Inorganic-cellulose composite carbon aerogel and preparation method thereof

A technology of cellulose airgel and carbon airgel, which is applied in the direction of airgel preparation, carbon preparation/purification, chemical instruments and methods, etc., can solve the problems that cannot meet the needs of energy storage and conversion devices, few active sites, Poor mechanical properties and other problems, to achieve the effect of solvent green environmental protection, good conductivity and high safety

Inactive Publication Date: 2018-05-29
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of existing pure carbon airgel materials such as poor mechanical properties, poor adsorption, few active sites, and low energy density, and cannot meet the actual needs of energy storage and conversion devices

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
  • Inorganic-cellulose composite carbon aerogel and preparation method thereof
  • Inorganic-cellulose composite carbon aerogel and preparation method thereof
  • Inorganic-cellulose composite carbon aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of inorganic-cellulose composite carbon aerogel includes the following steps:

[0039] 1) Prepare a 0.01wt% sulfuric acid modified cellulose nanocrystal dispersion, and then use an ultrasonic pulverizer with a power of 300-1800W to perform ultrasonic treatment for 60 minutes to obtain a uniform dispersion;

[0040] 2) Put the dispersion obtained in step 1) into a dialysis bag with a molecular weight of 8000-14000, then soak the dialysis bag in tert-butanol and place it in tert-butanol for 24 hours, and use a magnetic stirrer for mechanical stirring , Until the volume of the remaining suspension is 1 / 3 of the original volume, collect the remaining suspension and put it in a bottle and freeze it in an ultra-low temperature refrigerator at -55℃ for 24h; then transfer to the conditions of a vacuum of 0.1μpa-100pa and -80℃ Dry for 72h; get sulfuric acid modified cellulose aerogel;

[0041] 3) Put the sulfuric acid-modified cellulose aerogel into a tube furnace...

Embodiment 2

[0047] A preparation method of inorganic-cellulose composite carbon aerogel includes the following steps:

[0048] 1) Prepare a 0.01wt% TEMPO modified cellulose nanocrystal dispersion, and then use an ultrasonic pulverizer with a power of 300-1800W to perform ultrasonic treatment for 60 minutes to obtain a uniform dispersion;

[0049] 2) Put the dispersion obtained in step 1) into a dialysis bag with a molecular weight of 8000-14000, then soak the dialysis bag in tert-butanol and place it in tert-butanol for 24 hours, and use a magnetic stirrer for mechanical stirring , Until the volume of the remaining suspension is 1 / 3 of the original volume, collect the remaining suspension and put it in a bottle and freeze it in an ultra-low temperature refrigerator at -55℃ for 24h; then transfer to the conditions of a vacuum of 0.1μpa-100pa and -80℃ Dry for 72h; get TEMPO modified cellulose aerogel;

[0050] 3) Put the TEMPO-modified cellulose aerogel into a tube furnace, and then heat the tube...

Embodiment 3

[0057] A preparation method of inorganic-cellulose composite carbon aerogel includes the following steps:

[0058] 1) Prepare a 0.01wt% hydrochloric acid modified cellulose nanocrystal dispersion, and then use an ultrasonic pulverizer with a power of 300-1800W to perform ultrasonic treatment for 60 minutes to obtain a uniform dispersion;

[0059] 2) Put the dispersion obtained in step 1) into a dialysis bag with a molecular weight of 8000-14000, then soak the dialysis bag in tert-butanol and place it in tert-butanol for 24 hours, and use a magnetic stirrer for mechanical stirring , Until the volume of the remaining suspension is 1 / 3 of the original volume, collect the remaining suspension and put it in a bottle and freeze it in an ultra-low temperature refrigerator at -55℃ for 24h; then transfer to the conditions of a vacuum of 0.1μpa-100pa and -80℃ Dry for 72h; get hydrochloric acid modified cellulose aerogel

[0060] 3) Put the hydrochloric acid-modified cellulose aerogel into a t...

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
massaaaaaaaaaa
Login to view more

Abstract

The invention discloses inorganic-cellulose composite carbon aerogel and a preparation method thereof. The inorganic-cellulose composite carbon aerogel is prepared by carbonizing modified cellulose aerogel in the presence of an inert gas, and by implementing a hydrothermal synthesis method with a mixed liquid with transition metals. The inorganic-cellulose composite carbon aerogel disclosed by theinvention has the characteristics of no toxicity, a 3D network structure, a high specific surface area, rich porosity, rich reaction sites, good conductivity, and the like, in addition has certain mechanical strength, and can be applied to fields such as electrode materials for energy storage, electric catalysts, photocatalyst, multi-phase catalysts, adsorption and water treatment.

Description

Technical field [0001] The invention relates to a composite carbon aerogel, in particular to an inorganic-cellulose composite carbon aerogel and a preparation method thereof. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage element between traditional capacitors and batteries, with high energy density, power density and good cycle life. As a new type of nanoporous material, carbon aerogel has the advantages of high specific surface area, high mesopore content, high conductivity, stable physical and chemical properties, etc. It is an ideal material for preparing supercapacitors. However, pure carbon aerogel materials have low chemical activity, small specific capacitance, relatively poor adsorption performance, and poor catalytic performance, which hinder their wider application. [0003] MoS 2 The ionic conductivity is higher than that of metal oxides, and the specific capacity is higher than that of graphite...

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): C01B32/05B01J13/00
CPCB01J13/0091
Inventor 卢芸孔雪琳刘波殷亚方
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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