smashing the mesoporous carbon material to less than 50 meshes, and then activating by an activating agent under the protection of nitrogen; and (4) washing the activated product by deionized water and drying to obtain the microporous-mesoporus multilevel pore carbon electrode material. In the invention, mesoporus carbon with even pore size distribution is prepared firstly, and then micropores are produced on the pore wall of the mesoporus carbon in the activation process to obtain the multilevel pore carbon electrode material with directly communicated mircropores and mesopores.

Description

technical field

[0001] The invention relates to a preparation method of a supercapacitor electrode material, in particular to a preparation method of a hierarchical porous carbon electrode material. Background technique

[0002] Supercapacitor is another new type of energy storage device with great potential for wide application after lithium-ion batteries. It not only has the high specific power and high cycle characteristics of conventional capacitors, but also has the characteristics of high energy storage of batteries. Therefore, it can meet the needs of both high specific power and high specific energy. Compared with the secondary battery, it has the characteristics of small leakage current, simple charge and discharge, high specific power and long cycle life, so it can form a composite power system with the secondary battery to meet the needs of the car when starting, accelerating, and climbing. high power requirements. The energy storage mechanism of supercapacitors...