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

Preparation method of sulfur/carbon aerogel composite material

A technology of carbon airgel and composite materials, applied in the field of materials, can solve problems such as excessively large and uneven pore size, cumbersome preparation of carbon-based materials, preparation of S/C composite materials and performance impact, etc., to achieve easy control and maintain circulation Stability, the effect of inhibiting the shuttle effect

Pending Publication Date: 2020-12-29
WUHAN UNIV OF TECH
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the cumbersome preparation of carbon-based materials and the large and uneven pore size, the preparation and performance of S / C composites will be affected.

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 sulfur/carbon aerogel composite material
  • Preparation method of sulfur/carbon aerogel composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of S / C airgel composite material preparation method, its steps are as follows:

[0033] 1) Preparation of OCNF dispersion: Take 2g dry weight of cellulose, 0.1g TEMPO, 0.5g NaBr, add 500ml deionized water, magnetically stir to dissolve, then add 2g NaClO, under 1M NaOH titration conditions, maintain the pH at 9.5 , after reacting for 3h, add 2g NaBH to the solution 4 Reduction, after reaction for 4 hours, filter with suction, wash with deionized water until neutral, add deionized water to disperse after drying, mechanically stir and homogenize under high pressure to obtain a 1wt% OCNF dispersion.

[0034] 2) Preparation of OCNF airgel: Centrifuge the above OCNF dispersion at 10,000rpm to remove air bubbles, take 20ml and pour it into a small beaker, then place it in 10ml of 8M HCl solution, and leave it sealed for 24 hours to obtain OCNF hydrogel , respectively replaced with 200ml of ethanol and tert-butanol three times, and freeze-dried at -45°C to obtain OCNF ...

Embodiment 2

[0040] A kind of S / C airgel composite material preparation method, its steps are as follows:

[0041] 1) Preparation of OCNF dispersion: Take 2 g of cellulose with a dry weight, 0.05 g TEMPO, and 0.25 g NaBr, add 500 ml of deionized water, stir to dissolve, then add 1 g of NaClO, and maintain a pH of 9.5 under 1M NaOH titration conditions. After reacting for 3h, add 2g NaBH to the solution 4 Reduction, after reaction for 4 hours, filter with suction, wash with deionized water until neutral, add deionized water to disperse after drying, mechanically stir and homogenize under high pressure to obtain a 1wt% OCNF dispersion.

[0042] 2) Preparation of OCNF airgel: Centrifuge the above OCNF dispersion at 10,000rpm to remove air bubbles, then take 20ml and pour it into a small beaker, then place it in 10ml of 8M HCl solution, and leave it sealed for 24 hours to obtain OCNF hydrogel , respectively replaced with 200ml of ethanol and tert-butanol three times, and freeze-dried at -45°C...

Embodiment 3

[0046] A kind of S / C airgel composite material preparation method, its steps are as follows:

[0047] 1) Preparation of OCNF dispersion: Take 2 g of cellulose with a dry weight, 0.2 g TEMPO, and 1 g NaBr, add 500 ml of deionized water, stir to dissolve, then add 4 g of NaClO, and maintain a pH of 9.5 under 1M NaOH titration conditions. After reacting for 3h, add 2g NaBH to the solution 4 Reduction, after reaction for 4 hours, filter with suction, wash with deionized water until neutral, add deionized water to disperse after drying, mechanically stir and homogenize under high pressure to obtain a 1wt% OCNF dispersion.

[0048] 2) Preparation of OCNF airgel: Centrifuge the above OCNF dispersion at 10,000rpm to remove air bubbles, then take 20ml and pour it into a small beaker, then place it in 10ml of 8M HCl solution, and leave it sealed for 24 hours to obtain OCNF hydrogel , respectively replaced with 200ml of ethanol and tert-butanol three times, and freeze-dried at -45°C to ...

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
Login to View More

Abstract

The invention discloses a preparation method of a sulfur / carbon aerogel composite material. The preparation method comprises the following steps: firstly, preparing OCNF dispersion liquid; putting theOCNF dispersion liquid into a hydrochloric acid atmosphere, standing for 6-36 hours under a closed condition, then taking out the gel, and carrying out organic solvent replacement and freeze drying to obtain OCNF aerogel; carrying out carbonizing under an Ar condition to obtain carbon aerogel; and fully grinding and mixing sublimed sulfur and the carbon aerogel, carrying out pretreating at 120-200 DEG C under the Ar condition to make the sublimed sulfur melt and fully contact with carbon fibers, heating to 250-400 DEG C to sublimate the sulfur, and naturally cooling to condense and adsorb sulfur steam on the carbon fibers, thereby obtaining the S / C aerogel composite material. The invention provides a preparation method of a novel porous carbon fiber loaded elemental sulfur positive electrode material. The obtained sulfur / carbon aerogel composite material has high specific capacity and good cycling stability.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a sulfur / carbon airgel composite material. Background technique [0002] Demand for energy storage technology continues to grow due to its future applications in electric vehicles and smart grids. Lithium-ion batteries (LIBs) based on intercalation mechanisms have the highest energy densities among commercially viable energy storage technologies, but are approaching the limits of theoretical energy densities. Therefore, it is urgent to research and develop high-energy-density and cost-effective batteries to replace the existing lithium-ion batteries. Among all kinds of batteries, lithium-sulfur (Li-S) battery is due to its high theoretical energy (2600W hkg -1 ), high specific capacity (1675mA hg -1 ) has attracted much attention from academia and the global energy storage market. In addition, sulfur also has obvious advantages such as co...

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
IPC IPC(8): C01B32/05C01B17/02H01M4/36H01M4/38H01M4/62H01M10/052
CPCC01B32/05C01B17/0243H01M4/366H01M4/38H01M4/625H01M4/628H01M10/052H01M2004/021H01M2004/028Y02E60/10
Inventor 杨全岭陈吉思石竹群刘妍熊传溪胡洋
Owner WUHAN 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