Preparation method and application of less-fluorite porous titanium carbide MXene

A technology of titanium carbide maikeene and hydrofluoric acid is applied in the application of lithium metal battery working electrodes, and the preparation field of titanium carbide maikeene can solve the problems of low coulombic efficiency, poor cycle stability, poor safety, etc. Simple operation, excellent performance, low cost effect

Inactive Publication Date: 2019-05-17
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uncontrollable dendrite growth of lithium metal anodes during cycling results in low Coulombic efficiency, poor cycle stability, and poor safety.

Method used

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  • Preparation method and application of less-fluorite porous titanium carbide MXene
  • Preparation method and application of less-fluorite porous titanium carbide MXene
  • Preparation method and application of less-fluorite porous titanium carbide MXene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of less fluorine porous titanium carbide Micone, comprising the following steps:

[0022] 1) Put 2gTi 3 AlC 2 Dissolve in 35 ml of concentrated hydrofluoric acid (mass concentration 37%), stir magnetically for 2 days, ultrasonically clean 3 times with deionized water and ethanol, and then dry at 60°C to obtain powder A;

[0023] 2) Disperse the above powder A into 75ml of 10M sodium hydroxide solution, stir magnetically for 2 hours, ultrasonically clean with deionized water and ethanol for 3 times, and then dry at 60°C to obtain powder B;

[0024] 3) Disperse the above powder B in 30ml deionized water to obtain a solution, transfer the solution to a stainless steel autoclave lined with polytetrafluoroethylene, and place the autoclave in a constant temperature drying oven at 175°C for 18 hours , and then ultrasonically cleaned three times with deionized water and ethanol, and finally dried at 60°C to obtain powder C;

[0025] 4) Disperse the above...

Embodiment 2

[0029] A preparation method of less fluorine porous titanium carbide Micone, comprising the following steps:

[0030] 1) Put 1gTi 3 AlC 2 Dissolve in 20ml of concentrated hydrofluoric acid (mass concentration 35%), stir magnetically for 1 day, ultrasonically clean 3 times with deionized water and ethanol, and then dry at 5°C to obtain powder A;

[0031] 2) Disperse the above powder A into 50ml of 5M sodium hydroxide solution, stir magnetically for 1 hour, ultrasonically clean with deionized water and ethanol for 3 times, and then dry at 55°C to obtain powder B;

[0032]3) Disperse the above powder B in 20ml of deionized water to obtain a solution, transfer the solution to a stainless steel autoclave lined with polytetrafluoroethylene, and place the autoclave in a constant temperature drying oven at 150°C for 20 hours , and then ultrasonically cleaned three times with deionized water and ethanol, and finally dried at 55°C to obtain powder C;

[0033] 4) Disperse the above po...

Embodiment 3

[0036] A preparation method of less fluorine porous titanium carbide Micone, comprising the following steps:

[0037] 1) Add 3gTi 3 AlC 2 Dissolve in 50 ml of concentrated hydrofluoric acid (mass concentration 40%), stir magnetically for 1-3 days, ultrasonically clean 4 times with deionized water and ethanol, and then dry at 65°C to obtain powder A;

[0038] 2) Disperse the above powder A into 100ml of 15M sodium hydroxide solution, stir magnetically for 1-3h, ultrasonically clean with deionized water and ethanol for 4 times, and then dry at 65°C to obtain powder B;

[0039] 3) Disperse the above powder B in 40ml of deionized water to obtain a solution, transfer the solution to a stainless steel autoclave lined with polytetrafluoroethylene, and place the autoclave in a constant temperature drying oven at 200°C for 16 hours , and then ultrasonically cleaned four times with deionized water and ethanol, and finally dried at 65°C to obtain powder C;

[0040] 4) Disperse the abo...

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Abstract

The invention discloses a preparation method and application of less-fluorite porous titanium carbide MXene. According to the method, Ti3AlC2 is dissolved in concentrated hydrofluoric acid, and cleaning and drying are carried out after magnetic stirring so as to obtain powder A; the powder A is dispersed in sodium hydroxide solution, and cleaning and drying are carried out after magnetic stirringso as to obtain powder B; the powder B is dispersed in deionized water to obtain solution, the solution is transferred into a high-pressure reactor to be placed in a constant-temperature dryer for constant-temperature drying, and cleaning and drying are carried out to obtain powder C; and the powder C is dispersed in diluted hydrofluoric acid, and cleaning and drying are carried out after magneticstirring so as to obtain the less-fluorite porous titanium carbide MXene. The less-fluorite porous titanium carbide MXene provided by the invention is applied to working electrode materials of lithium metal batteries to express relatively low nucleation overpotential and excellent cycle stability, is capable of effectively inhibiting the growth of lithium dendrites, and has excellent applicationprospect in low-cost high-performance lithium metal batteries.

Description

technical field [0001] The invention relates to the field of lithium metal batteries, in particular to a preparation method of less-fluorine porous titanium carbide meconene and its application in lithium metal battery working electrodes. Background technique [0002] With the vigorous development of high-end electronic equipment, the human demand for high-energy-density batteries is also increasing. Due to the ultrahigh theoretical specific capacity (3860mAh / g) and the lowest negative electrochemical potential (-3.040V vs. standard hydrogen electrode), lithium metal anodes are considered to be the most promising candidates for high energy density batteries. one. However, the uncontrollable dendrite growth of lithium metal anodes during cycling leads to low Coulombic efficiency, poor cycling stability, and poor safety. Therefore, the development of lithium metal anode materials that can inhibit the growth of lithium dendrites is the current research hotspot and focus in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/587H01M10/052
CPCY02E60/10
Inventor 洪振生黄万露丁凌怡童庆松
Owner FUJIAN NORMAL UNIV
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