Preparation method and application of nickel-mesh-based current collector electrode plate

A technology of current collectors and electrode sheets is applied in the field of preparation of electrode sheets based on nickel mesh current collectors, which can solve the problems of increasing the contact area between electrode materials and current collectors, reducing the utilization rate of active materials, and hindering the contact of electrolytes, and achieves a solution to the problem. The effect of poor adhesion, improving the hanging effect and shortening the production time

Inactive Publication Date: 2021-02-23
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In supercapacitors based on the electric double layer energy storage mechanism, carbon materials are the most commonly used materials for making electrodes, which requires that the electrode materials have a large specific surface area and good electrical conductivity. In order to ensure good conductivity when using carbon materials, the traditional method is usually a composite conductive agent or a high-conductivity material. Although this method does improve the conductivity and ion transport performance of the electrode, at the same time, it also needs to introduce a certain proportion of insulation. A polymer binder is used to improve the binding ability between the active material and the current collector. However, the large contact resistance between the active material and the current collector will have a great impact on the conductivity of the electrode, and will also make the Some active materials are blocked by binders, which prev

Method used

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  • Preparation method and application of nickel-mesh-based current collector electrode plate
  • Preparation method and application of nickel-mesh-based current collector electrode plate
  • Preparation method and application of nickel-mesh-based current collector electrode plate

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Embodiment 1

[0033] This embodiment provides a method for making a soft-pack laminated supercapacitor based on a nickel mesh current collector electrode sheet, comprising the following steps:

[0034] The first step is to make electrode sheets based on nickel mesh current collectors

[0035] (1) Add the mixture of activated carbon, carbon nanotubes and acetylene black, CMC and SBR according to the mass ratio of 9.3:0.2:0.3:0.2, and add the materials of the mixture of CMC, carbon nanotubes and acetylene black, activated carbon and SBR in sequence Add and mix for 8 hours, and then mix the slurry with a planetary ball mill to achieve the purpose of uniform dispersion of the material and prepare the slurry;

[0036] (2) Put the slurry in a blast drying oven, and dry it by blast drying at a temperature of 80° C. for 72 hours to obtain an active material precursor;

[0037] (3) adding absolute ethanol to the active material precursor with a mass ratio of active material to absolute ethanol of 1...

Embodiment 2

[0045] A preparation method based on a nickel mesh current collector electrode sheet, comprising the steps of:

[0046](1) The mixture of activated carbon, carbon nanotubes and acetylene black, CMC and SBR are added to the reaction in sequence with the mixture of activated carbon, carbon nanotubes and acetylene black, CMC and SBR in a mass ratio of 9:0.5:0.3:0.2 Mix in the container for 8 hours, and then mix the slurry with a planetary ball mill, so that the material can be evenly dispersed, and the slurry is obtained;

[0047] (2) Put the slurry in a blast drying oven, and dry it by blast drying at a temperature of 80° C. for 72 hours to obtain the active material precursor;

[0048] (3) Add absolute ethanol to the active material precursor for demulsification and paste with the mass ratio of active material and absolute ethanol being 1:0.5, and then grind for 3 hours to prepare a slurry;

[0049] (4) Use a nickel mesh with a thickness of 0.02mm-0.1mm and a size of 56mm*40mm...

Embodiment 3

[0055] A preparation method based on a nickel mesh current collector electrode sheet, comprising the steps of:

[0056] (1) The mixture of activated carbon, carbon nanotubes and acetylene black, CMC and SBR are added to the reaction in sequence with the mixture of activated carbon, carbon nanotubes and acetylene black, CMC and SBR at a mass ratio of 8.8:0.7:0.3:0.2 Mix in the container for 8 hours, and then mix the slurry with a planetary ball mill, so that the material can be evenly dispersed, and the slurry is obtained;

[0057] (2) Put the slurry in a blast drying oven, and dry it by blast drying at a temperature of 80° C. for 72 hours to obtain the active material precursor;

[0058] (3) Add absolute ethanol to the active material precursor for demulsification and paste with the mass ratio of active material and absolute ethanol being 1:1, and then grind for 3 hours to prepare a slurry;

[0059] (4) Use a nickel mesh with a thickness of 0.02mm-0.1mm and a size of 56mm*40m...

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Abstract

The invention belongs to the technical field of energy, and particularly relates to a preparation method and application of a nickel-mesh-based current collector electrode slice. The preparation method comprises the following steps: (1) sequentially adding and mixing activated carbon, carbon nanotubes, graphene, CMC and SBR, and then treating by a planetary stirrer to achieve the purpose of uniform dispersion of the material, so as to obtain slurry; (2) carrying out forced air drying on the slurry to prepare an active substance precursor; (3) carrying out demulsification and paste mixing on the active substance precursor by taking absolute ethyl alcohol as a solvent to prepare paste; and (4) taking a nickel net as a current collector, putting the nickel net into a template, adding the paste, pressing into a mold, and drying. The nickel-mesh-based current collector electrode plate prepared by the method is used for manufacturing a soft package laminated supercapacitor, and the rate capability of the supercapacitor can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of energy, and in particular relates to a preparation method and application of a nickel mesh current collector electrode sheet. Background technique [0002] As a new type of energy storage device, supercapacitors have been a hot research topic due to their advantages such as high charge and discharge efficiency, long cycle life, high power density, and no short circuit. Supercapacitors, also known as electrochemical capacitors, store energy through electric double layer capacitance (ion adsorption and desorption) or pseudocapacitance (surface redox reaction), and its electrodes are usually composed of porous carbon materials with high specific surface area. [0003] The working principle of the electric double layer supercapacitor is: under the action of an external electric field during the charging process, the positive electrode will absorb the anions in the electrolyte, and the negative electrode will ...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/34H01G11/24H01G11/28H01G11/30H01G11/36
CPCH01G11/86H01G11/34H01G11/24H01G11/28H01G11/30H01G11/36Y02E60/13
Inventor 陈安国付紫微石斌周雄廖敏会刁思强陈晓涛刘江涛刘富亮
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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