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Preparation method of NiO electrode material derived from MOFs

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 easy agglomeration and small amount of prepared samples, and achieve low equipment requirements, overcome the effects of small sample amount and simple equipment

Active Publication Date: 2021-10-15
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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  • Preparation method of NiO electrode material derived from MOFs
  • Preparation method of NiO electrode material derived from MOFs
  • Preparation method of NiO electrode material derived from MOFs

Examples

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Effect test

Embodiment 1

[0032] A kind of preparation method of NiO electrode material derived from MOFs, this method is to adopt following steps to realize:

[0033] S1: Preparation of solution A: first weigh 2.4 mmol of nickel nitrate hexahydrate and dissolve it in 80 mL of deionized water, and stir it evenly; then weigh 3.6 mmol of sodium citrate dihydrate and dissolve it in the above solution, and stir it evenly by magnetic force. This gives solution A;

[0034] S2: Preparation of solution B: Weigh 1.6mmol potassium cobaltcyanide and dissolve it in 80mL deionized water, and stir evenly with magnetic force, thus obtaining solution B;

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

[0036] S4: Washing of the precipitate C: first wash the precipitate C three times with deionized water, then wash the precipitate C three times with absolute ethanol,...

Embodiment 2

[0046] A kind of preparation method of NiO electrode material derived from MOFs, this method is to adopt following steps to realize:

[0047] S1: Preparation of solution A: first weigh 4.5 mmol of nickel nitrate hexahydrate and dissolve it in 75 mL of deionized water, and stir it evenly; then weigh 4.5 mmol of sodium citrate dihydrate and dissolve it in the above solution, and stir it evenly by magnetic force. This gives solution A;

[0048] S2: Preparation of solution B: Weigh 3.0 mmol of potassium cobaltcyanide and dissolve it in 75 mL of deionized water, and stir evenly with magnetic force, thus obtaining solution B;

[0049] S3: Preparation of Precipitate C: Pour Solution B into Solution A, and stir magnetically for 10 minutes; after the stirring is completed, let it stand for 12 hours, and collect the blue-white Precipitate C;

[0050] S4: Washing of Precipitate C: First wash Precipitate C six times with deionized water, then wash Precipitate C six times with absolute et...

Embodiment 3

[0054] A kind of preparation method of NiO electrode material derived from MOFs, this method is to adopt following steps to realize:

[0055] S1: Preparation of solution A: First, weigh 3.0 mmol of nickel nitrate hexahydrate and dissolve it in 120 mL of deionized water, and stir it evenly; then weigh 9.0 mmol of sodium citrate dihydrate and dissolve it in the above solution, and stir it evenly by magnetic force. This gives solution A;

[0056] S2: Preparation of solution B: Weigh 2.0 mmol of potassium cobaltcyanide and dissolve it in 120 mL of deionized water, and magnetically stir evenly to obtain solution B;

[0057] S3: Preparation of Precipitate C: Pour solution B into solution A, and stir magnetically for 30 minutes; after stirring, let it stand for 36 hours, collect and obtain 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 centri...

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Abstract

The invention particularly relates to a preparation method of a NiO electrode material derived from MOFs (Metal-Organic Frameworks), and solves the problems that an existing preparation method of a NiO electrode material is relatively small in quantity of prepared samples and easy to agglomerate. The invention relates to a preparation method of a NiO electrode material derived from MOFs. The method is realized by adopting the following steps: S1, dissolving nickel nitrate hexahydrate in deionized water; S2, adding sodium citrate dehydrate into the solution to obtain a solution A; S3, dissolving cobalt potassium cyanide in deionized water to obtain a solution B; S4, pouring the solution B into the solution A, stirring, and standing to obtain a precipitate C; S5, washing the precipitate with deionized water and absolute ethyl alcohol to obtain a washed precipitate C; S6, drying to obtain powder C; and S7, carrying out heat treatment on the powder C to prepare the NiO supercapacitor electrode material. The NiCo-PBA is used as the precursor, the NiO supercapacitor electrode material with good performance is obtained through direct calcination, the operation process is simple, the production cost is low, and large-scale preparation can be achieved.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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