Flexible three-dimensional layered MXene@indium composite film and preparation method and application thereof

A composite film, layered technology, applied in electrode manufacturing, structural parts, electrical components, etc., can solve the problems of reducing lithium metal battery capacity, shortening battery life, SEI film damage, etc., to reduce deposition dissolution overpotential, Improves uniformity and reduces nucleation barriers

Inactive Publication Date: 2019-12-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the charging process of lithium metal secondary batteries, dendritic metal lithium, that is, metal lithium dendrites, is likely to form on the surface of the negative electrode during the repeated deposition and precipitation of lithium ions during reduction, and the sharp metal lithium dendrites are likely to pierce The diaphragm, thus contacting the positive electrode material of the batt

Method used

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  • Flexible three-dimensional layered MXene@indium composite film and preparation method and application thereof
  • Flexible three-dimensional layered MXene@indium composite film and preparation method and application thereof
  • Flexible three-dimensional layered MXene@indium composite film and preparation method and application thereof

Examples

Experimental program
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Example Embodiment

[0024] In another specific embodiment of the present invention, a method for preparing the above-mentioned three-dimensional layered MXene@In composite film is provided. The method includes: preparing a three-dimensional layered MXene film; and electrodepositing metal indium on the three-dimensional layered MXene film.

[0025] In another specific embodiment of the present invention, the preparation of the three-dimensional layered MXene membrane includes: a homogeneous MXene colloidal solution, which is prepared by suction filtration and drying;

[0026] In another specific embodiment of the present invention, the preparation method of the homogeneous MXene colloidal solution includes: adding MAX phase powder to a mixed solution of acid and fluoride, stirring, adding water, centrifuging, and forming a small peeled layer by ultrasonic action Or a single layer of MXene body solution;

[0027] In another specific embodiment of the present invention, the MAX phase powder includes Ti 3 A...

Example Embodiment

[0045] Example 1:

[0046] Take 0.5gTi 3 AlC 2 The powder is stirred in a mixed solution of 10ml of 6M hydrochloric acid and 0.5g of lithium fluoride, then added with water, centrifuged (3500r / min) to remove excess acid and fluoride, and then ultrasonically stripped to separate the resulting small-layer MXene colloidal solution. After filtering, drying in a vacuum oven at 60°C to obtain a flexible and self-supporting three-dimensional layered MXene film;

[0047] Weigh 0.0595g of indium chloride, dissolve it in 100ml of deionized water, and stir for half an hour at room temperature to obtain an electrodeposition solution;

[0048] Subsequently, in the two-electrode electrolyzer, put the electrodeposition solution, and then 1mA / cm 2 The MXene film is used as a working electrode for 1 hour at a constant current density and then washed with water and dried at 60°C for 12 hours to obtain a flexible and self-supporting three-dimensional layered MXene@In film;

[0049] Finally, the battery ...

Example Embodiment

[0053] Example 2:

[0054] Take 0.5gV 2 AlC powder, stir in a mixed solution of 10ml of 6M hydrochloric acid and 0.5g of lithium fluoride, then add water, centrifuge to remove excess acid and fluoride, and then peel off ultrasonically to separate the resulting small-layer MXene colloidal solution. After suction filtration, Dry in a vacuum oven at 60°C to obtain a flexible and self-supporting three-dimensional layered MXene film;

[0055] Weigh 0.0595g of indium chloride, dissolve it in 100ml of deionized water, and stir for half an hour at room temperature to obtain an electrodeposition solution;

[0056] Subsequently, in the two-electrode electrolyzer, put the electrodeposition solution, and then 1mA / cm 2 The MXene film is used as a working electrode for 1 hour at a constant current density and then washed with water and dried at 60°C for 12 hours to obtain a flexible and self-supporting three-dimensional layered MXene@In film;

[0057] Finally, the battery is assembled in a glove bo...

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Abstract

The invention discloses a flexible three-dimensional layered MXene@indium composite film and a preparation method and application thereof. The flexible composite film is prepared by depositing metal indium (In) with a low melting point onto a flexible self-supporting MXene film by a simple and industrial electrodeposition method, wherein indium can be subjected to alloying reaction with metal lithium, and indium has excellent lithium affinity, so nucleation barriers can be effectively reduced, the actual current density in the lithium deposition and dissolution process is reduced, the reduction of deposition dissolution overpotential is facilitated, the uniformity of deposition is improved, the preparation method is simple, the internal lithium ion transmission rate is increased, the lithium deposition direction can be changed, and the battery safety problem caused by the fact that the lithium dendrites pierce the diaphragm is relieved; the composite material has an excellent effect ofinhibiting the growth of the lithium dendrites, the electrodeposition operation is simple and convenient, and large-scale production can be realized, so that the preparation method has the great application value and scientific research value.

Description

technical field [0001] The invention belongs to the field of composite material preparation and lithium metal battery technology, and specifically relates to a flexible three-dimensional layered MXene@indium composite film and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the increasing demand for electric vehicles, large-scale energy storage, and light electric vehicles, the global non-renewable resources are decreasing. Based on the current urgent demand for green, efficient, and practical energy storage materials, high-performance The development of rechargeable and dischargeable batteries for secondary energy storage is i...

Claims

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Application Information

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IPC IPC(8): H01M4/66H01M4/134H01M4/04H01M4/1395H01M10/052
CPCH01M4/0452H01M4/134H01M4/1395H01M4/661H01M4/667H01M10/052Y02E60/10
Inventor 冯金奎田园安永灵
Owner SHANDONG UNIV
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