Preparation method of lithium metal negative electrode based on lithium-philic three-dimensional carbon-based current collector

A lithium metal negative electrode and current collector technology, which is applied in the lithium metal battery negative electrode and its preparation field based on lithium-philic three-dimensional carbon-based current collectors, can solve the problems of poor lithium-philicity and the inability of metal lithium to infiltrate the skeleton, and achieve high lithium content The effect of inhibiting the growth of lithium dendrites and alleviating the volume expansion effect

Active Publication Date: 2021-05-04
BEIHANG UNIV
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most carbon-based current collectors have poor lithium affinity, and metal lithium cannot infiltrate the framework quickly and uniformly.

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
  • Preparation method of lithium metal negative electrode based on lithium-philic three-dimensional carbon-based current collector
  • Preparation method of lithium metal negative electrode based on lithium-philic three-dimensional carbon-based current collector
  • Preparation method of lithium metal negative electrode based on lithium-philic three-dimensional carbon-based current collector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Preparation of three-dimensional precursor framework materials

[0027] Through the TEMPO oxidation method, prepare a well-dispersed bacterial cellulose aqueous solution with a concentration of 2mg / ml; add 50ml of bacterial cellulose aqueous solution, 0.55g of resorcinol, and 0.75ml of formaldehyde into a beaker, stir evenly, and put the mixed solution into into the reaction kettle, heated at 100 degrees Celsius for 10 hours, and the precursor skeleton material obtained after freeze-drying;

[0028] 2) Preparation of lithium-philic three-dimensional carbon-based current collectors

[0029] Put the precursor skeleton material into a tube furnace, pass through nitrogen protective gas, and carry out high-temperature carbonization at a constant temperature of 800°C for 2 hours to obtain a lithium-friendly three-dimensional carbon-based current collector;

[0030] 3) Preparation of composite lithium metal anode

[0031] Put the lithium-friendly three-dimensional carbon-...

Embodiment 2

[0034] 1) Preparation of three-dimensional precursor framework materials

[0035] Add 50ml of carbon nanotube aqueous solution, 0.275g of resorcinol, and 0.375ml of formaldehyde into a beaker, stir evenly, put the mixed solution into the reaction kettle, heat at 100 degrees Celsius for 10 hours, and obtain the precursor skeleton material after freeze-drying ;

[0036] 2) Preparation of lithium-philic three-dimensional carbon-based current collectors

[0037] Put the precursor skeleton material into a tube furnace, pass through nitrogen protective gas, and carry out high-temperature carbonization at a constant temperature of 800°C for 2 hours to obtain a lithium-friendly three-dimensional carbon-based current collector;

[0038] 3) Preparation of composite lithium metal anode

[0039] Put the lithium-friendly three-dimensional carbon-based current collector into the molten metal lithium at 300°C in the glove box, and the liquid metal lithium can be poured into the current col...

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 belongs to the technical field of lithium metal batteries, and discloses a preparation method of a lithium metal negative electrode of a lithium-philic three-dimensional carbon-based current collector. The preparation method comprises the following steps of: firstly, self-assembling a one-dimensional nano material and an organic material to obtain a three-dimensional precursor framework material; secondly, carrying out high-temperature carbonization treatment on the three-dimensional precursor framework material to prepare the lithium-philic three-dimensional carbon-based current collector with good wettability on liquid metal lithium; and heating metal lithium to 180-500 DEG C to obtain liquid metal lithium, mixing the liquid metal lithium with the lithium-philic three-dimensional carbon-based current collector, and after the liquid metal lithium is fully infiltrated, naturally cooling the to prepare the composite lithium metal negative electrode. Compared with a lithium sheet negative electrode, the composite lithium metal negative electrode prepared by the invention can greatly inhibit the growth of lithium dendrites, alleviate the volume expansion effect of the lithium negative electrode in the deposition / stripping process, and realize long-life and high-stability circulation of lithium metal.

Description

technical field [0001] The invention belongs to the technical field of lithium metal batteries, in particular to a lithium metal battery negative electrode based on a lithium-friendly three-dimensional carbon-based current collector and a preparation method thereof. Background technique [0002] Due to its high theoretical capacity (3860mAh / g) and low electrochemical potential (-3.04V), lithium metal is considered to be the most promising anode material in high energy density storage systems, such as lithium-air batteries, lithium-sulfur batteries . However, the large-scale commercial application of lithium anodes has not been able to be applied so far, mainly for the following two reasons: the infinitely large relative volume leads to cracks in the solid electrolyte interface (SEI); Controlled growth leads to low Coulombic efficiency, poor cycle stability, and serious safety hazards. [0003] In order to solve these problems, researchers usually adopt three strategies to ...

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): H01M4/1395H01M4/78H01M4/66H01M4/38H01M10/052
CPCH01M4/1395H01M4/663H01M4/78H01M4/382H01M10/052H01M2004/027H01M2004/021Y02E60/10
Inventor 郉雅兰熊刚毅张世超
Owner BEIHANG UNIV
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