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

TiO2/graphene multi-element modified Mxene composite material and preparation method thereof

A technology of titanium dioxide and composite materials, applied in the field of composite materials and their preparation, can solve the problems of the longitudinal conductivity of Mxene materials embedded in other materials, the small interlayer spacing of Mxene materials, and the lack of modification and improvement of the longitudinal conductivity of Mxene materials, and achieve excellent performance. Cycling performance and capacity reversibility, effects of improving longitudinal and surface conductivity, and improving electrochemical performance

Active Publication Date: 2019-01-11
CENT SOUTH UNIV
View PDF9 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor surface and longitudinal conductivity of intrinsic Mxene materials, its application in the field of energy storage is limited to some extent.
[0005] CN107633954A discloses a kind of Graphene / Mxene composite electrode material and application thereof, although gained Graphene / Mxene composite material has effectively improved Mxene material electrical conductivity, gained Graphene / Mxene composite material does not improve Mxene material longitudinal conductivity sexual enhancement
[0006] CN107170587A discloses a sulfur-doped Mxene material and its preparation method and application. Although the Mxene material is doped and modified by sulfur atoms, its conductivity and electrochemical performance are effectively improved, but its discharge specific capacity is relatively low
However, the interlayer spacing of the Mxene material obtained by this preparation method is still relatively small, and it is impossible to embed other materials inside it to improve the longitudinal conductivity of the Mxene material

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
  • TiO2/graphene multi-element modified Mxene composite material and preparation method thereof
  • TiO2/graphene multi-element modified Mxene composite material and preparation method thereof
  • TiO2/graphene multi-element modified Mxene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Add 30 g of HF acid (40% mass fraction) into a polytetrafluoroethylene tank, add 1.0 g of Mxene precursor to it, and stir for 6 h at 400 rpm at a constant temperature of 90 °C to carry out the Mxene precursor etching;

[0037] (2) Add the Mxene obtained in step (1) into water, centrifuge at 10,000 rpm, cross-wash the precipitate with deionized water and absolute ethanol for 10 times, ultrasonicate at 400 W for 1 h, and incubate at 80°C , dried for 10 h to obtain Mxene material;

[0038] (3) Add 0.1 g of the Mxene material obtained in step (2) into 60 mL of deionized water, conduct ultrasonic dispersion at 400 W for 1 h, add 0.8 g of ammonium bicarbonate, and stir at 400 rpm for 2 h to obtain a surface Charge modified Mxene material dispersion;

[0039] (4) Add 0.005 g of nanoscale titanium dioxide and graphene oxide into 5 mL of deionized water, and disperse ultrasonically for 2 h at 400 W to obtain titanium dioxide dispersion and graphene oxide dispersion, respec...

Embodiment 2

[0050] (1) Add 30 g of HF acid (mass fraction 25%) into a polytetrafluoroethylene tank, add 1.0 g of Mxene precursor to it, and stir for 10 h at 300 rpm at a constant temperature of 85 °C to carry out the Mxene precursor etching;

[0051] (2) Add the Mxene obtained in step (1) into water, centrifuge at 5000 rpm, cross-wash the precipitate with deionized water and absolute ethanol for 10 times, ultrasonicate at 400 W for 1 h, and store at 80 °C , dried for 10 h to obtain Mxene material;

[0052] (3) Add 0.1 g of the Mxene material obtained in step (2) into 60 mL of deionized water, perform ultrasonic dispersion at 400 W for 1 h, add 1.5 g of ammonia water, and stir at 400 rpm for 1 h to obtain the surface charge modification. Proactive Mxene material dispersion;

[0053] (4) Add 0.01 g of nanoscale titanium dioxide and graphene oxide into 5 mL of deionized water, and disperse ultrasonically for 2 h at 400 W to obtain titanium dioxide dispersion and graphene oxide dispersion, ...

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
Internal resistanceaaaaaaaaaa
Login to View More

Abstract

A titanium dioxide / graphene multicomponent modified Mxene composite material is prepared by the following methods: (1) adding Mxene precursor into HF acid solution, heating, stirring and etching; (2)centrifuging, washing, ultrasonic and drying the etched material to obtain Mxene material; 3) adde Mxene material into water, ultrasonic disper, adding surface charge modifier and stirring; 4) adde nanometer titanium dioxide and graphene oxide into water respectively, ultrasonic disper to obtain titanium dioxide and graphene oxide dispersions respectively; 5) adde that dispersion of titanium dioxide and graphene oxide into the Mxene dispersion in turn, stirring, filter and drying; (6) heat treatment in an inert atmosphere. Nanometer titanium dioxide partially intercalates between Mxene layersto improve the longitudinal conductivity of Mxene, and partially adsorbs on the surface of Mxene material to improve its surface conductivity. Graphene Coating on Mxene Surface to Improve Conductivityof Mxene Surface. The assembled lithium ion battery has high specific capacity, high rate performance and good cycle stability.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a titanium dioxide / graphene multi-component modified Mxene composite material and a preparation method thereof. Background technique [0002] Lithium-ion batteries have become ideal energy storage devices due to their high energy density, high power density, environmental friendliness, long service life, and superior safety performance. [0003] Since the advent of graphene two-dimensional materials, two-dimensional materials have become a hot topic in scientific research. Two-dimensional materials have a special layered structure, which is useful in mechanics, optics, electrochemistry, and so on. Informatics shows excellent performance. At present, two-dimensional materials have been deeply studied in the fields of catalysts, energy storage devices, sensors and biomaterials. [0004] Graphene is a typical representative of two-dimensional materials. In...

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): H01M4/36H01M4/48H01M4/583H01M10/0525
CPCH01M4/366H01M4/48H01M4/583H01M10/0525Y02E60/10
Inventor 郑俊超安长胜左定川宋生超杨书棋肖彬汤林波贺振江
Owner CENT SOUTH UNIV
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com