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A highly dispersed nanowire-shaped nickel-cobalt oxide and nickel-cobalt sulfide material and its preparation method

A technology of nickel-cobalt oxide and nickel-cobalt sulfide, applied in the direction of nickel oxide/nickel hydroxide, nickel sulfide, nanotechnology, etc., can solve the problems of insufficient output, poor reproducibility, high production cost, etc., and achieve good reproducibility , high yield, and the effect of improving dispersibility

Active Publication Date: 2022-03-11
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This nano-preparation method introduces other substances, such as carbon cloth and nickel mesh, so there are often problems of insufficient yield, poor reproducibility, and high production costs, and this fixed substrate @NiCo 2 o 4 and base @NiCo 2 S 4 Binary materials limit their subsequent diverse dispersion blending with other active substances
Therefore, a method was sought to overcome the NiCo 2 o 4 and NiCo 2 S 4 Insufficient yield, poor reproducibility, and high production costs, and obtained nano-sized NiCo with high dispersion in the solvent for mixing 2 o 4 and NiCo 2 S 4 materials are especially necessary

Method used

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  • A highly dispersed nanowire-shaped nickel-cobalt oxide and nickel-cobalt sulfide material and its preparation method
  • A highly dispersed nanowire-shaped nickel-cobalt oxide and nickel-cobalt sulfide material and its preparation method
  • A highly dispersed nanowire-shaped nickel-cobalt oxide and nickel-cobalt sulfide material and its preparation method

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preparation example Construction

[0032] The invention discloses a method for preparing a highly dispersed nanowire-shaped nickel-cobalt oxide material, wherein the nanowire-shaped nickel-cobalt oxide can be abbreviated as Nanowire-NiCo 2 o 4 , including the following steps,

[0033] Step 1, uniformly disperse carbon spheres, nickel salt, cobalt salt and weak base in deionized water, and let the carbon spheres fully absorb nickel ions and cobalt ions to obtain mixed system A after standing for 5-100 hours;

[0034] Among them, first disperse the carbon spheres in deionized water, stir and disperse evenly, then add nickel salt, cobalt salt and weak base to stir and disperse evenly, to obtain a uniformly dispersed mixed system A, so that the adsorption of carbon spheres can be fully exerted, carbon spheres The average particle size is 200-500nm, the concentration is 0.1-1mol / L, the concentration of nickel salt is 0.001-0.05mol / L, the concentration of cobalt salt is 0.002-0.1mol / L, the concentration of weak base...

Embodiment 1

[0044] A Highly Dispersed Nanowire-NiCo 2 o 4 The preparation method of material comprises the following steps,

[0045] Step 1, configure a carbon sphere solution with a concentration of 0.1mol / L, first ultrasonic and cell crushing in an ultrasonic cell pulverizer for 15 minutes, then fully stir and disperse until uniform under ultrasonic, and Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·6H 2 O was added to the carbon sphere solution at a molar ratio of 1:2, stirred and dispersed evenly, then added urea, and left to stand for 24 hours to obtain a uniformly dispersed suspension; the Ni(NO 3 ) 2 ·6H 2 The concentration of O is 0.008mol / L, Co(NO 3 ) 2 ·6H 2 The concentration of O is 0.016mol / L, and the concentration of urea is 0.13mol / L;

[0046] Step 2, transfer the suspension to a 100ml reaction kettle, react at 180°C for 10h, cool the suspension to room temperature naturally, wash with deionized water and ethanol for 3 times and suction filter to remove impurities in the ...

Embodiment 2

[0050] A Highly Dispersed Nanowire-NiCo 2 o 4 The preparation method of material comprises the following steps,

[0051] Step 1, prepare a carbon sphere solution with a concentration of 0.5mol / L, first ultrasonically and finely pulverize in an ultrasonic cell pulverizer for 15 minutes, then fully stir and disperse until uniform under ultrasonic, and NiCl 2 ·6H 2 O and CoCl 2 ·6H 2 O is added to the carbon sphere solution at a molar ratio of 1:2, stirred and dispersed evenly, then added ammonia water, and left to stand for 5 hours to obtain a uniformly dispersed suspension; the NiCl in the suspension 2 ·6H 2 The concentration of O is 0.01mol / L, CoCl 2 ·6H 2 The concentration of O is 0.02mol / L, and the concentration of ammonia water is 0.1mol / L;

[0052] Step 2, transfer the suspension to a 100ml reactor, react at 120°C for 15h, cool the suspension to room temperature naturally, wash with deionized water and ethanol for 3 times and suction filter to remove impurities in ...

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Abstract

The present invention is a highly dispersed nanowire-shaped nickel-cobalt oxide and nickel-cobalt sulfide material and a preparation method thereof. The preparation method of the nickel-cobalt oxide includes step 1, uniformly dispersing carbon spheres, nickel salt, cobalt salt and weak base in Stand still in deionized water to obtain a mixed system; step 2, react at 120-200°C for 5-15h, cool to room temperature, remove impurities, and dry the product in vacuum to obtain a precursor of nickel-cobalt oxide; step 3, at 300-400°C Sintering for 1-10 hours to obtain a highly dispersed nanowire-shaped nickel-cobalt oxide material; the preparation method of the nickel-cobalt sulfide includes step 1, adding the nickel-cobalt oxide material to a 0.1-0.5mol / L sodium sulfide solution to obtain a mixed system; Step 2, react at 150-200°C for 1-10h, then cool to room temperature, remove impurities, and vacuum-dry the product to obtain a highly dispersed nanowire-shaped nickel-cobalt sulfide material; these two materials have no substrate and good dispersibility.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a highly dispersed nanowire-shaped nickel-cobalt oxide and nickel-cobalt sulfide material and a preparation method thereof. Background technique [0002] Nickel cobalt oxide (NiCo 2 o 4 ) and nickel cobalt sulfide (ie NiCo 2 S 4 ) is a class of binary metal compounds with excellent electrical conductivity and electrochemical activity, and has very broad application prospects in the fields of supercapacitors and lithium-ion batteries. [0003] Nanoized NiCo 2 o 4 Electrode material and NiCo 2 S 4 The specific surface area of ​​the electrode material is large, and the non-nanometer NiCo 2 o 4 or NiCo 2 S 4 Compared with the exposed electrochemical sites, the electrochemical performance is better. However, the nano-preparation methods of these two types of materials generally use a rigid substrate, such as carbon cloth and nickel mesh, and use the induce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/04C01G53/11H01G11/30H01G11/46H01M4/525H01M4/58H01M10/0525B82Y40/00
CPCC01G53/04C01G53/11H01M4/525H01M4/5815H01M10/0525H01G11/46H01G11/30B82Y40/00C01P2004/16Y02E60/10
Inventor 吴海伟王莉李志健庞小飞毕经煊王雷孟卿君
Owner SHAANXI UNIV OF SCI & TECH
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