Process for preparing nano nickel oxide electrode for super capacitor

Abstract

The present invention relates to electrode material preparing technology, and is especially process of preparing nanometer nickel oxide electrode for super capacitor. The technological process includes the following steps: 1. compounding water solution A of nickel salt containing polyglycol as the protecting agent and water solution B of sodium hydroxide containing ammonia; 2. adding the solution B into the solution A at 50 deg.C through magnetic stirring for 2 hr to produce precipitant, suction filtering, washing and stoving the precipitant, and calcining at 400-500 deg.C for 4-5 hr to obtain nanometer nickel hydroxide; and 3. mixing the nanometer nickel hydroxide with organic adhesive in the weight ratio of 4-9, mixing in a ball mill, hot pressing at 150 deg.C and 300 MPa for 10-20 min, and final carbonizing at 850 deg.C to obtain nanometer nickel oxide electrode.

Description

technical field [0001] The invention relates to a preparation method of a nano-nickel oxide electrode used for a supercapacitor, and belongs to the technical field of chemical electrode material manufacturing technology. Background technique [0002] Supercapacitors are unique capacitors that are 20 to 2000 times larger than conventional capacitors. It has excellent pulse discharge performance and large-capacity energy storage performance that traditional capacitors do not have, and its application in high-energy pulse lasers has attracted widespread attention. At the same time, because of its unique advantages such as large energy storage, high power, light weight, and long cycle life, it is used as a backup power source, such as temporary lighting, heating, electric water pumping, and backup power for computers. Recently, during the practical application of electric vehicles, it was discovered that the vehicle urgently needs to supply high-current pulse electric energy wh...

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Problems solved by technology

[0003] Chinese patent CN02156897.9 relates to a method for preparing nano-nickel oxide. The raw materials of this method are easy to obtain, but the method uses alumina as a template, which greatly increases the process difficulty of preparing nickel oxide, and the method has a large viscosity distribution and is easy to obtain. Forms clusters, which is not conducive to contact with the electrolyte

In U.S. Patent No. 7,066,976, it is reported that the electrocatalytic method is used to prepare nano-nickel oxide, and its particle size is 20 to 40 nanometers. However, the preparation of nickel oxide by this method produces a large amount of waste liquid that cannot be treated, and harmful substances are easily produced. High, thus increasing the production cost of nickel oxide

Chinese patents CN200310107714.4 and CN200420092280.5 report that electrodes are prepared by coating. This electrode has burrs and the surface is not smooth, which seriously affects the effective use of the electrode, and the electrode is prone to swelling during use, and even The phenomenon of shedding seriously affects the service life of the electrode