Super capacitor material NiO synthesis method

Abstract

The present invention relates to a super capacitor material NiO synthesis method, belonging to the energy storage electrode material field. In the method, microemulsion dispersion liquid drop is taken as a microreactor, nanometer stabilized alpha-Ni(OH)2 is synthesized by co-doping metal cation, and heat treatment is carried out on the alpha-Ni(OH)2 to obtain doped nanometer NiO material, and wherein the doped metal cation is one or more than one of Al<3+>, Cu<2+>, Y<3+>, Mn<2+>, Zn<2+>, Co<2+>, Cr<3+> and Fe<3+>, the ratio of doped ion and nickelous ion is 0-0.2, and the microemulsion is 'Triton X-100 / normal butanol / cyclohexane / water' four-component system. The material obtained by the method is used in super capacitor, the specific capacity is higher, the conductivity is good, the synthetic route is simple, the condition is easy to control, and the product purity is higher compared with general NiO material, thus being applicable to commercialization production.

Description

technical field [0001] The invention relates to a method for synthesizing NiO, a supercapacitor material, and belongs to the field of energy storage electrode materials. Background technique [0002] 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. with RuO 2 Supercapacitors with noble metal oxides as electrode materials have been used in many fields, but it is difficult to further promote them because of their high price. Other cheap metal oxides that can be used as capacitor materials, such as NiO, Co 3 o 4 、MoO 2 and WO 3 And polymers, etc., have recently become a research hotspot. Although the research on NiO s...

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Problems solved by technology

[0003] The preparation method of NiO is divided into liquid phase method and solid phase method. The solid phase method is not easy to form NiO powder with high purity and uniform particle size, and the material utilization rate is low and the performance is poor.

The liquid phase method generally synthesizes Ni(OH) first 2 Then heat treatment is NiO, and the synthesis methods mainly include sol-gel method, coordination precipitation method, ultrasonic decomposition method, chemical precipitation method, etc., but there are also problems such as complex process, high cost, and difficulty in uniform dispersion of powder.

In addition, the intermediate products in the process of conventional preparation methods are mostly amorphous or β-phase Ni(OH) 2 , limited by its structure, the electrochemical performance of NiO is difficult to further improve

Moreover, the conductivity of NiO is poor, and it is generally improved by adding a conductive agent, resulting in a loss of energy density.

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