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Preparation method and application of nickel cobaltate / hierarchical pore carbon electrode material

A technology of multi-level pores and nickel cobalt oxide, which is applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, chemical instruments and methods, etc., can solve the problems of poor cycle stability and achieve easy operation, convenient and quick preparation methods, Effects suitable for promotional use

Inactive Publication Date: 2017-09-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, two common metal oxides NiO and Co as electrode materials 3 o 4 , the former usually has a high specific capacitance when used as an electrode material, and the biggest disadvantage is poor cycle stability; although the latter has a lower specific capacitance than the former, it has better cycle stability and rate performance

Method used

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  • Preparation method and application of nickel cobaltate / hierarchical pore carbon electrode material
  • Preparation method and application of nickel cobaltate / hierarchical pore carbon electrode material

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Embodiment 1

[0029] First, a certain amount of EDTA-3K was weighed into a 30mL nickel crucible and then placed in a tube furnace for calcination under the protection of a nitrogen atmosphere. It was raised from room temperature to 700 °C and maintained for 1.0 h, and the heating rate was controlled at 3.0 °C min -1 . After natural cooling, the black product was taken out, placed in an excess of dilute hydrochloric acid (5wt%) solution, magnetically stirred for 2 hours to remove impurities, and then washed with a large amount of deionized water to about pH=7.0, and dried at 60°C to obtain EDTA-3K based porous carbon materials.

[0030] Weigh 0.2g EDTA-3K-based porous carbon material and disperse it in 30mL deionized water, sonicate for 30min, while 1.0mmol CoCl 2 ·6H 2 O and 30 mmol of urea were dissolved in 35 mL of deionized water, stirred vigorously for 20 min, then added to the EDTA-3K-based porous carbon dispersion, and stirred gently at room temperature for 15 min to fully contact t...

Embodiment 2

[0034] First, a certain amount of EDTA-3K was weighed into a 30mL nickel crucible, placed in a tube furnace, and calcined under the protection of a nitrogen atmosphere. It was raised from room temperature to 800 °C and maintained for 1.0 h, and the heating rate was controlled at 7.0 °C min -1 . After natural cooling, the black product was taken out, placed in an excess of dilute hydrochloric acid (15wt%) solution, magnetically stirred for 2 hours to remove impurities, and then washed with a large amount of deionized water to about pH=7.0, and dried at 60°C to obtain EDTA-3K based porous carbon materials.

[0035] Weigh 0.2g EDTA-3K-based porous carbon material and disperse it in 30mL deionized water, sonicate for 30min, while 1.0mmol CoCl 2 ·6H 2 O and 30 mmol of urea were dissolved in 35 mL of deionized water, stirred vigorously for 20 min, then added the EDTA-3K-based porous carbon dispersion, and stirred gently at room temperature for 15 min to fully contact the two. The...

Embodiment 3

[0037] First, a certain amount of EDTA-3K was weighed into a 30mL nickel crucible, placed in a tube furnace, and calcined under the protection of a nitrogen atmosphere. It was raised from room temperature to 800 °C and maintained for 1.0 h, and the heating rate was controlled at 7.0 °C min -1 . After natural cooling, the black product was taken out, placed in an excess of dilute hydrochloric acid (15wt%) solution, magnetically stirred for 2 hours to remove impurities, and then washed with a large amount of deionized water to about pH=7.0, and dried at 60°C to obtain EDTA-3K based porous carbon materials.

[0038] Weigh 0.2g EDTA-3K-based porous carbon material and disperse it in 30mL deionized water, sonicate for 30min, and at the same time dissolve 1.0mmol NiCl 2 ·6H 2O and 30 mmol of urea were dissolved in 35 mL of deionized water, stirred vigorously for 20 min, then added to the EDTA-3K-based porous carbon dispersion, and stirred gently at room temperature for 15 min to f...

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Abstract

The invention provides a preparation method and an application of a nickel cobaltate / hierarchical pore carbon electrode material. The preparation method comprises the following steps: 1) preparing an EDTA-3K-based porous carbon material: carrying out calcination carbonization on EDTA-3K under protection of an inert gas, carrying out impurity acid pickling, suction filtration and water washing to neutral and carrying out drying to obtain the EDTA-3K-based porous carbon material; 2) doping of metal ions: dissolving metal salts and urea into deionized water to obtain a mixed solution A, stirring the solution intensely and then, adding the solution to dispersion liquid of the EDTA-3K-based porous carbon material obtained in the step 1), carrying out intensive mixing, and then, carrying out water bath reaction and computer microwave radiation reaction, centrifugalization, cleaning and drying; and 3) preparing a Co / Ni-doped EDTA-3K-based porous carbon material: calcining the product obtained in the step 2) in the air to obtain the nickel cobaltate / hierarchical pore carbon electrode material. The preparation method is convenient and fast, easy to operate and suitable for wide application.

Description

technical field [0001] The invention relates to a preparation method and application of a nickel cobaltate / hierarchical porous carbon electrode material, specifically a preparation method and application of a nickel cobaltate / hierarchical porous carbon electrode material, which belongs to the preparation technology of electrochemical materials field. Background technique [0002] Electrochemical capacitors have been widely used and paid attention to in the field of energy storage due to their advantages such as fast charge and discharge speed, high power density, long cycle life, and wide operating temperature range. However, there is still a lot of room for improvement in supercapacitors, and the research on supercapacitors mainly focuses on improving the energy density of the system. Firstly, the pore structure of the porous carbon material is optimized, and the utilization rate of the specific surface area of ​​the porous material is improved by adjusting the proportion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/32H01G11/30H01G11/24B01J23/755B01J32/00B01J35/10B01J20/20B01J20/28B01J20/30
CPCB01J20/0225B01J20/20H01G11/24H01G11/30H01G11/32H01G11/86B01J20/28B01J20/28054B01J20/30B01J23/755B01J35/33B01J35/61Y02E60/13
Inventor 戴江栋葛文娜谢阿田何劲松张瑞龙常忠帅田苏君闫永胜
Owner JIANGSU UNIV
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