Lithium battery positive electrode current collector, preparation method thereof, lithium battery and positive electrode thereof

A technology for positive electrode current collectors and lithium batteries, applied in the direction of electrode carriers/current collectors, battery electrodes, non-aqueous electrolyte battery electrodes, etc., can solve the problem of affecting the interface contact performance between the positive electrode and the electrolyte layer, the peeling off of the positive electrode active material, and the cycle life of the battery Decrease and other problems, to reduce the risk of thermal runaway, reduce quality, reduce the effect of specific gravity

Active Publication Date: 2021-10-08
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
View PDF12 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of charging and discharging, the positive electrode active material will produce a certain volume deformation, and the volume deformation will lead to the generation of stress, which will cause the peeling off of the positive electrode active material, resulting in a decrease in the cycle life of the battery.
The expansion and contraction of the positive electrode will affect the interfacial contact performance between t

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
  • Lithium battery positive electrode current collector, preparation method thereof, lithium battery and positive electrode thereof
  • Lithium battery positive electrode current collector, preparation method thereof, lithium battery and positive electrode thereof
  • Lithium battery positive electrode current collector, preparation method thereof, lithium battery and positive electrode thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0041] Example 1, a lithium battery positive electrode fluid comprising a polyethylene film (polymer film), both side of the polymer film, both side of the polymer film, both ends of the aluminum metal region along the width direction of the polymer film Set, and the aluminum metal region is provided in a plurality of orientation in the longitudinal direction of the polymer film; both the aluminum metal regions are provided, and the area of ​​the aluminum metal layer is 50% of the polymer film area; and the positive electrode fluid is as follows. Work preparation:

[0042] According to the shape of the aluminum metal region, the release paper film is cut, covering the surface of the polyethylene film, and the exposed portion is consistent with the shape of the aluminum metal region to obtain a semi-finished film; then semi-finished film is placed in a vacuum magnetron sputtering device, aluminum As a target, aluminum is achieved on double-sided deposition of semi-finished membrane...

Example Embodiment

[0044] Example 2, a lithium battery positive electrode current collector, the difference from Example 1 is that the area of ​​the aluminum metal layer is 60% of the polymer film area.

Example Embodiment

[0045] Example 3, a lithium battery positive electrode current collector, the difference from Example 1 is that the area of ​​the aluminum metal layer is 40% of the polymer film area.

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to the field of lithium batteries, in particular to a lithium battery positive electrode current collector, a preparation method thereof, a lithium battery and a positive electrode thereof. The positive electrode current collector comprises a polymer film, aluminum metal areas are arranged on the side faces of the two sides of the polymer film, aluminum metal layers are arranged on the aluminum metal areas, and the area of the aluminum metal layers is 40-70% of the area of the polymer film. The lithium battery provided by the invention adopts the positive electrode current collector, so that the energy density of the lithium metal battery is improved, the stripping and falling probability of the positive electrode active material is also reduced in the charging and discharging processes of the battery, the cycle life of the battery is further prolonged, in addition, the condition of micro short circuit of the lithium battery is further reduced, and the safety performance of the lithium battery is improved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a lithium battery cathode current collector and a preparation method thereof, and a lithium battery and the cathode thereof. Background technique [0002] Lithium batteries are generally divided into lithium ion batteries and lithium metal batteries, and their components include a positive electrode, a negative electrode, and a current collector corresponding to the positive electrode and the negative electrode. The working principle of a lithium battery is to charge and discharge the battery by intercalating and deintercalating lithium ions back and forth between the positive and negative electrodes. Since the active materials used in the positive and negative electrodes of the battery have poor conductivity, it is necessary to install a current collector on the electrodes to collect the current generated by the active materials and improve the conductivity of the electrodes. ...

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): H01M4/66H01M4/13H01M4/139H01M10/0525
CPCH01M4/13H01M4/139H01M4/661H01M4/667H01M4/668H01M10/0525H01M2004/028Y02P70/50
Inventor 许晓雄崔言明秦晨阳詹盼
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap