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

Positive electrode material of lithium-sulfur battery composite electrode and preparation method and application of positive electrode material

A technology of positive electrode material and composite electrode, which is applied in the field of composite electrode positive electrode material and its preparation, can solve the problems of increasing battery impedance, process difficulties, etc., and achieves the improvement of wettability, strong chemical adsorption capacity, good cycle performance and rate performance. Effect

Pending Publication Date: 2022-03-04
中科南京绿色制造产业创新研究院
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, uniform deposition of SnO on the surface of bacterial progenitors 2 Nanoparticles are difficult to process and tend to increase the impedance of the 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
  • Positive electrode material of lithium-sulfur battery composite electrode and preparation method and application of positive electrode material
  • Positive electrode material of lithium-sulfur battery composite electrode and preparation method and application of positive electrode material
  • Positive electrode material of lithium-sulfur battery composite electrode and preparation method and application of positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] This embodiment provides a method for preparing a positive electrode material. The preparation method specifically includes the following steps:

[0066] (1) Prepare a mixed metal salt solution of 20 mmol / L, dissolve 0.1428 g of cobalt chloride hexahydrate and 0.162 g of ferric chloride hexahydrate in 30 mL of deionized water, stir at room temperature until the solution is clear, and obtain an orange-yellow solution;

[0067] (2) Cut the transfer filter paper with a thickness of 1cm into a size of 16×16cm, and soak it in the above-mentioned mixed solution for 2 hours;

[0068] (3) Place the transfer filter paper soaked in the metal salt solution obtained in step (2) in a blast drying oven at 60°C for 12 hours;

[0069] (4) High-temperature calcination, in an atmosphere with a volume ratio of argon and hydrogen of 9:1, first raise the temperature from 25°C to 300°C at a heating rate of 2°C / min, and keep it at 300°C for 1 hour; then heat it at 1°C The temperature was rai...

Embodiment 2

[0071] This embodiment provides a method for preparing a positive electrode material. The preparation method specifically includes the following steps:

[0072] (1) Prepare a mixed metal salt solution of 20 mmol / L, dissolve 0.1428 g of cobalt chloride hexahydrate and 0.162 g of ferric chloride hexahydrate in 30 mL of deionized water, stir at room temperature until the solution is clear, and obtain an orange-yellow solution;

[0073] (2) Cut the transfer filter paper with a thickness of 1cm into a size of 16×16cm, and soak it in the above-mentioned mixed solution for 2 hours;

[0074] (3) Place the transfer filter paper soaked in the metal salt solution obtained in step (2) in a blast drying oven at 55°C for 12 hours;

[0075] (4) High-temperature calcination, in an atmosphere with a volume ratio of argon and hydrogen of 9:1, the temperature is first raised from 30°C to 250°C at a heating rate of 1°C / min, and kept at 250°C for 1.5h; The temperature was raised from 250 °C to 75...

Embodiment 3

[0077] This embodiment provides a method for preparing a positive electrode material. The preparation method specifically includes the following steps:

[0078] (1) Prepare a mixed metal salt solution of 20 mmol / L, dissolve 0.1428 g of cobalt chloride hexahydrate and 0.162 g of ferric chloride hexahydrate in 30 mL of deionized water, stir at room temperature until the solution is clear, and obtain an orange-yellow solution;

[0079] (2) Cut the transfer filter paper with a thickness of 1cm into a size of 16×16cm, and soak it in the above-mentioned mixed solution for 2 hours;

[0080] (3) Place the transfer filter paper soaked in the metal salt solution obtained in step (2) in a blast drying oven at 62°C for 12 hours;

[0081] (4) High-temperature calcination, in an atmosphere with a volume ratio of argon to hydrogen of 8:1, first raise the temperature from 35°C to 350°C at a heating rate of 2°C / min, and keep it at 300°C for 2 hours; then heat it at 1.5°C The temperature was r...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a positive electrode material of a lithium-sulfur battery composite electrode as well as a preparation method and application of the positive electrode material. The positive electrode material comprises a three-dimensional carbon nanofiber substrate material, the three-dimensional carbon nanofiber substrate material is of a three-dimensional porous carbon net structure, adsorption points are arranged on the three-dimensional carbon nanofiber substrate material, and the adsorption points are used for adsorbing cobalt-iron alloy nanoparticles. The preparation method comprises the following steps: soaking raw materials of a three-dimensional carbon nanofiber substrate material in a metal mixed salt solution to obtain a precursor, and sequentially carrying out drying treatment and high-temperature reduction treatment on the precursor to obtain the positive electrode material. The porous structure of the carbon network is in effective contact with the soluble intermediate polysulfide, so that the utilization of sulfur is promoted, and the electrochemical kinetics of sulfur-containing species in the electro-catalysis process is accelerated. According to the preparation method, a simple impregnation-reduction method is adopted, the electronic structure of the monomer is optimized, and the catalytic activity is improved.

Description

technical field [0001] The invention relates to the field of lithium-sulfur batteries, and relates to a composite electrode cathode material and a preparation method and application thereof. Background technique [0002] Because of its ideal theoretical capacity (1675mAh g -1 ) and energy density (2600Wh kg -1 ), environmental protection and low cost are considered to be the most potential new generation of energy storage devices in the future. However, S 8 and Li 2 The poor electrical conductivity of S, large volume expansion (80%) during cycling, and the shuttling effect caused by the dissolution of polysulfides (LiPSs) lead to low active material utilization and fast capacity decay, limiting their high power output. In addition, the heterogeneous redox reaction on the sulfur cathode is usually accompanied by sluggish reaction kinetics during the charge / discharge process, which also makes the rate performance of Li-S batteries unsatisfactory. All of the above have hin...

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): H01M4/62H01M10/052C01B32/15
CPCH01M4/625H01M4/626H01M4/628H01M10/052C01B32/15H01M2004/021H01M2004/028Y02E60/10
Inventor 王宝高宁
Owner 中科南京绿色制造产业创新研究院
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