Flexible self-supporting MXene/zinc composite electrode and preparation method and application thereof

A composite electrode, self-supporting technology, applied in active material electrodes, hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., to achieve good versatility, good hydrophilicity, and save production costs

Inactive Publication Date: 2020-01-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the new two-dimensional MXene material discovered by Yury et al. has the advantages of good mechanical flexibility, high specific surface area, stable chemical properties, high electrical conductivity and unique photoelectric properties. The colloidal solution of two-dimensional MXene can be used in the absence of In the case of additives, self-supporting, hydrophilic, flexible and conductive films are assembled. It has graphene-like properties, but it is superior to graphene in many properties, so it attracts researchers in many materials and chemical fields. , MXene has great potential to inhibit the growth of metal anodes, and there are few related reports

Method used

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  • Flexible self-supporting MXene/zinc composite electrode and preparation method and application thereof
  • Flexible self-supporting MXene/zinc composite electrode and preparation method and application thereof
  • Flexible self-supporting MXene/zinc composite electrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] MAX phase selection most common Ti 3 AlC 2 powder, stirred in a mixed solution of 10ml hydrochloric acid and 0.8g zinc fluoride, then added water and centrifuged to remove excess acid and fluoride, and then peeled off the multilayer MXene by ultrasonic peeling and centrifugation to separate the resulting few-layer / multilayer MXene Colloidal solution, select 50ml of the above-mentioned colloidal solution, after filtering, dry in a vacuum oven at 50 degrees Celsius to obtain a flexible self-supporting three-dimensional layered MXene film;

[0045] Prepare 2 moles per liter of zinc sulfate aqueous solution, use ultrapure water as a solvent, stir at room temperature for half an hour until it is clear and transparent, and obtain an electrodeposition solution containing divalent zinc salt;

[0046] Subsequently, in the electrolytic tank, put 20ml of electroplating solution, and then deposit a suitable time with a current density of 1 milliampere per square centimeter. The MX...

Embodiment 2

[0051] MAX phase chooses V 2 AlC powder, MAX phase choose V 2 AlC powder, etched with hydrochloric acid and lithium fluoride at 50 degrees Celsius to remove the aluminum atomic layer, then peeled off to obtain MXene colloidal solution, and suction filtered to obtain MXene film; then, prepare 2 moles per liter of zinc chloride aqueous solution for electrodeposition solution, performing electrodeposition in an electrolytic bath.

Embodiment 3

[0053] MAX phase chooses Ti 3 AlC 2 Powder, Example 1 of the preparation method of MXene, the main salt of the electrodeposition solution is zinc chloride, the solvent is dehydrated alcohol, the concentration is 2 moles per liter, electrodeposition and drying are performed under the same electrodeposition conditions as in Example 1 , the three-dimensional layered MXene / Zn composite film can effectively inhibit the growth of metal dendrites when used as a current collector for zinc metal anode and lithium metal anode.

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Abstract

The invention relates to a flexible self-supporting three-dimensional layered MXene / zinc composite electrode and a preparation method and application thereof. The composite material is composed of a three-dimensional layered MXene film and metal zinc, wherein the three-dimensional layered MXene film is composed of one or a mixture of more than two of Ti3C2, Nb4C3, Ti2C, Ta4C3, TiNbC, (V0.5Cr0.5)3C2, V2C, Nb2C, Ti3CN, Ti3C2, Ti2C, Ta4C3, TiNbC, (V0.5Cr0.5)3C2, V2C, Nb2C, Nb4C3 or Ti3CN; and the three-dimensional layered MXene film is loaded with zinc. The flexible self-supporting MXene / zinc composite electrode has larger specific surface area, can load more zinc, can serve as a zinc metal negative electrode or a current collector of a lithium metal negative electrode, can well suppress growth of zinc dendrites or lithium dendrites, and can be used as the negative electrode material of a secondary charge-discharge battery, such as a lithium-ion battery or a sodium-ion battery or a potassium-ion battery, or the electrode material of a supercapacitor.

Description

technical field [0001] The invention belongs to the technical field of electrode material preparation, and in particular relates to a flexible self-supporting MXene / zinc composite electrode 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 imminent. [0004] Metal zinc (Zn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M4/1395H01M4/42H01M4/62H01M4/66H01M10/0525H01M10/054H01G11/24H01G11/26H01G11/30H01G11/32H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/32H01G11/86H01M4/134H01M4/1395H01M4/42H01M4/625H01M4/628H01M4/662H01M4/663H01M4/667H01M10/0525H01M10/054H01M2004/021H01M2004/027Y02E60/10Y02E60/13
Inventor 冯金奎田园安永灵
Owner SHANDONG UNIV
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