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Method for preparing in-situ Ni-doped Co-MOF-74 supercapacitor electrode material

A supercapacitor, co-mof-74 technology, applied in the field of electrochemical energy storage, can solve the problems of cumbersome steps, poor conductivity of MOFs, unsuitable for industrial production, etc., and achieve the effects of simple operation, low cost, and excellent electrochemical performance.

Inactive Publication Date: 2019-08-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is to solve the technical problems of poor conductivity, high method cost, cumbersome steps and unsuitability for industrialized production in the preparation of MOFs at present, and provides a preparation method of in-situ Ni-doped Co-MOF-74 supercapacitor electrode material

Method used

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  • Method for preparing in-situ Ni-doped Co-MOF-74 supercapacitor electrode material
  • Method for preparing in-situ Ni-doped Co-MOF-74 supercapacitor electrode material
  • Method for preparing in-situ Ni-doped Co-MOF-74 supercapacitor electrode material

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Embodiment 1

[0032] A kind of preparation method of in-situ Ni-doped Co-MOF-74 supercapacitor electrode material, comprises steps as follows:

[0033] Co-MOF-74 was synthesized by in situ growth method: 0.75g of cobalt nitrate and 0.1825g of 2.5-dihydroxyterephthalic acid were dissolved in 60mL of N.N-dimethylformamide, and the clear solution was obtained by ultrasonic oscillation for 10min , then add 3.6mL water and 3.6mL ethanol, continue to shake for 20min, then add the solution into the inner tank of the reactor, place the cleaned foam nickel vertically in the inner tank, then put it into the reactor, React at a temperature of 120°C for 24 hours, cool naturally to room temperature, open the reactor, take the sample out of the reactor, wash it repeatedly with deionized water and absolute ethanol, and dry it in a vacuum oven at 60°C for 24 hours , and finally the sample was taken out to obtain pure Co-MOF-74.

[0034] Co-MOF-74 is used as working electrode, platinum sheet is used as aux...

Embodiment 2

[0036] A kind of preparation method of in-situ growth Ni-doped Co-MOF-74 supercapacitor electrode material, comprises steps as follows:

[0037]Ni / Co-MOF-74 was synthesized by in situ growth method: 0.75g of cobalt nitrate, 0.15g of nickel nitrate, and 0.1825g of 2.5-dihydroxyterephthalic acid were dissolved in 60mL of N.N-dimethylformamide, Ultrasonic vibration for 10 minutes to obtain a clear solution, then add 3.6mL of water and 3.6mL of ethanol, continue to shake for 20min, then add the solution into the inner tank of the reaction kettle, place the cleaned foam nickel vertically in the inner tank, and then put Put it into the reaction kettle, react at a temperature of 120°C for 24 hours, cool naturally to room temperature, open the reaction kettle, take the sample out of the reaction kettle, wash it repeatedly with deionized water and absolute ethanol, Dry in a vacuum oven for 24 hours, and finally take out the sample to obtain Ni / Co-MOF-74.

[0038] Ni / Co-MOF is used as ...

Embodiment 3

[0040] A kind of preparation method of in-situ growth Ni-doped Co-MOF-74 supercapacitor electrode material, comprises steps as follows:

[0041] Ni / Co-MOF-74 was synthesized by in situ growth method: 0.75g of cobalt nitrate, 0.375g of nickel nitrate, and 0.1825g of 2.5-dihydroxyterephthalic acid were dissolved in 60mL of N.N-dimethylformamide, respectively. Ultrasonic vibration for 10 minutes to obtain a clear solution, then add 3.6mL of water and 3.6mL of ethanol, continue to shake for 20min, then add the solution into the inner tank of the reaction kettle, place the cleaned foam nickel vertically in the inner tank, and then put Put it into the reaction kettle, react at a temperature of 120°C for 24 hours, cool naturally to room temperature, open the reaction kettle, take the sample out of the reaction kettle, wash it repeatedly with deionized water and absolute ethanol, Dry in a vacuum oven for 24 hours, and finally take out the sample to obtain Ni / Co-MOF-74.

[0042] Ni / Co...

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Abstract

The invention relates to a method for preparing an in-situ Ni-doped Co-MOF-74 supercapacitor electrode material and belongs to the technical field of electrochemical energy storage. The method is characterized in that MOF-74 is selected as an MOF material, and the Co-MOF-74 is subjected to Ni doping through the in-situ growth method; cobalt nitrate and nickel nitrate are taken as a cobalt source and a nickel source, 2.5-dihydroxyterephthalic acid is an organic ligand, pure Co-MOF-74 and Ni-doped Co-MOF-74 synthesized in situ through the hydrothermal method are utilized, influence of differentNi doping amounts on the specific capacitance is studied, and excellent electrochemical performance is presented. The method is advantaged in that operation is simple and convenient, cost is low, thepotential application value in preparation of the supercapacitor electrode material is presented, and the direction for preparing supercapacitors with broad application prospects is indicated.

Description

technical field [0001] The invention relates to a method for preparing an in-situ Ni-doped Co-MOF-74 supercapacitor electrode material, belonging to the technical field of electrochemical energy storage. [0002] technical background [0003] With the rapid development of the electronics industry and the increasingly severe energy problems, new energy storage devices have gradually entered people's field of vision. Due to the advantages of high power, long life, large capacity and environmental protection, supercapacitors have broad application prospects in wind power generation, new energy vehicles and smart grids. According to the different energy storage mechanisms of supercapacitors, they can be divided into electric double layer capacitors (carbon materials) and pseudocapacitors (oxides and high molecular conductive polymers). Due to the advantages of large specific surface area, various types and easy synthesis of metal-organic framework materials, the researchers foun...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/86
CPCH01G11/30H01G11/86Y02E60/13
Inventor 刘晶冰郭仕权徐小龙汪浩张倩倩严辉
Owner BEIJING UNIV OF TECH
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