Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF6 Cites 1 Cited by
  • 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 prevents the electrolyte from contacting them and reduces the utilization of active materials
[0004] Compared with traditional current collectors such as aluminum foil and microporous aluminum foil for supercapacitors, using nickel mesh as the current collector of supercapacitor pole pieces can form a conductive network with a three-dimensional skeleton structure, which can greatly increase the electrode material. The contact area between the electrode material and the current collector reduces the resistance between the electrode material particles and the current collector, thereby greatly improving the rate performance of the supercapacitor; however, due to the porous nickel mesh current collector when the slurry is coated, the slurry The phenomenon that the slurry is separated from the nickel mesh due to poor adhesion with the nickel mesh current collector hinders the application of the nickel mesh in the supercapacitor current collector process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com