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Nickel-cobalt oxide material and preparation method thereof

A nickel-cobalt oxide and nickel salt technology, which is applied in the field of nickel-cobalt oxide materials and their preparation, can solve the problems of poor rate performance of supercapacitors, and achieves the advantages of high current charge and discharge, high effective contact area and porosity, and good performance. Effect of magnification performance

Active Publication Date: 2014-11-05
CHERY AUTOMOBILE CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Using the above NiCo 2 o 4 The rate performance of the supercapacitor prepared by the material is poor

Method used

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  • Nickel-cobalt oxide material and preparation method thereof
  • Nickel-cobalt oxide material and preparation method thereof
  • Nickel-cobalt oxide material and preparation method thereof

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preparation example Construction

[0041] In a third aspect, an embodiment of the present invention provides a NiCo 2 O 4 Materials preparation method, attached figure 1 A flow diagram was prepared for the method. as attached figure 1 As shown, the method includes:

[0042] Step 101: Dissolve nickel salt, cobalt salt and carbon spheres in an aqueous medium, stir evenly, add a weak base, and react at a predetermined temperature for a predetermined time, so that a layer of NiCo is precipitated on the carbon spheres 2 (OH) 6 , get NiCo 2 (OH) 6 / C precursor.

[0043] Step 102, to the NiCo 2 (OH) 6 / C precursor is calcined to remove the carbon spheres to obtain the NiCo 2 O 4 Material.

[0044] The method provided by the embodiment of the present invention forms NiCo on the carbon sphere by forming 2 (OH) 6 , which is conducive to the formation of NiCo with a layered structure 2 O 4 Nano hollow spheres make it have high effective contact area and porosity. The method provided by the embodiment of t...

Embodiment 1

[0062] Dissolve 3 g of glucose and 0.3 g of cetyl ammonium bromide in 40 ml of distilled water, and stir until the solution is clear. The solution was transferred to an autoclave and kept at 180°C for 7h. After the reaction kettle was naturally cooled to room temperature, the precipitate was taken out, washed several times with distilled water and ethanol, and dried at 60° C. for 12 hours to obtain carbon spheres.

[0063] 1 mmol NiCl 2 , 2mmolCoCl 2 Dissolve in 100 ml of distilled water, add 0.4 g of carbon balls, stir by ultrasonic for 30 min, and then add 10 mmol of ammonia water and ultrasonically stir for 30 min to obtain a suspension. The suspension was transferred to biscuits, sealed and heated to 80°C for 10h. Finally, the suspension was naturally cooled to room temperature, the obtained product was centrifuged, washed several times with distilled water and ethanol, and dried at 60°C to obtain NiCo 2 (OH) 6 / C, as the preparation of monolayer NiCo 2 O 4 NiCo in ...

Embodiment 2

[0066] Dissolve 3 g of glucose and 0.3 g of cetyl ammonium bromide in 40 ml of distilled water, and stir until the solution is clear. The solution was transferred to an autoclave and kept at 180°C for 7h. After the reaction kettle was naturally cooled to room temperature, the precipitate was taken out, washed several times with distilled water and ethanol, and dried at 60° C. for 12 hours to obtain carbon spheres.

[0067] 5mmol Ni(NO 3 ) 2 , 10mmol Co(NO 3 ) 2 Dissolve in 150 ml of distilled water, add 0.6 g of carbon balls, stir with ultrasonic for 30 min, and then add 10 mmol of urea with ultrasonic stirring for 30 min to obtain a suspension. The suspension was transferred to the biscuits, sealed well and heated to 90°C for 8h. Finally, the suspension was naturally cooled to room temperature, the obtained product was centrifuged, washed several times with distilled water and ethanol, and dried at 60 °C to obtain NiCo 2 (OH) 6 / C. The resulting NiCo 2 (OH) 6 / C was...

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Abstract

The invention discloses a nickel-cobalt oxide material and a preparation method thereof. The invention belongs to the field of super-capacitor materials. The nickel-cobalt oxide material is a type of NiCo2O4 hollow nano-spheres comprising at least one layer of NiCo2O4 crystal. A particle size of the NiCo2O4 hollow nano-spheres is 800-1000nm. Because the nickel-cobalt oxide material is hollow nano-spheres, the material has high effective contact area and porosity, such that electrolyte penetration and ionic transmission are facilitated, and large-current discharge is facilitated. A super-capacitor prepared with the nickel-cobalt oxide material provided by the embodiment of the invention has good rate performance.

Description

technical field [0001] The invention relates to the field of supercapacitor materials, in particular to a nickel-cobalt oxide material and a preparation method thereof. Background technique [0002] With the improvement and development of science and technology, more and more energy storage and conversion devices are used in our daily life. Among many energy storage and conversion devices, supercapacitors have higher energy density and higher power density than traditional capacitors. It has attracted much attention due to the advantages of batteries, wide operating temperature range, large specific capacitance, long cycle life, and no pollution. In order to prepare supercapacitors with excellent performance, many researchers have devoted themselves to the research of supercapacitor materials. Nickel cobalt oxide (hereinafter referred to as NiCo) 2 O 4 ) is a spinel-structured composite oxide with excellent electrical conductivity and electrochemical activity, and is ofte...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01G51/04B82Y30/00B82Y40/00
Inventor 梅周盛刘三兵朱广燕
Owner CHERY AUTOMOBILE CO LTD
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