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Preparation method of Ni-MOF electrode material

An electrode material, nickel nitrate technology, applied in the field of materials science, can solve the problems of rare supercapacitor electrodes, and achieve the effects of good electrochemical performance, high rate performance and high cycle performance

Inactive Publication Date: 2015-10-14
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is rare to directly use MOFs materials as supercapacitor electrodes

Method used

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  • Preparation method of Ni-MOF electrode material
  • Preparation method of Ni-MOF electrode material
  • Preparation method of Ni-MOF electrode material

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Experimental program
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Effect test

Embodiment 1

[0022] A method for preparing a Ni-MOF electrode material, specifically comprising the steps of:

[0023] (1) with N,N-dimethylformamide (DMF) as solvent, preparation concentration is the PTA / DMF solution of 0.005mol / l, with water as solvent, preparation concentration is the nickel nitrate aqueous solution of 0.0075mol / l; ( 2) The above-mentioned nickel nitrate aqueous solution is added in the PTA / DMF solution at a speed of 3ml / min, and the volume ratio of the two is controlled to be 2-1. After dissolving and stirring for 1h, the total concentration of PTA obtained is 0.0016mol / L. Precursor solution with a total concentration of 0.0025 mol / l.

[0024] (3) The precursor solution in (2) was subjected to solvothermal reaction in a hydrothermal kettle at 120°C for 24 hours, and the obtained green precipitate was washed by centrifugation with DMF and absolute ethanol, filtered, and dried at 80°C to obtain Ni-MOF electrode material with good electrochemical performance.

[0025] T...

Embodiment 2

[0028] A method for preparing a Ni-MOF electrode material, specifically comprising the steps of:

[0029] (1) with N,N-dimethylformamide (DMF) as solvent, preparation concentration is the PTA / DMF solution of 0.01mol / l, with water as solvent, preparation concentration is the nickel nitrate aqueous solution of 0.05mol / l; ( 2) The above-mentioned nickel nitrate aqueous solution is added in the PTA / DMF solution at a speed of 3ml / min, and the volume ratio of the two is controlled to be 2-1. After dissolving and stirring for 1h, the total concentration of PTA obtained is 0.003mol / L. Precursor solution with a total concentration of 0.016 mol / l.

[0030] (3) The precursor solution in (2) was subjected to solvothermal reaction in a hydrothermal kettle at 140°C for 24 hours, and the obtained green precipitate was washed by centrifugation with DMF and absolute ethanol, filtered, and dried at 80°C to obtain Ni-MOF electrode material with good electrochemical performance.

[0031] The X-...

Embodiment 3

[0034] A method for preparing a Ni-MOF electrode material, specifically comprising the steps of:

[0035] (1) with N,N-dimethylformamide (DMF) as solvent, preparation concentration is the PTA / DMF solution of 0.015mol / l, with water as solvent, preparation concentration is the nickel nitrate aqueous solution of 0.0225mol / l; ( 2) Add the above-mentioned nickel nitrate aqueous solution into the PTA / DMF solution at a rate of 3ml / min, control the volume ratio of the two to 2-1, dissolve and stir for 1-2 hours, and obtain a total concentration of PTA of 0.005mol / L, nitric acid The total concentration of nickel is 0.0075 mol / l in the precursor solution.

[0036] (3) The precursor solution in (2) was subjected to solvothermal reaction in a 160°C hydrothermal kettle for 24 hours, and the resulting green precipitate was centrifugally washed with DMF and absolute ethanol, filtered, and dried at 80°C to obtain Ni-MOF electrode material with good electrochemical performance.

[0037] The X-...

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Abstract

Disclosed in the invention is a preparation method of a Ni-MOF electrode material. A nicdel nitrate aqueous solution with the total concentration of 0.0075 to 0.43mol / l is added into a PTA / DMF solution with the total concentration of 0.005 to 0.03 mol / l, wherein the adding speed is 2 to 5ml / min and the volume ration of the nicdel nitrate aqueous solution to the terephthalic acid solution is 1.5-3 :1; after dissolution stirring of 1 to 2 hours, a precursor solution is obtained; solvothermal reaction is carried out on the precursor solution for 12 to 48 hours in a hydro-thermal kettle with the temperature of 120 to 200 DEG C, centrifugal washing and filtering are carried out on an obtained green precipitate respectively by DMF and absolute ethyl alcohol, and drying is carried out under the temperature of 80 DEG C, thereby obtaining a Ni-MOF electrode material. According to the preparation method, the specific capacitance of the material can be up to 1500F / g; after 3000-times charging and discharging circulation, 90% of specific capacitance still can be kept. The method is simple and can be controlled easily; the conditions are mild; and the production cost is low.

Description

technical field [0001] The invention belongs to the field of materials science, and in particular relates to an electrode material for a supercapacitor, in particular to a method for preparing a Ni-MOF electrode material. Background technique [0002] In today's increasingly serious environmental pollution and the gradual depletion of fossil fuels, it is particularly important to seek energy storage devices with high energy density. As one of the most reliable electrochemical energy storage systems, supercapacitors have attracted widespread attention due to their excellent energy density and fast charge-discharge performance. Electrode materials are the core components of supercapacitors, and their composition, structure and properties play a decisive role in the performance of capacitors. [0003] Metal-organic frameworks (MOFs), also known as porous coordination polymers (PCPs), usually refer to the periodic formation of metal ions or metal clusters and organic ligands th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/26H01G11/48H01G11/30
CPCY02E60/13H01G11/86H01G11/24H01G11/26H01G11/30H01G11/48
Inventor 房永征章开张娜祁鹏金建群杨洪班元浩
Owner SHANGHAI INST OF TECH
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