Method for constructing three-dimensional MXene array by using liquid crystal MXene, and three-dimensional MXene array

A liquid crystal, three-dimensional technology, applied in the field of electrochemistry, can solve problems such as the complexity of the three-dimensional Mxene array method, achieve the effect of solving the random orientation of the pore structure, suitable for large-scale production, and good orientation

Active Publication Date: 2019-05-03
四川金时新能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the method for preparing a vertically grown three-dimensional Mxene array is relatively complicated

Method used

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  • Method for constructing three-dimensional MXene array by using liquid crystal MXene, and three-dimensional MXene array
  • Method for constructing three-dimensional MXene array by using liquid crystal MXene, and three-dimensional MXene array
  • Method for constructing three-dimensional MXene array by using liquid crystal MXene, and three-dimensional MXene array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] S1, preparation of MXene colloidal solution

[0048] Add 30mL of 6mol / L HCl into 1.3g LiF, mix well, weigh 1.2g of Ti 3 AlC 2 The powder was added into the mixed solution of HCl+LiF, and reacted in a water bath at 45°C for 40 hours; the reaction product was repeatedly washed and centrifuged until the pH value was close to 7, and dried in vacuum to obtain MXene powder.

[0049] Weigh 0.2 g of Mxene powder and add it to 25 ml of deionized water, sonicate for 1 h, and then centrifuge at 3500 r / min for 1 h to obtain the upper layer of Mxene colloidal solution.

[0050] S2, obtaining the liquid crystallized Mxene solution modified by sodium alginate

[0051] Weigh an appropriate amount of sodium alginate powder and add it to the Mxene colloidal solution prepared in step S1, stir for 30 minutes, and then sonicate for 30 minutes to obtain a liquid crystallized Mxene solution modified by sodium alginate. Wherein, the mass ratio of MXene powder to sodium alginate is 1:3.

[...

Embodiment 2

[0057] A method for constructing a three-dimensional MXene array by using liquid crystallized MXene provided in this embodiment is basically the same as the method for constructing a three-dimensional MXene array by using liquid crystallized MXene provided in Example 1. The difference is that in this embodiment, The mass ratio of MXene powder to sodium alginate is 1:2.

[0058] A three-dimensional MXene array is prepared by using liquid crystallized MXene to construct a three-dimensional MXene array in this embodiment.

Embodiment 3

[0060] A method for constructing a three-dimensional MXene array by using liquid crystallized MXene provided in this embodiment is basically the same as the method for constructing a three-dimensional MXene array by using liquid crystallized MXene provided in Example 1. The difference is that in this embodiment, The mass ratio of MXene powder to sodium alginate is 1:1.

[0061] A three-dimensional MXene array is prepared by using liquid crystallized MXene to construct a three-dimensional MXene array in this embodiment.

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Abstract

The invention relates to the field of electrochemistry, in particular to a method for constructing a three-dimensional MXene array by using a liquid crystal MXene, and the three-dimensional MXene array. The method for constructing the three-dimensional MXene array by using the liquid crystal MXene comprises the steps of: etching a MAX phase material to obtain a MXene colloidal solution having goodconductivity; then adding a modifier capable of inducing the MXene to form a three-dimensional network structure into the MXene colloidal solution, and evenly mixing the mixture to obtain a modifiedMxene liquid crystal solution; then evenly coating the surface of a silicon wafer having surface hydrophilicity coated with the Mxene colloidal solution to obtain a layer of MXene film; and placing two silicon wafers oppositely in the modified Mxene liquid crystal solution, and performing rapid cooling under the action of an externally applied electric field. The process is simple, the reaction iseach to control. The arrays in the prepared three-dimensional MXene array have good orientation and are arranged neatly.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for constructing a three-dimensional MXene array by using liquid crystallized MXene and the three-dimensional MXene array. Background technique [0002] In recent years, the scalable and sustainable fabrication of high-energy, high-power thick electrode films is the key to realizing large-scale electrochemical energy storage. Traditional electrode preparation methods often lead to redeposition of two-dimensional nanomaterials, which limits the transport of ions in thick films, resulting in a system whose electrochemical performance is highly dependent on the thickness of the film. The vertical arrangement of two-dimensional flakes can achieve ion transport. Directed transport for thickness-independent electrochemical performance in supercapacitors. [0003] MXene material is a two-dimensional layered structure of pre-transition metal carbides and carbonitrides developed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/26G02F1/1337
Inventor 杨维清黄海超张海涛陈宁俊储翔谢岩廷
Owner 四川金时新能科技有限公司
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