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

Flexible composite lithium metal electrode, preparation thereof and lithium metal battery

A metal electrode, composite lithium technology, applied in battery electrodes, secondary batteries, secondary battery repair/maintenance, etc., can solve the problems of limited application, unstable electrochemical performance, and unsatisfactory lithium dendrite growth effect, etc. achieve the effect of improving stability

Active Publication Date: 2021-03-12
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a flexible composite lithium metal electrode and a preparation method thereof and a lithium metal battery containing the flexible composite lithium metal electrode, to solve the problem that the existing metal lithium electrode is a rigid structure, and The effect of inhibiting the growth of lithium dendrites is not ideal, and there is a volume expansion phenomenon in the lithium metal exfoliation deposition, which leads to technical problems such as low safety performance, unstable electrochemical performance and limited application of lithium metal batteries

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
  • Flexible composite lithium metal electrode, preparation thereof and lithium metal battery
  • Flexible composite lithium metal electrode, preparation thereof and lithium metal battery
  • Flexible composite lithium metal electrode, preparation thereof and lithium metal battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] Correspondingly, the embodiment of the present invention also provides a preparation method of the flexible composite lithium metal electrode 01 above. The preparation method of the flexible composite lithium metal electrode 01 comprises the following steps:

[0062] S01: Provide a prestructure for flexible composite lithium metal electrodes;

[0063] S02: Pressing the pre-structure to form a flexible composite lithium metal electrode;

[0064] Wherein, the pre-structure in step S01 includes any structure in the following (1) to (4):

[0065] (1): comprising a non-lithophilic first conductive fiber layer and a lithium-based film layer attached to a surface of the first conductive fiber layer, that is, as figure 1 The prestructure of the flexible composite lithium metal electrode 01 shown;

[0066] (2): including a non-lithophilic first porous polymer film layer, a non-lithophilic first conductive fiber layer and a lithium-based film layer, along the direction from th...

Embodiment 11

[0087] This embodiment provides a flexible composite lithium metal electrode and a preparation method thereof. The structure of the flexible composite lithium metal electrode is a sandwich structure of polyvinylidene fluoride-hexafluoropropylene copolymer porous membrane / copper-coated carbon felt / lithium-magnesium alloy layer; wherein, the polyvinylidene fluoride-hexafluoropropylene copolymer porous membrane contains mass Lithium nitrate and polyvinylidene fluoride-hexafluoropropylene copolymer at a ratio of 1:1; the lithium content of the lithium-magnesium alloy layer is 90wt%, and " / " means lamination and combination.

[0088] The preparation method of flexible composite lithium metal electrode includes as follows:

[0089] S1: Take an acetone solution containing 5wt% lithium nitrate and 5wt% polyvinylidene fluoride-hexafluoropropylene copolymer, scrape-coat it on a flat aluminum-plastic film, control the scrape-coating distance to 200 μm, put it in the fume hood after scrap...

Embodiment 12

[0093] This embodiment provides a flexible composite lithium metal electrode and a preparation method thereof. The structure of the flexible composite lithium metal electrode is a sandwich structure of polyvinylidene fluoride-hexafluoropropylene copolymer porous membrane / nickel-plated carbon felt / lithium-magnesium alloy layer; wherein, the polyvinylidene fluoride-hexafluoropropylene copolymer porous membrane contains mass Lithium nitrate and polyvinylidene fluoride-hexafluoropropylene copolymer at a ratio of 8:5; the lithium content of the lithium-magnesium alloy layer is 75wt%, and " / " means lamination and combination.

[0094] The preparation method of flexible composite lithium metal electrode includes as follows:

[0095] S1: Take an acetone solution containing 8wt% lithium nitrate and 5wt% polyvinylidene fluoride-hexafluoropropylene copolymer, scrape-coat it on a flat aluminum-plastic film, control the scrape-coating distance to 200 μm, put it in the fume hood after scrap...

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 discloses a flexible composite lithium metal electrode, a preparation method thereof and a lithium metal battery. The flexible composite lithium metal electrode comprises a flexible substrate, the flexible substrate comprises a non-lithium-philic first conductive fiber layer, the first conductive fiber layer is provided with two opposite surfaces, and a lithium-based film layer is laminated and combined on one surface of the first conductive fiber layer; or, the flexible substrate comprises the non-lithium-philic first conductive fiber layer, a non-lithium-philic second conductive fiber layer and the lithium-based film layer, the first conductive fiber layer and the second conductive fiber layer are each provided with two opposite surfaces, and along the direction from the first conductive fiber layer to the second conductive fiber layer, the first conductive fiber layer, the lithium-based film layer and the second conductive fiber layer are sequentially laminated and combined to form a sandwich structure. The negative electrode of the lithium metal battery is the flexible composite lithium metal electrode.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a flexible composite lithium metal electrode, its preparation and a lithium metal battery. Background technique [0002] As people's awareness of environmental protection and energy crisis increases, lithium-ion batteries are becoming more and more popular as a green and environmentally friendly energy storage technology. Lithium-ion batteries have been widely utilized due to their high energy density, long cycle life, and high stability. With the widespread application of electronic products and the vigorous development of electric vehicles, the market for lithium-ion batteries has become increasingly broad, but at the same time higher requirements have been put forward for the safety of lithium-ion batteries. [0003] At present, commercial lithium-ion batteries mainly use carbon-based materials such as graphite as negative electrodes, and their limit...

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): H01M4/36H01M4/485H01M4/60H01M10/0525H01M10/42
CPCH01M4/362H01M4/366H01M4/602H01M4/485H01M10/0525H01M10/4235Y02E60/10
Inventor 邓永红罗超常建张田文书静
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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