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Preparation method and application of flexible nickel-cobalt double hydroxide/metal organic framework/fabric electrode

A metal-organic framework and double hydroxide technology, which is applied in the direction of alkaline storage battery electrodes, battery electrodes, nickel storage batteries, etc., can solve the problems of shortening the charge transmission path and reducing electrochemical impedance, so as to improve specific capacitance and cycle life , Improve the specific capacitance and good stability

Inactive Publication Date: 2021-05-07
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a precursor, the metal-organic framework makes the active material evenly loaded, more orderly, shortens the charge transmission path, and reduces the electrochemical impedance. Its framework can effectively solve the problem of nickel positive electrode expansion and improve stability.

Method used

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  • Preparation method and application of flexible nickel-cobalt double hydroxide/metal organic framework/fabric electrode
  • Preparation method and application of flexible nickel-cobalt double hydroxide/metal organic framework/fabric electrode
  • Preparation method and application of flexible nickel-cobalt double hydroxide/metal organic framework/fabric electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing a flexible nickel-cobalt double hydroxide / metal organic framework / fabric electrode, the method comprising the following steps:

[0035] (1) Put the cut nickel-plated fabric (4*4cm) into a beaker filled with absolute ethanol, stir it ultrasonically for 10-30 minutes, and then dry it for later use;

[0036] (2) Weigh 0.43gCo(NO 3 ) 2 ·6H 2 O and 0.99g 2-methylimidazole were dissolved in 30mL deionized water respectively, and stirred evenly to form solution A;

[0037] (3) Put the fabric obtained in step (1) into the above-mentioned solution A, conduct a hydrothermal reaction at 20°C for 1 hour, take it out, wash and dry it, and obtain a metal organic framework / fabric;

[0038] (4) Weigh 0.17gNiSO 4 ·6H 2 O was dissolved in 40mL of deionized water, stirred evenly to obtain solution B, put the sample obtained in step (3) into the above solution B, and reacted hydrothermally at 20°C for 1.5 hours, took it out, washed and dried, and obtained nickel...

Embodiment 2

[0045] A method for preparing a flexible nickel-cobalt double hydroxide / metal organic framework / fabric electrode, the method comprising the following steps:

[0046] (1) Put the cut nickel-plated fabric (4*4cm) into a beaker filled with absolute ethanol, stir it ultrasonically for 10-30 minutes, and then dry it for later use;

[0047] (2) Weigh 0.43gCo(NO 3 ) 2 ·6H 2 O and 0.99g 2-methylimidazole were dissolved in 30mL deionized water respectively, and stirred evenly to form solution A;

[0048] (3) Put the fabric obtained in step (1) into the above-mentioned solution A, conduct a hydrothermal reaction at 20°C for 4 hours, take it out, wash and dry it, and obtain a metal organic framework / fabric;

[0049] (4) Weigh 0.17gNiSO 4 ·6H 2 O was dissolved in 40mL of deionized water, stirred evenly to obtain solution B, put the sample obtained in step (3) into the above solution B, and reacted hydrothermally at 20°C for 1.5 hours, took it out, washed and dried, and obtained nicke...

Embodiment 3

[0052] A method for preparing a flexible nickel-cobalt double hydroxide / metal organic framework / fabric electrode, the method comprising the following steps:

[0053] (1) Put the cut nickel-plated fabric (1*1cm) into a beaker filled with absolute ethanol, stir it ultrasonically for 10-30 minutes, and then dry it for later use;

[0054] (2) Weigh 0.43gCo(NO 3 ) 2 ·6H 2 O and 0.99g 2-methylimidazole were dissolved in 30mL deionized water respectively, and stirred evenly to form solution A;

[0055] (3) Put the fabric obtained in step (1) into the above-mentioned solution A, conduct a hydrothermal reaction at 10°C for 4 hours, take it out, wash and dry it, and obtain a metal organic framework / fabric;

[0056] (4) Weigh 0.17gNiSO 4 ·6H 2 O was dissolved in 40mL of deionized water, stirred evenly to obtain solution B, put the sample obtained in step (3) into the above solution B, and reacted hydrothermally at 20°C for 6 hours, took it out, washed and dried, and obtained nickel-...

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Abstract

The invention provides a preparation method of a flexible nickel-cobalt double hydroxide / metal organic framework / fabric flexible electrode. The preparation method comprises the following steps of: (1) dissolving cobalt salt in deionized water with the concentration of 0.01-0.5 mol L <-1>; dissolving an organic compound in deionized water, and stirring until the concentration is 0.1-1 mol L <-1>; and mixing the two solutions in equal volume, adding cleaned conductive fabric, carrying out hydrothermal reaction, washing and drying the fabric to obtain a metal organic framework / fabric. and (2) dissolving nickel salt in deionized water with the concentration of 0.01-0.5 mol L <-1>, putting the sample obtained in the step (1) into the solution, carrying out a reaction, performing washing and drying to obtain the nickel-cobalt double hydroxide / metal organic framework / fabric electrode. The invention further provides application of the fabric electrode in the field of nickel-zinc flexible batteries. The electrode has the characteristics of good flexibility, high specific capacity, good rate capability, good cycling stability and the like.

Description

technical field [0001] The invention belongs to the field of nickel-cobalt double hydroxide nickel electrode material and its preparation and application, in particular to a preparation method and application of a flexible nickel-cobalt double hydroxide / metal organic framework / fabric electrode. Background technique [0002] In recent years, with the rapid development of science and technology, the rise of various wearable smart electronic devices and the vigorous development of energy vehicles, higher requirements have been placed on the performance of chemical power sources. It is very important to develop safe, efficient and flexible electrochemical energy storage devices. Nickel-zinc batteries have received more and more attention in recent years because of their advantages such as cheap and easy-to-obtain raw materials, low production costs, environmental friendliness, high output voltage, and high power density. Compared with cadmium-nickel batteries and lead-acid batt...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M4/24H01M4/28H01M10/30
CPCH01M4/24H01M4/28H01M4/362H01M4/52H01M4/62H01M4/624H01M4/628H01M10/30Y02E60/10
Inventor 夏兆鹏杨超潘佳俊吴茂琪刘皓刘雍王亮毛照婓
Owner TIANJIN POLYTECHNIC UNIV
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