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Solvent thermal preparation method of NiCo2O4 nano-material

A technology of nanomaterials and nickel cobaltate, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of uneven distribution of nickel cobaltate particles, poor dispersion, low output, etc., and achieve a suitable large-scale The production and preparation methods are simple and the product cost is low

Active Publication Date: 2016-03-16
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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  • Solvent thermal preparation method of NiCo2O4 nano-material

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Effect test

Embodiment 1

[0025] Solvothermal method of the present invention prepares the method step of nickel cobaltate nanometer material as follows:

[0026] (1) Weigh 2.9gNi(NO 3 ) 2 ·6H 2 O (contains 0.01mol of nickel ions), 5.8gCo(NO 3 ) 2 ·6H 2 O (containing cobalt ion 0.02mol) and 0.085gNaNO 3 Disperse in 50mL of polyethylene glycol 400, then add 10g of urea, sonicate until completely dissolved, then transfer the resulting mixed solution to a reaction kettle, heat to 200°C, and react at a constant temperature for 16h under stirring conditions, and the stirring speed is 270r / min, using non-magnetic stirring; after the reaction, the precursor solution was cooled to room temperature, and the obtained product was washed 3 times with deionized water, then washed 3 times with absolute ethanol, and dried at a constant temperature at 80°C. That is, the precursor is obtained.

[0027] (2) The obtained precursor was placed in a tube furnace and heat-treated at a constant temperature of 390° C. ...

Embodiment 2

[0030] Solvothermal method of the present invention prepares the method step of nickel cobaltate nanometer material as follows:

[0031] (1) Weigh 2.9gNi(NO 3 ) 2 ·6H 2 O (contains 0.01mol of nickel ions), 5.8gCo(NO 3 ) 2 ·6H 2 O (containing cobalt ion 0.02mol) and 0.085gNaNO 3 Disperse in 45mL polyethylene glycol 400, then add 12g urea, sonicate until completely dissolved, then transfer the resulting mixed solution to a reaction kettle, heat to 180°C, and react at a constant temperature for 20h under stirring conditions, and the stirring speed is 260r / min, using non-magnetic stirring; after the reaction, the precursor solution was cooled to room temperature, and the obtained product was washed 3 times with deionized water, then washed 3 times with absolute ethanol, and dried at a constant temperature at 75°C. That is, the precursor is obtained.

[0032] (2) The obtained precursor was placed in a tube furnace and heat-treated at a constant temperature of 400° C. for 2 ...

Embodiment 3

[0035] Solvothermal method of the present invention prepares the method step of nickel cobaltate nanometer material as follows:

[0036] (1) Weigh 2.9gNi(NO 3 ) 2 ·6H 2 O (contains 0.01mol of nickel ions), 5.8gCo(NO 3 )2 ·6H 2 O (containing cobalt ion 0.02mol) and 0.085gNaNO 3 Disperse in 40mL polyethylene glycol 400, then add 15g urea, sonicate until completely dissolved, then transfer the resulting mixed solution to a reaction kettle, heat to 180°C, and react at a constant temperature for 24h under stirring conditions, and the stirring speed is 280r / min, using non-magnetic stirring; after the reaction, the precursor solution was cooled to room temperature, and the obtained product was washed with deionized water for 3 times, and then washed with absolute ethanol for 3 times, and dried at a constant temperature at 70°C. That is, the precursor is obtained.

[0037] (2) The obtained precursor was placed in a tube furnace and heat-treated at a constant temperature of 410°...

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Abstract

The invention provides a solvent thermal preparation method of a NiCo2O4 nano-material. The method comprises steps as follows: (1) Ni(NO3)2*6H2O, Co(NO3)2*6H2O and NaNO3 are added to polyethylene glycol 400 to be sufficiently dissolved, urea is added to the mixture for full dissolution, and a mixed solution is obtained; (2) the obtained mixed solution react in a reaction kettle at the constant temperature for a certain period of time under the condition of stirring, is washed and is dried, and a precursor is obtained; (3) the precursor is subjected to constant-temperature heat treatment in air, and the NiCo2O4 nano-material is obtained. According to the method, the polyethylene glycol 400 is used as a solvent, Ni(NO3)2*6H2O and Co(NO3)2*6H2O are used as reaction raw materials, the urea is used as a precipitating agent, NaNO3 is used as an aid, after the precursor is prepared with a solvent thermal method, the NiCo2O4 nano-material with the large specific surface area (68 m<2> / g) is prepared, the specific capacity is up to 2015 F / g, the preparation method is simple, the product cost is low, and the method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a solvothermal preparation method of nickel cobaltate nanomaterials. 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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IPC IPC(8): C01G53/00B82Y30/00
CPCY02E60/10
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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