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

MXene nanosheet interlamellar spacing regulation method

A nanosheet and nanosheet technology, applied in the field of surface-modified MXene nanosheets, can solve the problems of hindering ion migration, low energy storage capacity, poor controllability, etc., and achieve the effect of simple operation, various types, and short reaction time

Inactive Publication Date: 2019-05-24
BEIJING UNIV OF CHEM TECH
View PDF8 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the too small gap between the nanosheets hinders ion migration, which eventually leads to a very low practical energy storage capacity.
Existing methods for adjusting the interlayer spacing of MXene nanosheets mainly use hybrid methods, in-situ growth methods, and self-assembly methods to combine organic polymers, metal oxides, and nanocarbon materials (carbon nanotubes, graphene, carbon black, etc.) ) to fill the gap between MXene nanosheets, not only the method is cumbersome and the controllability is poor, but also the advantages of high conductivity and hydrophilicity of MXene material itself are inhibited to varying degrees.

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
  • MXene nanosheet interlamellar spacing regulation method
  • MXene nanosheet interlamellar spacing regulation method
  • MXene nanosheet interlamellar spacing regulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1, preparation of MXene nanosheets:

[0025] Add 1g of LiF salt to 10ml of 3M hydrochloric acid solution and stir for 0.5h until completely dissolved, slowly add 1g of Ti to the above solution 3 AlC 2 powder. The etching is completed after constant temperature of 24 hours under the condition of 45° C. by water bath method. The etched solution is washed four times by centrifugation, filtration, and water addition, and the pH of the solution is about 6 after washing. After the washed solution was subjected to 3 repeated ultrasonic centrifugation treatments under the protection of argon, an MXene nanosheet solution with a concentration of about 3 mg / ml was obtained;

[0026] Step 2, regulating the layer spacing of MXene nanosheets:

[0027] Prepare the MXene solution prepared in step 1 to a solution with a concentration of 0.1mg / ml, take 20ml of the above solution, stir at a high speed under argon protection and 20°C, and then slowly add 10ml of 1-butane with a co...

Embodiment 2

[0030] Step 1, preparation of MXene nanosheets:

[0031] Add 1g of LiF salt to 10ml of 3M hydrochloric acid solution and stir for 0.5h until completely dissolved, slowly add 1g of Ti to the above solution 3 AlC 2 powder. The etching is completed after constant temperature of 24 hours under the condition of 45° C. by water bath method. The etched solution is washed four times by centrifugation, filtration, and water addition, and the pH of the solution is about 6 after washing. After the washed solution was subjected to 3 repeated ultrasonic centrifugation treatments under the protection of argon, an MXene nanosheet solution with a concentration of about 3 mg / ml was obtained;

[0032] Step 2, regulating the layer spacing of MXene nanosheets:

[0033] Prepare the MXene solution prepared in step 1 into a solution with a concentration of 0.1mg / ml, take 20ml of the above solution, stir at a high speed under argon protection and 20°C, and then slowly add 10ml of 1-butylene with ...

Embodiment 3

[0036] Step 1, preparation of MXene nanosheets:

[0037] Add 0.5g of LiF salt to 12M hydrochloric acid solution and stir for 3h until completely dissolved, slowly add 0.5g of Ti to the above solution 2 AlC powder. The etching is completed after constant temperature of 24 hours under the condition of 45° C. by water bath method. The etched solution is washed four times by centrifugation, filtration, and water addition, and the pH of the solution is about 6 after washing. After the washed solution was subjected to 3 repeated ultrasonic centrifugation treatments under the protection of argon, an MXene nanosheet solution with a concentration of about 3 mg / ml was obtained;

[0038] Step 2, regulating the layer spacing of MXene nanosheets:

[0039]Prepare the MXene solution prepared in step 1 into a solution with a concentration of 0.1mg / ml, take 20ml of the above solution, stir at a high speed under nitrogen protection and 40°C, and then slowly add 10ml of 1-ethyl with a concent...

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

No PUM Login to View More

Abstract

The invention provides an MXene nanosheet interlamellar spacing regulation method. The method includes that interlamellar spacing regulation is realized through MXene nanosheet surface modification with ionic liquid of imidazole salts, piperidine salts and pyridine salts. Organic positive ions in ionic liquid aqueous solution are combined with MXene nanosheets with electronegative surfaces throughthe Coulomb force to realize MXene material surface modification. After moisture removal, long-chain organic functional groups of MXene interlamellar organic positive ions play a role in supporting to prevent close stacking of the MXene nanosheets. More importantly, by changing of adding quantity of ionic liquid, the interlamellar spacing can be quantitatively adjusted in a range of 1.26-1.69nm.The regulated MXene nanosheets can serve as an electrode material to be applied to the field of energy storage of lithium ion batteries, sodium ion batteries, supercapacitors and the like and have excellent electrochemical performances and a promising application prospect.

Description

technical field [0001] The invention relates to a surface-modified MXene nanosheet technology, which belongs to the field of nanomaterial preparation. Background technique [0002] As a new type of transition metal carbide or nitride with two-dimensional structure, MXene has become an ideal electrode material due to its excellent electrical conductivity and hydrophilicity, and has attracted extensive attention. MXene with accordion-like structure and MXene nanosheets with two-dimensional structure can be obtained by direct etching with hydrofluoric acid or etching with mixed solution of LiF and hydrochloric acid, respectively. Among them, the two-dimensional structure MXene nanosheet solution can be prepared by vacuum filtration and other methods to prepare MXene flexible film. However, the too small gap between the nanosheets hinders ion migration, which eventually leads to a low practical energy storage capacity. Existing methods for adjusting the interlayer spacing of M...

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): C01B32/90C01B21/06
Inventor 徐斌陈赫朱奇珍
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