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A kind of preparation method of mofs-derived nio electrode material

A technology of electrode material and deionized water, which is applied in the field of preparation of NiO electrode materials, can solve the problems of small amount of prepared samples and easy agglomeration, and achieve the effect of overcoming small amount of samples, low equipment requirements, and high rate performance

Active Publication Date: 2022-08-02
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for preparing a NiO electrode material derived from MOFs in order to solve the problem that the amount of samples prepared by the existing NiO electrode material is small and agglomeration is easy to occur.

Method used

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  • A kind of preparation method of mofs-derived nio electrode material
  • A kind of preparation method of mofs-derived nio electrode material
  • A kind of preparation method of mofs-derived nio electrode material

Examples

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Effect test

Embodiment 1

[0032] A preparation method of MOFs-derived NiO electrode material, the method is realized by the following steps:

[0033] S1: Preparation of solution A: First, dissolve 2.4 mmol of nickel nitrate hexahydrate in 80 mL of deionized water, and stir evenly with magnetic force; This obtains solution A;

[0034] S2: Preparation of solution B: Weigh 1.6 mmol of potassium cobalt cyanide and dissolve it in 80 mL of deionized water, and stir uniformly with magnetic force to obtain solution B;

[0035] S3: Preparation of Precipitate C: Pour solution B into solution A and stir magnetically for 25min; after stirring, let stand for 30h to collect blue-white precipitate C;

[0036] S4: Washing of Precipitate C: First, wash Precipitate C with deionized water three times, then wash Precipitate C three times with absolute ethanol, and then centrifuge at a speed of 6000 rpm for 8 min to obtain Washed Precipitate C;

[0037] S5: Drying: The washed precipitate C was placed in a 60°C oven to dr...

Embodiment 2

[0046] A preparation method of MOFs-derived NiO electrode material, the method is realized by the following steps:

[0047] S1: Preparation of solution A: First, take 4.5 mmol of nickel nitrate hexahydrate and dissolve it in 75 mL of deionized water, and stir evenly with magnetic force; This obtains solution A;

[0048] S2: Preparation of solution B: Weigh 3.0 mmol of potassium cobalt cyanide and dissolve it in 75 mL of deionized water, and stir uniformly with magnetic force to obtain solution B;

[0049] S3: Preparation of Precipitate C: Pour solution B into solution A, stir magnetically for 10min; after stirring, let stand for 12h to collect blue-white precipitate C;

[0050] S4: Washing of Precipitate C: First, wash Precipitate C with deionized water for six times, then wash Precipitate C with absolute ethanol for six times, and then centrifuge at 8000 rpm for 5 min to obtain washed Precipitate C ;

[0051] S5: drying: the washed precipitate C is placed in a 40°C oven to...

Embodiment 3

[0054] A preparation method of MOFs-derived NiO electrode material, the method is realized by the following steps:

[0055] S1: Preparation of solution A: First, take 3.0 mmol of nickel nitrate hexahydrate and dissolve it in 120 mL of deionized water, and stir evenly with magnetic force; This obtains solution A;

[0056] S2: Preparation of solution B: Weigh 2.0 mmol of potassium cobalt cyanide and dissolve it in 120 mL of deionized water, and stir uniformly with magnetic force to obtain solution B;

[0057] S3: Preparation of Precipitate C: Pour solution B into solution A and stir magnetically for 30min; after stirring, let stand for 36h to collect blue-white precipitate C;

[0058] S4: Washing of Precipitate C: First, wash Precipitate C with deionized water four times, then wash Precipitate C with absolute ethanol four times, and then centrifuge at 5000 rpm for 10 min to obtain washed Precipitate C ;

[0059] S5: Drying: The washed precipitate C is placed in an oven at 80°...

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Abstract

The invention specifically relates to a preparation method of a NiO electrode material derived from MOFs, which solves the problems of less sample volume and easy agglomeration in the preparation method of the existing NiO electrode material. A preparation method of MOFs-derived NiO electrode material, the method is realized by the following steps: S1: dissolving nickel nitrate hexahydrate in deionized water; S2: adding sodium citrate dihydrate to the solution to obtain solution A; S3 : dissolve potassium cobalt cyanide in deionized water to obtain solution B; S4: pour solution B into solution A, stir and let stand to obtain precipitate C; S5: wash the precipitate with deionized water and absolute ethanol to obtain Washed precipitate C; S6: drying to obtain powder C; S7: heat treatment of powder C to prepare NiO supercapacitor electrode material. In the present invention, NiCo-PBA is used as a precursor, and NiO supercapacitor electrode material with good performance is obtained by direct calcination. The present invention has simple operation process, low production cost, and can realize mass preparation.

Description

technical field [0001] The invention relates to a preparation method of a supercapacitor electrode material, in particular to a preparation method of a MOFs-derived NiO electrode material. Background technique [0002] Nickel oxide (NiO) has the advantages of low cost, environmental friendliness, and high electrochemical activity, and its theoretical specific capacitance is as high as 2584 F / g, which is considered as a potential supercapacitor electrode material. At present, the methods of synthesizing NiO electrode materials include chemical precipitation, hydrothermal, solvothermal, and electrodeposition. [0003] However, practice shows that the existing preparation methods of NiO electrode materials have the following problems in application: firstly, NiO prepared by chemical precipitation method is easy to agglomerate, which is not conducive to exerting its electrochemical performance; secondly, hydrothermal, solvothermal and electrodeposition methods are once The amou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86
CPCH01G11/86Y02E60/13
Inventor 张惠芳赵河明戚俊成周春桂王文琪韩晶彭志凌张冬梅
Owner ZHONGBEI UNIV
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