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

Copper foil-graphene current collector and preparation method thereof

A current collector, graphene composite technology, applied in the direction of graphite, sustainable manufacturing/processing, electrode carrier/current collector, etc., can solve the problems of reduced energy density and power density, shortened cycle life, unfavorable mass production, etc. Achieve the effects of inhibiting expansion and detachment, reducing interface polarization, and reducing thermal effects

Inactive Publication Date: 2018-02-23
张洪
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods will inevitably cause a series of adverse effects on battery performance: including the increase of battery internal resistance, the decrease of energy density and power density, the shortening of cycle life, and the increase of battery calorific value; The current collector produces a certain degree of surface damage, which reduces the strength of the foil and affects the subsequent processing of finished products, which is not conducive to large-scale production; and when the surface of the current collector is coated with a highly conductive material, if the material has better bonding performance, And compared with the metal current collector, it has better deformation ability, which can reduce the interface resistance and improve the conductivity between the active material and the current collector.

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
  • Copper foil-graphene current collector and preparation method thereof
  • Copper foil-graphene current collector and preparation method thereof
  • Copper foil-graphene current collector and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. A method for continuously preparing copper foil-graphene composite negative electrode current collectors

[0034] refer to figure 1 , a method for preparing a copper foil-graphene composite negative electrode current collector, the preparation method is prepared by a continuous chemical vapor deposition (CVD) method, and specifically includes the following steps:

[0035] 1) The copper foil enters the high temperature reaction equipment 3 smoothly through the air seal 32 under the joint traction drive of the feeding device and the discharging device;

[0036] 2) Pass the protective gas argon into the high temperature reaction equipment 3, and the gas supply volume is 1m 3 / h-10m 3 / h;

[0037] 3) Before the reaction, slowly pre-heat the high-temperature reaction equipment 3, and at the same time fill the gas seal device 31 with protective gas to ensure that the high-temperature area inside the equipment is in an oxygen-free state, and the temperature rise rate doe...

Embodiment 2

[0047] One, a kind of preparation method of copper foil-graphene composite negative electrode current collector

[0048] A method for preparing a copper foil-graphene composite negative electrode current collector is based on the equipment described in Example 1. The preparation method is prepared by a continuous chemical vapor deposition (CVD) method, and specifically includes the following steps:

[0049] 1) The copper foil enters the high temperature reaction equipment 3 smoothly through the air seal 32 under the joint traction drive of the feeding device and the discharging device;

[0050] 2) Pass the protective gas argon into the protective gas sealing device 31, and the gas supply volume is 1m 3 / h-10m 3 / h;

[0051] 3) Before the reaction, slowly pre-heat the high-temperature reaction equipment 3, and at the same time fill the gas seal device 31 with protective gas to ensure that the high-temperature area inside the equipment is in an oxygen-free state, and the tempe...

Embodiment 3

[0055] One, a kind of preparation method of copper foil-graphene composite negative electrode current collector

[0056] A method for preparing a copper foil-graphene composite negative electrode current collector is based on the equipment described in Example 1. The preparation method is prepared by a continuous chemical vapor deposition (CVD) method, and specifically includes the following steps:

[0057] 1) The copper foil enters the high temperature reaction equipment 3 smoothly through the air seal 32 under the joint traction drive of the feeding device and the discharging device;

[0058] 2) Pass the protective gas argon into the high temperature reaction equipment 3, and the gas supply volume is 1m 3 / h-10m 3 / h;

[0059] 3) Before the reaction, slowly pre-heat the high-temperature reaction equipment 3, and at the same time fill the gas seal device 31 with protective gas to ensure that the high-temperature area inside the equipment is in an oxygen-free state, and the ...

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 discloses a copper foil-graphene composite cathode current collector for a lithium battery and a preparation method thereof, belonging to the technical field of batteries. According to the preparation method, graphene directly grows on the surface of a copper foil in a coating manner by virtue of a chemical vapor deposition method so as to form a copper foil-graphene integrated composite material, the bonding strength between the current collector and an active matter is enhanced, the phenomena of the repeated expansion and the separation of the current collector are prevented, and the bonding between the current collector and the active matter is closer, so that the interface resistance is decreased, the rate discharge performance of a battery is improved, and the cycle uselife of the battery is prolonged. The preparation method has the beneficial effects that the bonding strength between the prepared copper foil-graphene composite cathode current collector and the active matter is high, the rate discharge performance of the battery is high, and the cycle use life of the battery is long.

Description

technical field [0001] The invention relates to the technical field of batteries, and specifically designs a copper foil-graphene composite negative electrode current collector for lithium batteries and a preparation method thereof. Background technique [0002] The current collector is one of the indispensable components of the lithium-ion battery. It not only needs to carry the active material, but also collects and outputs the current generated by the electrode active material. Therefore, a current collector with excellent performance is conducive to reducing the internal resistance of lithium-ion batteries, and improving the Coulombic efficiency, cycle stability, rate performance and battery charge / discharge efficiency of the battery. An ideal battery current collector should meet several conditions: high electrical conductivity and electrochemical stability, good compatibility with electrode active materials and high binding force, good mechanical strength of the materi...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/66H01M4/583H01M4/62C01B32/20
CPCH01M4/583H01M4/625H01M4/667Y02E60/10Y02P20/10
Inventor 王红飞张洪白彬张遂超朱忠洲李海龙
Owner 张洪
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