Nanometer nickel cobaltite and preparation method thereof

Abstract

The invention provides a preparation method for nanometer nickel cobaltite. The preparation method comprises the following steps: (1) adding nickel nitrate, cobalt nitrate and urea into anhydrous ethanol, and stirring at ordinary temperature to enable the solution to be uniformly mixed, so as to obtain a solution A; (2) adding sorbitan fatty acid ester S-20 and sorbitan fatty acid ester S-40 into the solution A, and uniformly mixing through ultrasonography to obtain a solution B; (3) transferring the solution B into a reaction kettle, conducting solvent thermal reaction, washing, and drying to obtain a precursor; (4) conducting constant temperature heat treatment on the precursor at 350-375 DEG C in air to obtain nanometer nickel cobaltite. In the charge-discharge test, the current density of nanometer nickel cobaltite is 2A / g, the specific capacity value is 2130 F / g which is a relatively high value, and the specific capacity still keeps 92% or above after the charge-discharge test is carried out for 400 times, so that nanometer nickel cobaltite can be used as an electrode material of a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a nanometer nickel cobaltate and a preparation method thereof. Background technique [0002] Nickel cobalt oxide (NiCo 2 o 4 ) is an AB with spinel phase structure 2 o 4 Type composite oxide, in its crystal structure, nickel ions occupy octahedral positions, and cobalt ions occupy both octahedral and tetrahedral positions. Compared with single nickel oxide and tricobalt tetroxide, nickel cobaltate itself has better conductivity. In addition, nickel cobaltate has the advantages of high electrochemical performance, low production cost, sufficient raw materials and environmental friendliness, which has attracted the general attention of researchers. Volume 1868) has been reported. At present, the methods for preparing nickel cobaltate have been reported in the literature: high-temperature solid-phase method, sol-gel method, mechanochemical synthesis met...

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Problems solved by technology

At present, the methods for preparing nickel cobaltate have been reported in the literature: high-temperature solid-phase method, sol-gel method, mechanochemical synthesis method, liquid phase chemical precipitation method, etc., but the nickel cobaltate particles prepared by such methods are unevenly distributed , the dispersibility is not good, the output is low, and the production method is more cumbersome and complicated

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