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

Carbon-coated aluminum foil and preparation method thereof

A technology of carbon-coated aluminum foil and aluminum foil, which is applied in the direction of electrode carriers/collectors, electrical components, battery electrodes, etc., can solve the problems of increased production costs, poor heat dissipation, and weak electrical conductivity, etc., to increase energy density and reduce poles. The effect of chemicalization and improvement of electrical conductivity

Inactive Publication Date: 2019-03-01
桑顿新能源科技(长沙)有限公司
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first layer uses a super P layer, which has poor electrical conductivity. The three-layer conductive layer composite process increases production costs and leads to poor heat dissipation.

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
  • Carbon-coated aluminum foil and preparation method thereof
  • Carbon-coated aluminum foil and preparation method thereof
  • Carbon-coated aluminum foil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An aluminum foil body, such as figure 1 As shown, the aluminum foil body 1, the CNT+Super P composite conductive layer 2 and the CNT conductive layer 3 are sequentially formed from the inside to the outside.

[0034] The preparation method of the carbon-coated aluminum foil is as follows:

[0035] 1) First, pre-treat the aluminum foil: use acetic acid to remove dirt and impurities on the surface of the aluminum foil;

[0036] 2) Mix the polytetrafluoroethylene and ethanol uniformly, then add CNT and Super P conductive agent, mix uniformly, and obtain a composite conductive slurry. Among them, the solid content of the composite conductive paste is 25%, the mass fraction of CNT is 15%, the mass fraction of Super P is 10%, the binder content is 5%, and the slurry viscosity is 250 mPa·S.

[0037] 3) Put the conductive slurry into the electrospinning device, adjust the electrospinning voltage to 20kV, and the solution flow rate to 2mL·h -1 , The distance between the electrostatic sp...

Embodiment 2

[0044] An aluminum foil body is composed of an aluminum foil body, a CNT+graphene composite conductive layer, and a CNT conductive layer 3 from the inside to the outside.

[0045] The preparation method of the carbon-coated aluminum foil is as follows:

[0046] 1) First, pre-treat the aluminum foil: use acetic acid to remove dirt and impurities on the surface of the aluminum foil;

[0047] 2) Mix the polytetrafluoroethylene and ethanol evenly, and then add the CNT and graphene conductive agent, and mix evenly to obtain a composite conductive paste. Among them, the solid content of the composite conductive paste is 15%, the mass fraction of CNT is 5%, the mass fraction of graphene is 10%, the binder content is 5%, and the slurry viscosity is 250 mPa·S.

[0048] 3) Put the conductive slurry into the electrospinning device, adjust the electrospinning voltage to 20kV, and the solution flow rate to 2mL·h -1 , The distance between the electrostatic spinning nozzle and the aluminum foil is 5...

Embodiment 3

[0052] An aluminum foil body is composed of an aluminum foil body, a CNT+Super P+graphene composite conductive layer and a CNT conductive layer 3 from the inside to the outside.

[0053] The preparation method of the carbon-coated aluminum foil is as follows:

[0054] 1) First, pre-treat the aluminum foil: use acetic acid to remove dirt and impurities on the surface of the aluminum foil;

[0055] 2) Mix the polytetrafluoroethylene and ethanol evenly, and then add CNT, Super P and graphene conductive agent, and mix evenly to obtain a composite conductive paste. Among them, the solid content of the composite conductive paste is 30%, the mass fraction of CNT is 15%, the mass fraction of graphene is 10%, the mass fraction of Super P is 5%, the binder content is 5%, and the slurry viscosity is 250 mPa·S.

[0056] 3) Put the conductive slurry into the electrospinning device, adjust the electrospinning voltage to 20kV, and the solution flow rate to 2mL·h -1 , The distance between the electro...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a carbon-coated aluminum foil and a preparation method thereof. The carbon-coated aluminum foil comprises an aluminum foil body, and the aluminum foil body comprises a composite conductive layer and a carbon nano tube (CNT) conductive layer, wherein the composite conductive layer and the CNT conductive layer are arranged outwards in sequence. The preparation method of the carbon-coated aluminum foil comprises the following steps that S1, the aluminum foil body is pretreated; S2, a binder and a solvent are mixed and stirred uniformly, then two or more conductive agents are added, uniform mixing is carried out, and composite conductive paste is obtained; S3, the composite conductive paste is loaded into an electrostatic spinning device, the aluminum foil body is sprayed, and then the first layer of composite carbon-coated aluminum foil is obtained by drying; S4, a binder and a solvent are mixed and stirred uniformly, a CNT conductive agent is added, uniform mixingis carried out, and CNT conductive paste is obtained; and S5, the CNT conductive paste is loaded into the electrostatic spinning device, the first layer of composite carbon-coated aluminum foil is sprayed with the CNT conductive layer, and the carbon-coated aluminum foil is obtained by drying. According to the carbon-coated aluminum foil and the preparation method thereof, the prepared double-layer coated carbon-coated aluminum foil improves the conductivity, the ratio performance and the cycle performance of the conductive agents and the aluminum foil body.

Description

Technical field [0001] The invention belongs to the technical field of lithium ion batteries, and specifically relates to a carbon-coated aluminum foil and a preparation method thereof. Background technique [0002] With the increasing depletion of petrochemical energy sources, the greenhouse effect continues to intensify, forcing people to constantly search for a new type of environmentally friendly new energy that can not only slow down the energy crisis, but also avoid environmental pollution. Therefore, lithium-ion batteries are used as the power of electric vehicles. The aluminum foil current collector has the function of attaching active materials and conducting electronic conduction in lithium batteries. In the currently used carbon-coated aluminum foil, the carbon-coated layer is generally composed of a single layer of conductive graphite and carbon black particles. The carbon-coated layer can reduce the contact resistance and polarization. However, as the requirements f...

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): H01M4/66
CPCH01M4/661H01M4/663H01M4/667Y02E60/10
Inventor 赵春阳娄忠良李瑞法
Owner 桑顿新能源科技(长沙)有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com