Preparation method of a modified copper three-dimensional framework and its application in lithium batteries

A three-dimensional skeleton and lithium battery technology, which is applied in lithium batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of low coulombic efficiency of lithium metal negative electrodes, achieve performance improvement, alleviate dead lithium, and achieve high coulombic efficiency effects

Active Publication Date: 2021-08-06
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention lies in the deposition of lithium on the three-dimensional conductive framework in the existing lithium metal negative electrode, which makes the coulombic efficiency of the lithium metal negative electrode lower, thereby providing a method for preparing a modified copper three-dimensional framework and its use in lithium metal. Application in battery

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 a modified copper three-dimensional framework and its application in lithium batteries
  • Preparation method of a modified copper three-dimensional framework and its application in lithium batteries
  • Preparation method of a modified copper three-dimensional framework and its application in lithium batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a method for preparing a modified copper three-dimensional skeleton, the specific steps are as follows:

[0049] (1) Dissolve 2.8 grams of sodium hydroxide and 2.28 grams of ammonium persulfate in 80 milliliters of water as reaction solution A; mix 2.5 milliliters of water and 2.5 milliliters of dimethylformamide, and then take 10 milligrams of 1,3,5-homon Benzenetricarboxylic acid and 100 mg of polyvinylpyrrolidone were dissolved therein as reaction solution B;

[0050] (2) Immerse the cleaned copper foam (2cm×5cm×1cm) in reaction solution A and let it stand at 4°C for 22 minutes; then transfer it directly to reaction solution 2 and let it stand at 25°C for 10 minutes. After the reaction is completed, wash with water and alcohol and dry;

[0051] (3) Keep the dried copper foam in an argon atmosphere at 400° C. for 1 hour to obtain a modified copper three-dimensional framework.

[0052] The modified copper three-dimensional skeleton is tested ...

Embodiment 2

[0054] This embodiment provides a method for preparing a modified copper three-dimensional skeleton, the specific steps are as follows:

[0055] (1) Dissolve 3.2 grams of sodium hydroxide and 9.12 grams of ammonium persulfate in 80 milliliters of water as reaction solution A; mix 1 milliliter of water with 5 milliliters of dimethylformamide, and then take 25 milligrams of 1,3,5- Trimellitic acid and 6 mg of polyvinylpyrrolidone were dissolved therein as reaction solution B;

[0056] (2) Dip the cleaned copper grid (2cm×5cm×1cm) into reaction solution A and let it stand at 4°C for 22 minutes; then transfer it directly to reaction solution 2 and let it stand at 25°C for 10 minutes. After the reaction is completed, wash with water and alcohol and dry;

[0057] (3) Keep the dried copper grid in an argon atmosphere at 300° C. for 2 hours to obtain a modified copper three-dimensional skeleton.

Embodiment 3

[0059] This embodiment provides a method for preparing a modified copper three-dimensional skeleton, the specific steps are as follows:

[0060] (1) Dissolve 0.32 g of sodium hydroxide and 0.18 g of ammonium persulfate in 80 ml of water as reaction solution A; mix 5 ml of water with 1 ml of dimethylformamide, and then take 1.2 mg of 1,3,5- Trimellitic acid and 600 mg of polyvinylpyrrolidone were dissolved therein as reaction solution B as reaction solution B;

[0061] (2) Immerse the cleaned carbon conductive substrate (2cm × 5cm × 1cm, the thickness of the copper layer is 100μm) coated with copper in the reaction solution A, and let it stand at 4°C for 22 minutes; then directly transfer to the reaction solution In solution 2, let stand at 25°C for 10 minutes. After the reaction is completed, wash with water and alcohol and dry;

[0062] (3) Keep the dried carbon conductive substrate coated with copper on the other surface in an argon atmosphere at 500° C. for 1 hour to obta...

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
particle diameteraaaaaaaaaa
current efficiencyaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for preparing a modified copper three-dimensional skeleton, which comprises the steps of successively placing the copper three-dimensional skeleton in two kinds of reaction solutions, washing and drying, and performing high-temperature treatment under an inert atmosphere. The invention also discloses a lithium battery negative electrode and a lithium battery using the modified copper three-dimensional skeleton as a material. In the present invention, the most commonly used Cu current collector is used as the three-dimensional copper framework, but it is modified. The material structure is simple, and too many inactive substances are not introduced, and the performance of the three-dimensional copper framework is improved; In the negative electrode of the battery, it can realize the uniform deposition of lithium, eliminate the growth of lithium dendrites, and alleviate the generation of "dead lithium". It has a high Coulombic efficiency during the cycle and the cycle life is significantly extended; at the same time, it can be applied to various battery systems , has good compatibility and electrochemical performance; at the same time, the invention has simple preparation process, low cost and easy large-scale production.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a method for preparing a modified copper three-dimensional skeleton and its application in lithium batteries. Background technique [0002] With the rapid development of portable electronic devices and electric vehicles, the energy density requirements of battery devices in related fields are also getting higher and higher. However, as lithium-ion battery technology becomes more and more mature, the actual capacity is getting closer and closer to the theoretical capacity, and it is difficult to make a major breakthrough in the energy density of lithium-ion batteries. Therefore, it is difficult for lithium-ion batteries to meet the increasing requirements in practical applications. . Lithium metal batteries have gradually attracted everyone's attention, because metal lithium is used as the negative electrode, which has a high theoretical specific capacity (3860mAh g -1 ) and the...

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 Patents(China)
IPC IPC(8): C23C22/63C23C22/74H01M4/134H01M4/62H01M10/052
CPCC23C22/63C23C22/74H01M4/134H01M4/626H01M10/052Y02E60/10
Inventor 陈人杰钱骥李雨吴锋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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