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Highly ordered terminated MXene as well as preparation method and application thereof

A highly ordered and end-group technology, applied to structural parts, separators/films/diaphragms/spacer components, electrical components, etc., can solve the problem of being unable to achieve a high degree of ordering of a single group, and achieve high energy density And high security, high capacity and rate performance, the effect of suppressing puncture

Active Publication Date: 2022-08-02
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a highly ordered terminal MXene and its preparation method and application. The terminal MXene can effectively solve the problem that existing MXene materials cannot realize single group Highly Ordered Questions

Method used

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  • Highly ordered terminated MXene as well as preparation method and application thereof
  • Highly ordered terminated MXene as well as preparation method and application thereof
  • Highly ordered terminated MXene as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of highly ordered end-group MXene, comprising the following steps:

[0030] (1) 2g LiF was added to 40mL of 9M HCl which was stirred continuously, and 2g Ti was added to it 3 AlC 2 , and then put the above solution in a 40°C water bath and stirred for 24h to prepare MXene etched products, then washed with ultrapure water to pH 6, and then dried at 40°C for 24h to obtain MXene powder;

[0031] (2) The MXene powder in step (2) was made into a dispersion liquid of 10 mg / mL, and then ultrasonication was carried out at 300W power for 1 h with an ultrasonic crusher, and then centrifuged at 3500 r / min for 60 min, the upper dispersion liquid was collected, and then 20 mL of The upper dispersion liquid is suction filtered to obtain the MXene self-supporting membrane;

[0032] (3) performing plasma etching treatment on the MXene self-supporting film prepared in step (3), specifically: placing the prepared MXene self-supporting film in the chamber of an indu...

Embodiment 2

[0034] A preparation method of highly ordered end-group MXene, comprising the following steps:

[0035] (1) 2g LiF was added to 40mL of 9M HCl which was stirred continuously, and 2g Ti was added to it 3 AlC 2 , and then put the above solution in a 35°C water bath and stirred for 30h to prepare MXene etched products, then washed with ultrapure water to pH 6, and then dried at 35°C for 30h to obtain MXene powder;

[0036] (2) The MXene powder in step (2) was made into a dispersion liquid of 12 mg / mL, and then ultrasonication was carried out at 350W power for 1 h with an ultrasonic crusher, and then centrifuged at 3000 r / min for 70 min, the upper dispersion liquid was collected, and then 20 mL of The upper dispersion liquid is suction filtered to obtain the MXene self-supporting membrane;

[0037] (3) performing plasma etching treatment on the MXene self-supporting film prepared in step (3), specifically: placing the prepared MXene self-supporting film in the chamber of an indu...

Embodiment 3

[0039] A preparation method of highly ordered end-group MXene, comprising the following steps:

[0040] (1) 2g LiF was added to 40ml of 9M HCl which was stirred continuously, and 2g Ti was added to it 3 AlC 2 , and then put the above solution in a 45°C water bath and stirred for 20h to prepare MXene etched products, then washed with ultrapure water to pH 7, and then dried at 45°C for 20h to obtain MXene powder;

[0041] (2) The MXene powder in step (2) was made into a dispersion liquid of 10 mg / mL, and then ultrasonication was carried out at 400W power for 1 h with an ultrasonic crusher, and then centrifuged at 4000 r / min for 60 min, the upper dispersion liquid was collected, and then 20 mL of The upper dispersion liquid is suction filtered to obtain the MXene self-supporting membrane;

[0042] (3) performing plasma etching treatment on the MXene self-supporting film prepared in step (3), specifically: placing the prepared MXene self-supporting film in the chamber of an indu...

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Abstract

The invention provides highly ordered terminated MXene as well as a preparation method and application thereof, and the preparation method comprises the following steps: preparing an MXene etching product, and then washing and drying to prepare MXene powder; the preparation method comprises the following steps: preparing a dispersion liquid from MXene powder, sequentially carrying out ultrasonic treatment and centrifugal treatment, collecting an upper-layer dispersion liquid, and carrying out suction filtration on the dispersion liquid to prepare an MXene self-supporting membrane; and carrying out plasma etching treatment on the prepared MXene self-supporting film. The terminated MXene can effectively solve the problem that the existing MXene material cannot realize high ordering of a single group.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, and in particular relates to a highly ordered end-group MXene and a preparation method and application thereof. Background technique [0002] Energy and the environment play a vital role in world development, and with the rapid reduction of fossil fuels and the deterioration of the environment, an energy revolution is imminent. Lithium-ion batteries and supercapacitors, as representatives of two green energy storage devices, have achieved great success in recent developments. However, in recent decades, the demand for high-energy, power-density energy storage systems has grown exponentially, based on commercially available batteries with graphite as the anode and lithium transition metal oxide as the cathode, as well as conventional carbon-based supercapacitors It can no longer meet the needs of the current social energy. Therefore, the development and replacement of new electrode m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/40
CPCH01M50/40H01M50/403Y02E60/13
Inventor 张海涛黄浚峰孙藤
Owner SOUTHWEST JIAOTONG UNIV
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