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

Lithium-sulfur battery composite anode material and preparation method and application thereof

A composite positive electrode material and a technology for positive electrode materials, applied in lithium-sulfur battery composite positive electrode materials and its preparation, and in the application field of lithium-sulfur batteries, can solve the problems of complex preparation process, difficult scale-up production, high cost of raw materials, etc., and achieve preparation The process is simple, the preparation process is easy to scale up, and the effect of high cycle capacity

Inactive Publication Date: 2016-08-03
HEFEI UNIV OF TECH
View PDF11 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of raw materials used in the preparation of this type of composite material is high, and the preparation process is complicated and difficult to scale up.

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
  • Lithium-sulfur battery composite anode material and preparation method and application thereof
  • Lithium-sulfur battery composite anode material and preparation method and application thereof
  • Lithium-sulfur battery composite anode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment prepares lithium-sulfur battery composite cathode material according to the following steps:

[0029] (1) Put 1 g of sodium alginate and 15 mg of Ketjen black (KB) into a ball mill jar, then add 1 mL of deionized water, and use a ball mill to mill for 2 hours (the speed of the ball mill is 1000 rpm), take it out, and dry to obtain the precursor;

[0030] (2) Place the precursor in an argon atmosphere, raise the temperature to 800°C, and then heat-preserve and anneal for 2 hours to carbonize the sodium alginate. After cooling to room temperature naturally, take it out, and it will be the conductive network-embedded hierarchical porous carbon carrier KBHPC;

[0031] (3) Put KBHPC and elemental sulfur in a ball mill with a mass ratio of 4:1 and mill them evenly; then raise the temperature to 155°C in an argon atmosphere and keep it warm for 12 hours, and take it out after the temperature drops to room temperature to obtain a lithium-sulfur battery Composite...

Embodiment 2

[0039] This embodiment prepares lithium-sulfur battery composite cathode material according to the following steps:

[0040](1) Put 1 g of sodium alginate and 10 mg of carbon nanotubes (CNTs) in a ball mill jar, then add 2 mL of deionized water, use a ball mill to mill for 3 hours (the speed of the ball mill is 1000 rpm), take it out, and dry it to obtain a precursor;

[0041] (2) Put the precursor in an argon atmosphere, raise the temperature to 800°C, and then heat-preserve and anneal for 2 hours to carbonize the sodium alginate, and take it out after cooling down to room temperature naturally, which is the conductive network-embedded hierarchical porous carbon carrier CNTHPC;

[0042] (3) Put CNTHPC and elemental sulfur in a ball milling tank at a mass ratio of 1:1 and mill them evenly; then raise the temperature to 180°C for 20 hours in an argon atmosphere, and take it out after the temperature drops to room temperature to obtain a lithium-sulfur battery composite Cathode ...

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
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium-sulfur battery composite anode material and a preparation method and application thereof. The lithium-sulfur battery composite anode material is characterized in that the anode material is formed by mixing and heating sulfur and a conductive network embedded graded porous carbon carrier, and sulfur is evenly dispersed in carbon pore channels of the conductive network embedded graded porous carbon carrier in the form of active nano particles and molecules. According to the conductive network embedded graded porous carbon carrier, porous carbon containing a three-level pore structure of micropores, mespores and macropores is adopted as a base body, and a high-conductivity nano carbon material is embedded into the base body to form a conductive network. The lithium-sulfur battery composite anode material can keep high circulating capacity, excellent stable circulation performance, good high-magnification (high-current-density charge and discharge) performance within a large temperature range including room temperature, the raw materials adopted in the material preparing process are cheap, available and environmentally friendly, the preparation process is simple, amplification is easy, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a lithium-sulfur battery composite cathode material, a preparation method thereof and an application in the lithium-sulfur battery. Background technique [0002] The development of efficient and stable secondary battery energy storage technology is an important means to deal with the increasingly urgent energy and environmental problems. The rapid development of high-end consumer electronics (such as smartphones, wearable devices, etc.) urgently requires secondary batteries with high specific energy. The lithium-sulfur battery is a secondary battery with sulfur as the positive electrode and lithium as the negative electrode. The theoretical specific capacity of the positive electrode sulfur is 1672mAhg -1 , the theoretical specific energy of the full battery is as high as 2600Whkg -1 , so it has great application prospects in the field of next-generation...

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): H01M4/36H01M4/38H01M4/583H01M4/62H01M10/052
CPCH01M4/364H01M4/38H01M4/583H01M4/625H01M10/052Y02E60/10
Inventor 辛森杜雪丽何建波
Owner HEFEI UNIV OF TECH
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