Preparation process of metal lithium negative electrode with surface protection layer

A preparation process, metal lithium technology, applied in the direction of negative electrode, electrode manufacturing, lithium battery, etc., can solve the problems of low ionic conductivity of pure polymer protective layer, reduce battery cycle performance, reduce battery rate performance, etc., to improve battery performance. Rate performance, avoiding thermal runaway, and inhibiting the growth of lithium dendrites

Active Publication Date: 2020-05-19
TIANQI LITHIUM CORP
View PDF22 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing problems are: the inorganic fillers that do not contain lithium in the surface protective layer materials currently used rely on their high mechanical strength to suppress lithium dendrites; pure ceramic solid electrolytes have high ion conductivity and high mechanical strength, but It has poor contact with the metal lithiu

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0036] Embodiment: The following will be described in detail to clearly illustrate this case. After any person skilled in the art understands the embodiment of this case, he can change and modify the technology taught in this case without departing from the spirit and scope of this case.

[0037] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present case.

[0038] As used herein, "comprising", "comprising", "having" and the like are all open terms, meaning including but not limited to.

[0039] A preparation process of a metal lithium negative electrode with a surface protection layer, comprising:

[0040]Step 1, dissolving lithium salt or / and inorganic solid electrolyte and a polymer in the polyimide solution, and mixing them uniformly to obtain a polyimide mixed solution.

[0041] Wherein, the lithium salt is selected from LiTFSI or LiBOB or LiClO 4 Or, described lithium salt selects LiTF...

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 relates to a preparation process of a metal lithium negative electrode with a surface protection layer. The preparation process comprises the following steps: 1, dissolving a lithium salt or/and an inorganic solid electrolyte and a polymer and mixing in a polyimide solution to obtain a polyimide mixed solution; 2, coating the surface of one side of a metal lithium foil with the mixedsolution, wherein the coating thickness is 1-150 microns; and 3, drying the surface of the metal lithium foil coated with the mixed solution to form a polymer network for coating the inorganic fillerso as to form a surface protection layer on the surface of the metal lithium foil in situ. The invention aims to inhibit the growth of the metal lithium negative electrode in a battery, and through the polyimide protection layer with high mechanical strength, the metal lithium makes close contact with the protection layer by using an in-situ growth method, so that the interface impedance is reduced, and the coulombic efficiency of the battery is improved; and the ionic conductivity of the protection layer is improved by adding the lithium salt/solid electrolyte, and the rate capability is improved.

Description

technical field [0001] The invention relates to the technical field of energy storage batteries, in particular to a preparation process of a metal lithium negative electrode with a surface protection layer applied in batteries. Background technique [0002] Under the background of increasingly tense energy sources, countries all over the world are focusing on the research of green and environmentally friendly new energy sources. At the same time, people's demand for batteries for electronic products is also developing in the direction of high energy density and high safety. Lithium secondary batteries have attracted extensive attention from researchers in the industry because of their high specific energy, environmental protection and pollution-free. The secondary battery with metal lithium as the negative electrode has a high theoretical specific capacity and low electrode potential, so it has become a research direction to greatly increase the capacity of the secondary bat...

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): H01M4/1395H01M4/62H01M4/04H01M10/052
CPCH01M4/1395H01M4/624H01M4/0407H01M10/052H01M2004/027Y02E60/10
Inventor 邹崴周复罗从山刘强赵木孔文晓王凯萱
Owner TIANQI LITHIUM CORP
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