Preparation method of electrode slice with high electrochemical performance

Abstract

The present invention discloses a preparation method of an electrode slice with a high electrochemical performance. The method comprises the steps of: performing preoxidation of banana skin in a condition of a temperature with 200-300 DEG C, cooling the banana skin to a room temperature to mix the banana skin with activating agent according to a 1:1-4 of a quantity relative ratio, adding water tothe mixed banana skin for immersion of the mixed banana skin for 24 hours, and performing drying; performing carbonization of the mixed banana skin in an inert atmosphere for 2-4h with a carbonizationtemperature of 600-900 DEG C, cooling the banana skin after carbonization to the room temperature and then performing acid pickling, performing water washing of the banana skin to be neutral, performing drying, and obtaining banana skin-based activated carbon; and performing mixing by a mass ratio of 21:2:2 of the activated carbon: conductive carbon black: polytetrafluoroethylene emulsion, and preparing a banana skin-based activated carbon electrode slice. The prepared electrode materials are a high specific surface area, the hole structures are various, the connection of the hole channels and carbon skeletons are tidy and ordered in size to facilitate infiltration of the electrolyte solution so as to facilitate transportation and diffusion of electrolyte ions and allow the electrode materials to have a good electrochemical performance and large specific capacitance.

Description

technical field [0001] The invention relates to the technical field of preparation of activated carbon electrode sheets, in particular to a method for preparing an electrode sheet with high electrochemical performance. Background technique [0002] Electrochemical capacitor is the principle that ions in the electrolyte solution generate an electric double layer between the solid conductive motor and the electrolyte solution interface through electrostatic attraction, or a capacitor made by the principle of storing charge through the surface Faraday redox reaction. It is a dielectric A new type of energy storage device between capacitors and batteries, it has extremely high safety, energy conversion efficiency and long cycle life, and is an ideal device to replace batteries. [0003] Due to the rich pore structure and high porosity of porous carbon materials, porous carbon materials represented by activated carbon have become the first choice for the preparation of electroche...

AI Technical Summary

Problems solved by technology

However, when using the existing technology to prepare porous carbon materials for electrochemical capacitors, non-renewable resources such as pitch, petroleum tar, and coal are mostly used as the main raw materials, and the preparation cost is high. Poor, the pore structure is not easy to control, and the specific surface area is still small (about 1000m 2 / g) and poor conductivity, the prepared electrochemical capacitor has low energy density, small specific capacity, poor electrochemical performance, and causes a certain degree of environmental pollution.

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