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

A kind of mxene/sodium alginate derived carbon three-dimensional airgel and its preparation method and application

A sodium alginate and aerogel technology, applied in the field of aerogel, can solve the problem of inability to form three-dimensional gel materials, and achieve the effects of promoting diffusion and electron transport, promoting exposure, and improving electrochemical performance.

Active Publication Date: 2021-09-28
BEIJING UNIV OF CHEM TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, unlike graphene oxide materials, MXene materials themselves cannot form three-dimensional gel materials by hydrothermal or freeze-drying.

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
  • A kind of mxene/sodium alginate derived carbon three-dimensional airgel and its preparation method and application
  • A kind of mxene/sodium alginate derived carbon three-dimensional airgel and its preparation method and application
  • A kind of mxene/sodium alginate derived carbon three-dimensional airgel and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Weigh 100mg of sodium alginate powder in 20ml of deionized water and stir at 50°C for 2h to obtain a concentration of 5mgml -1 aqueous sodium alginate solution. Weigh 100mg of calcium chloride in 50ml of deionized water and stir for 10min to obtain a concentration of 2mgml -1 aqueous calcium chloride solution.

[0033] (2) Measure 38.5ml Ti 3 C 2 T x MXene dispersion (2.6mg ml -1 ), adding 10 ml of sodium alginate aqueous solution (50 mg), and stirring for 1 h to obtain a mixed solution of MXene / sodium alginate. Add 12.5ml calcium chloride solution (25mg), let stand for 10min, carry out freeze-drying subsequently, obtain MXene / sodium alginate hydrogel (mass ratio, MXene:sodium alginate=2:1; Sodium alginate:calcium chloride =2:1).

[0034] (3) Put Ti 3 C 2 T x / Sodium alginate hydrogel was treated at 500 ° high temperature for 2 h under argon atmosphere. Then the product was soaked in 1 mol / L hydrochloric acid solution for 1 h, washed with deionized wate...

Embodiment 2

[0041] Other conditions were the same as in Example 1, except that 2 ml of sodium alginate aqueous solution (10 mg) was added, and after stirring for 1 h, a mixed solution of MXene / sodium alginate was obtained. 5ml of calcium chloride solution (10mg) was added, allowed to stand for 10min, and then freeze-dried to obtain MXene / sodium alginate hydrogel. (mass ratio, MXene: sodium alginate=10:1; sodium alginate: calcium chloride=1:1). Nitrogen adsorption / desorption test results show that the specific surface area of ​​the MXene / sodium alginate carbon three-dimensional airgel reaches 156 m 2 / g, the pore volume is 3.8cm 3 / g, the pore size is 50nm. The morphology of MXene / sodium alginate derived carbon airgel materials was observed, as shown in image 3 shown. Even if the mass ratio of MXene to sodium alginate is as high as 10:1, the three-dimensional structure can still be maintained through sodium alginate gelation, which is beneficial to inhibit the stacking of MXene sheets...

Embodiment 3

[0045] Other conditions were the same as in Example 1, except that 1 ml of sodium alginate aqueous solution (5 mg) was added, and MXene / sodium alginate solution was obtained after stirring for 1 h. Add 2.5ml calcium chloride solution (5mg), leave standstill 10min, carry out freeze-drying subsequently, obtain MXene / sodium alginate hydrogel (mass ratio, MXene:sodium alginate=20:1; Sodium alginate:calcium chloride =1:1). Nitrogen adsorption / desorption test results show that the specific surface area of ​​the MXene / sodium alginate carbon three-dimensional airgel reaches 136m 2 / g, the pore volume is 3.4cm 3 / g, the pore size is 80nm. At a current density of 1 A / g, the MXene / sodium alginate-derived carbon airgel exhibited a specific capacitance of 371 F / g, and the capacity remained at 238 F / g at a current density of 50 A / g.

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
pore sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention provides an MXene / sodium alginate derived carbon three-dimensional airgel, a preparation method and application thereof. The preparation method of the MXene / sodium alginate derived carbon three-dimensional airgel provided by the present invention comprises the following steps: mixing the MXene dispersion liquid and the sodium alginate aqueous solution in liquid phase to obtain the MXene / sodium alginate mixed solution; Calcium chloride solution is added to the sodium alginate mixed solution, and the sodium alginate is gelled to obtain MXene / sodium alginate hydrogel; the sodium alginate is carbonized by high temperature treatment, and then 1‑3mol / L hydrochloric acid and deionized water are used After washing, the MXene / sodium alginate derived carbon three-dimensional airgel material is obtained. The MXene / sodium alginate derived carbon three-dimensional airgel material provided by the invention has better electrochemical performance when used in the field of supercapacitors.

Description

technical field [0001] The invention belongs to the field of airgel, and in particular relates to a MXene / sodium alginate derived carbon three-dimensional airgel and its preparation method and application. Background technique [0002] Transition metal carbide or nitride, also known as MXene, is a new two-dimensional material discovered for the first time in 2011. It has the characteristics of high electrical conductivity of graphene and hydrophilicity of graphene oxide, and has flexible and adjustable components. The advantages such as the controllable minimum nanometer layer thickness have shown great potential in the application of electrode materials for secondary batteries and supercapacitors. However, due to the relatively dense MXene sheets, the specific surface area is not high, and its mass specific capacity is low. [0003] In recent years, people have improved the transport of ions or electrons on the surface of MXene sheets by compounding with materials such as ...

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 Patents(China)
IPC IPC(8): C01B32/921C01B21/06C01B32/05H01G11/34H01G11/44B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B21/06C01P2004/03C01P2006/12C01P2006/14C01P2006/16C01P2006/40C01B32/05C01B32/921H01G11/34H01G11/44Y02E60/13
Inventor 徐斌张鹏
Owner BEIJING UNIV OF CHEM 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