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

Preparation method of monatomic copper catalyst and application of monatomic copper catalyst in positive electrode of lithium-sulfur battery

A copper catalyst and atomic technology, which is applied in the preparation of single-atom copper catalysts and the application field in the cathode of lithium-sulfur batteries, can solve the problems of low utilization rate of catalysts, and achieve cheap source of raw materials, high sulfur loading, high capacity and cycle. performance effect

Active Publication Date: 2020-11-24
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF11 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the adsorption and catalysis process mainly occurs on the surface of catalyst particles, the surface atoms of nanoscale particles only account for a small part of the total number of atoms, resulting in low catalyst utilization.

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 monatomic copper catalyst and application of monatomic copper catalyst in positive electrode of lithium-sulfur battery
  • Preparation method of monatomic copper catalyst and application of monatomic copper catalyst in positive electrode of lithium-sulfur battery
  • Preparation method of monatomic copper catalyst and application of monatomic copper catalyst in positive electrode of lithium-sulfur battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1 is the preparation of SA-Cu / NCNF and its application in lithium-sulfur battery cathode. The natural cotton is washed successively with 10% dilute hydrochloric acid, distilled water and ethanol, and the washed cotton is dried in an oven at 60°C for 24 hours. Such as image 3 As shown in (a), the dried cotton and copper foam are put into the tube furnace together. Such as image 3 As shown in (c), under argon atmosphere, keep warm at 25°C for 30 minutes, raise the temperature to 1000°C at a rate of 5°C / min, keep warm for 2 hours, switch to ammonia atmosphere, keep warm for 1 hour, and then heat it under argon atmosphere. The furnace was cooled to room temperature, and the SA-Cu / NCNF foam was obtained. Such as Figure 6 As shown, no obvious particles were observed locally in the carbon fiber, but the X-ray energy scattering spectrum showed uniformly dispersed copper signals, and copper was uniformly dispersed in the nitrogen-doped carbon fiber matrix in the f...

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
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a monatomic copper catalyst and an application of the monatomic copper catalyst in a positive electrode of a lithium-sulfur battery, and belongs to thetechnical field of battery materials. Copper atoms on foamy copper are captured and migrated to a carbon fiber matrix through high-temperature ammonia gas treatment, and nitrogen-doped carbon fiber foam material loaded with monatomic copper is prepared and serves as a carrier material of positive electrode sulfur in the lithium-sulfur battery. According to the monatomic copper catalyst prepared bythe preparation method, the lithium-sulfur battery has relatively high reaction kinetics, excellent capacity exertion and cycling stability under high sulfur loading capacity. The preparation methodis simple in process flow, and provides a wide prospect for the application of the monatomic catalyst in the lithium-sulfur battery.

Description

Technical field: [0001] The invention relates to the technical field of battery materials, in particular to a preparation method of a single-atom copper catalyst and its application in a positive electrode of a lithium-sulfur battery. Background technique: [0002] Sulfur has the characteristics of abundant natural reserves, environmental friendliness, and high theoretical capacity (1675mAh / g), and is an ideal battery cathode material. Lithium-sulfur batteries have a high theoretical energy density (2600Wh / kg), which can meet the energy density requirements of future energy storage devices. However, sulfur still faces great challenges as a cathode material. Sulfur and discharge product Li 2 S / Li 2 S 2 It is an electronic insulator, which leads to incomplete conversion of active substances in the electrochemical process and low utilization. In addition, the intermediate product lithium polysulfide (Li 2 S x , 3≤x≤8) can be dissolved in the electrolyte, and under the ac...

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): B01J27/24B01J35/06B01J37/02H01M4/13H01M10/052H01M10/42D01F9/16
CPCB01J27/24B01J37/0201B01J37/0213H01M10/4235H01M4/13H01M10/052D01F9/16H01M2004/028B01J35/58B01J35/33Y02E60/10
Inventor 孙振华肖茹陈克杨珍珍李峰成会明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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