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A flower-like phosphide nickel cobaltate material, preparation method and application

A phosphide cobalt acid, flower-like technology, applied in chemical instruments and methods, cobalt compounds, nickel compounds, etc., can solve the problems of poor stability of supercapacitors, limited fast electron transfer rates, and large changes in electrode volume expansion. Achieve the effect of enhancing pseudocapacitive capacity, improving volume expansion, and improving energy density and power density

Active Publication Date: 2022-04-12
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their rate capability limits fast electron transport rates due to insufficient electrical conductivity
In addition, the nickel cobalt oxide material in actual production is very prone to irregular agglomeration at the interface, so that the volume expansion of the electrode changes too much during the charging and discharging process, and the material powders or even falls off, making the The stability of supercapacitors deteriorates during charging and discharging, and the conductivity decreases after multiple cycles of charging and discharging.

Method used

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  • A flower-like phosphide nickel cobaltate material, preparation method and application
  • A flower-like phosphide nickel cobaltate material, preparation method and application
  • A flower-like phosphide nickel cobaltate material, preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0038] A preparation method of a flower-like phosphide nickel cobaltate material, comprising the following steps:

[0039] Step 1, prepare carbon nanosphere material:

[0040] (1.1) Weigh 20 g of glucose and dissolve it in 100 ml of deionized water, and stir for 10 h to obtain a glucose solution.

[0041] (1.2) Move the glucose solution obtained in step (1.1) to a polytetrafluoroethylene-lined hydrothermal reaction kettle for hydrothermal reaction at a temperature of 170° C. and a reaction time of 3 hours.

[0042] (1.3) The product after the hydrothermal reaction is subjected to solid-liquid separation using a centrifuge, and the resulting solid product is washed multiple times with deionized water and absolute ethanol, and the resulting solid product is placed in a drying box for drying to obtain carbon nanosphere material.

[0043] Step 2, preparation of flower-shaped nickel cobaltate material:

[0044] (2.1) At room temperature, 0.1g of carbon nanospheres, 1.16g of coba...

Embodiment 2

[0056] Step 1, prepare carbon nanosphere material:

[0057] (1.1) Weigh 30 g of glucose and dissolve it in 150 ml of deionized water, and stir for 12 hours to obtain a glucose solution.

[0058] (1.2) The glucose solution obtained in step (1.1) was transferred to a polytetrafluoroethylene-lined hydrothermal reaction kettle for hydrothermal reaction at a temperature of 190° C. and a reaction time of 5 hours.

[0059] (1.3) The product after the hydrothermal reaction is separated from the solid and liquid using a centrifuge, and the resulting solid product is washed multiple times with deionized water and absolute ethanol, and the resulting solid product is placed in a drying box for drying to obtain carbon nanosphere material.

[0060] Step 2, preparation of flower-shaped nickel cobaltate material:

[0061] (2.1) At room temperature, the 0.2g carbon nanospheres obtained in step 1, 2.32g cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), 1.16g nickel nitrate hexahydrate (Ni(...

Embodiment 3

[0069] Step 1, prepare carbon nanosphere material:

[0070] (1.1) Weigh 25 g of glucose and dissolve it in 150 ml of deionized water, and stir for 11 hours to obtain a glucose solution.

[0071] (1.2) Move the glucose solution obtained in step (1.1) to a polytetrafluoroethylene-lined hydrothermal reaction kettle for hydrothermal reaction at a temperature of 180° C. and a reaction time of 4 hours.

[0072] (1.3) The product after the hydrothermal reaction is separated from the solid and liquid using a centrifuge, and the resulting solid product is washed multiple times with deionized water and absolute ethanol, and the resulting solid product is placed in a drying box for drying to obtain carbon nanosphere material.

[0073] Step 2, preparation of flower-shaped nickel cobaltate material:

[0074] (2.1) At room temperature, the 0.15g carbon nanospheres obtained in step 1, 2.4g cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), 1.2g nickel nitrate hexahydrate (Ni(NO 3 ) 2 ·...

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Abstract

A flower-shaped nickel phosphide nickel cobaltate material, its preparation method and application. In the preparation process: firstly, glucose is dissolved in deionized water, stirred and put into a reaction kettle for hydrothermal reaction, and carbon nanospheres are obtained after washing and drying Materials; secondly, add cobalt nitrate hexahydrate, nickel nitrate hexahydrate, and urea into the mixed solution of deionized water and absolute ethanol, stir and put them into the reactor for hydrothermal reaction, washing and drying; finally, the sample and sodium hypophosphite are placed in two crucibles respectively, and they are placed in the muffle furnace one after the other, sodium hypophosphite is placed in front, and nitrogen gas is passed through to heat to obtain flower-shaped nickel cobaltate phosphide electrode material . Electrochemical tests have proved that the flower-shaped nickel cobaltate phosphide material of the present invention has excellent charge-discharge performance and cycle stability. Under the charge-discharge current of 70A / g, the specific capacitance is 466F / g; the reaction conditions are easy to control, The preparation process is simple, and the obtained product has the advantages of good consistency, which is beneficial to the industrialized production of the nickel cobaltate.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and relates to a flower-shaped nickel cobaltate phosphide electrode material prepared by a chemical method, in particular to a flower-shaped nickel cobaltate phosphide material, a preparation method and an application. [0002] technical background [0003] In the 21st century, due to the rapid consumption of natural energy, there is a serious environmental crisis, which drives us to find clean and sustainable energy as soon as possible. In this regard, the development of energy storage technology is an important way to solve the above problems. In today's society, a series of energy storage devices, such as batteries and supercapacitors, have been developed. Compared with other energy storage devices, supercapacitors have great application potential due to their high power density, long-term cycle stability, and safety in use. However, the energy density of current supercapacitors is insufficient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00C01G51/00H01G11/26H01G11/30H01G11/86
CPCC01G53/006C01G51/40H01G11/30H01G11/26H01G11/86C01P2002/72C01P2004/03C01P2006/40C01P2004/30
Inventor 尹宝熠郝亮李晓干王晨
Owner DALIAN UNIV OF TECH
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