Method for preparing nickel hydroxide electrode material of supercapacitor

Abstract

The invention discloses a method for preparing a nickel hydroxide electrode material of a supercapacitor, and belongs to the technical field of supercapacitors. The method is characterized in that: by controlling a speed of separating out a precipitator, namely controlling the thickness of quartz sand in an isolation and dilution area and the heating temperature of a main reaction chamber, a reaction speed is controlled. The method comprises the following steps of: heating the main reaction chamber to generate vapor, and making the vapor enter the isolation and dilution area through a condensation reflux system to obtain a diluted precipitator solution; and slowly dripping the diluted solution into the main reaction chamber to make a nickel hydroxide precipitate slowly separated out. The method has the advantages that: a dispersing agent is not required, the preparation method is simple, raw materials are low in prices and easy to obtain, the preparation method is easy to implement, and the prepared nickel hydroxide has a scaly appearance, single crystal form and high specific surface area, and has the characteristics of high specific capacitance and long cycle life through an electrochemical test.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and relates to a method for preparing a nickel hydroxide electrode material for supercapacitors, in particular to a dilution method preparation technology. Background technique [0002] Electrode material is one of the two key factors (electrode material and electrolyte) that determine the performance of supercapacitors. Supercapacitor (electrochemical capacitor) is a new type of energy storage element between electrostatic capacitors and batteries. Compared with traditional capacitors, it has a higher specific capacitance, and the specific capacitance that can be stored is 10 times that of electrostatic capacitors. Above; Compared with the battery, it has higher specific power, and the application prospect is very broad. Nickel hydroxide has recently become a research hotspot due to its cheapness, environmental friendliness, and large theoretical capacity. [0003] At present, most of ...

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Problems solved by technology

[0003] At present, most of the preparation methods of nickel hydroxide are complicated in process, the waste liquid is difficult to deal with, and causes great environmental pollution.

Such as U.S. Patent No. 7,066,976 adopts the electrocatalytic method to prepare nickel hydroxide, and its disadvantage is that a large amount of waste liquid and harmful substances are produced, and the production cost is high.

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