Nanometer nickel cobaltite and preparation method thereof

A technology of nano-cobalt and nickel acid, which is applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of uneven distribution of nickel cobaltate particles, cumbersome and complicated production methods, and poor dispersion. Large-scale production, simple preparation method, and the effect of increasing the reaction rate

Active Publication Date: 2016-03-30
安徽富锂新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Nanometer nickel cobaltite and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method step of nano-nickel cobaltate of the present invention is as follows:

[0020] (1) 11.6gNi(NO 3 ) 2 ·6H 2 O (contains nickel ion 0.04mol), 23.3gCo(NO 3 ) 2 ·6H 2 Add O (containing 0.08 mol of cobalt ions) and 24.0 g of urea into 100 ml of absolute ethanol, stir at room temperature, and mix the solution evenly to obtain solution A;

[0021] (2) Add 20ml of sorbitan fatty acid ester S-20 and 30ml of sorbitan fatty acid ester S-40 into solution A, and ultrasonically mix them uniformly to obtain solution B;

[0022] (3) Transfer the solution B to the reaction kettle, and react at a constant temperature of 110°C for 22 hours, with a stirring speed of 90r / min. The stirring process is to use non-magnetic stirring; wash 3 times with deionized water and absolute ethanol respectively, Drying at a constant temperature at 62°C to obtain a precursor;

[0023] (4) After the precursor was heat-treated at a constant temperature of 370°C for 2h in air...

Embodiment 2

[0026] The preparation method step of nano nickel cobaltate of the present invention is as follows:

[0027] (1) 11.6gNi(NO 3 ) 2 ·6H 2 O (contains nickel ion 0.04mol), 23.3gCo(NO 3 ) 2 ·6H 2 O (containing 0.08 mol of cobalt ions) and 36.0 g of urea were added to 100 m of absolute ethanol, stirred at room temperature, and the solution was mixed evenly to obtain solution A;

[0028] (2) Add 20ml of sorbitan fatty acid ester S-20 and 30ml of sorbitan fatty acid ester S-40 into solution A, and ultrasonically mix them uniformly to obtain solution B;

[0029] (3) Transfer the solution B to the reaction kettle, and react at a constant temperature of 100°C for 24 hours, the stirring speed is 80r / min, and the stirring process is to use non-magnetic stirring; wash 3 times with deionized water and absolute ethanol respectively, Dry at a constant temperature of 60°C to obtain a precursor;

[0030] (4) After the precursor was subjected to constant temperature heat treatment at 360°...

Embodiment 3

[0033] The preparation method step of nano nickel cobaltate of the present invention is as follows:

[0034] (1) 11.6gNi(NO 3 ) 2 ·6H 2 O (contains nickel ion 0.04mol), 23.3gCo(NO 3 ) 2 ·6H 2 O (containing 0.08 mol of cobalt ions) and 31.0 g of urea were added to 100 ml of absolute ethanol, stirred at room temperature, and the solution was mixed evenly to obtain solution A;

[0035] (2) Add 20ml of sorbitan fatty acid ester S-20 and 30ml of sorbitan fatty acid ester S-40 into solution A, and ultrasonically mix them uniformly to obtain solution B;

[0036] (3) Transfer the solution B to the reaction kettle, and react at a constant temperature of 130°C for 25 hours, with a stirring speed of 100r / min. The stirring process is to use non-magnetic stirring; wash with deionized water and absolute ethanol three times respectively, Dry at a constant temperature of 65°C to obtain a precursor;

[0037] (4) After the precursor was heat-treated at a constant temperature of 350° C. f...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00H01G11/46B82Y30/00
CPCY02E60/13C01G53/00B82Y30/00C01P2002/72C01P2004/64H01G11/46
Inventor 林展刘培杨高学会李高然许阳阳李全国
Owner 安徽富锂新能源科技有限公司
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