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A self-supporting two-dimensional mxene@znmn 2 o 4 Preparation and Application of Composite Electrode Materials

A composite electrode and self-supporting technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of cumbersome preparation of electrode materials and difficulties in the preparation of template methods, achieve great practical value and scientific research value, save preparation costs, and be friendly water effect

Active Publication Date: 2020-11-06
SHANDONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The ZnMn 2 o 4 The negative electrode material has good lithium storage and sodium storage properties, but its preparation is difficult by template method, and the preparation of the negative electrode material needs to be mixed with carbon black and binder to form a uniform slurry and coated on the current collector , the preparation of electrode materials is cumbersome

Method used

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  • A self-supporting two-dimensional mxene@znmn <sub>2</sub> o <sub>4</sub> Preparation and Application of Composite Electrode Materials
  • A self-supporting two-dimensional mxene@znmn <sub>2</sub> o <sub>4</sub> Preparation and Application of Composite Electrode Materials
  • A self-supporting two-dimensional mxene@znmn <sub>2</sub> o <sub>4</sub> Preparation and Application of Composite Electrode Materials

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preparation example Construction

[0036] As introduced in the background technology, for the current two-dimensional ZnMn 2 o 4 Prepare difficult problems. Therefore, the present invention proposes a two-dimensional MXene and two-dimensional flake ZnMn 2 o 4 Material composite flexible self-supporting film and preparation method thereof, comprising:

[0037] Two-dimensional flake ZnMn 2 o 4 The preparation method of the present invention comprises compounding a zinc-based metal organic framework compound and a manganese-based metal organic framework compound at a ratio of 1:2 to obtain a bimetallic organic framework compound as a precursor, and heat treatment in an air atmosphere to obtain a two-dimensional Flake ZnMn 2 o 4 Material.

[0038] Further, the heating rate of the heat treatment is 1° / min~5° / min;

[0039] Further, the heat-holding temperature of the heat treatment is 350-550°C, and the holding time is 2 hours-10 hours;

[0040] To prepare a two-dimensional MXene colloidal solution, stir th...

Embodiment 1

[0058] Weigh 0.7846g of perylenetetracarboxylic dianhydride, dissolve in 125ml of 0.32g of sodium hydroxide solution, and stir at room temperature for half an hour to obtain A solution.

[0059] Weigh 0.244g of zinc acetate and 0.45g of manganese acetate and dissolve them in 225ml of deionized water, and stir for half an hour to obtain B solution.

[0060] Subsequently, solution A was added dropwise to solution B, and continued to stir for one hour to mix evenly, then put it into a high-temperature and high-pressure reactor, and kept it in a constant temperature oven at 100°C for 6 hours to obtain layered / accordion-shaped ZnMn 2 Bimetallic organic framework materials.

[0061] Then, the ZnMn 2 The bimetal organic framework material is heated to 500°C at a heating rate of 1-5°C / min, and kept at 500°C for 6 hours to obtain a two-dimensional sheet ZnMn 2 o 4 powder.

[0062] Select Ti in MAX phase 3 AlC 2 powder, stirred in a mixed solution of hydrochloric acid and lithium ...

Embodiment 2

[0070] MAX phase chooses V 2 AlC powder, etched with hydrochloric acid and potassium fluoride to remove the middle aluminum atomic layer.

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Abstract

The invention relates to a preparation and an application of a self-supporting two-dimensional MXene@ZnMn2O4 composite electrode material. The method comprises the following steps: heat-treating a bimetallic organic framework compound as a precursor in air atmosphere to obtain two-dimensional sheet-like ZnMn2O4; compounding the two-dimensional sheet-like ZnMn2O4 with peeled MXene colloidal solution; and carrying out pump filtration under vacuum to obtain a flexible self-supporting ZnMn2O4@MXene electrode material. The method is simple and easy to implement, can be used to self-assemble an integrated three-dimensional flexible electrode without any additives or conductive agents, and can reduce the production cost. Moreover, the conductivity of the electrode material can be improved, and the flexible MXene two-dimensional sheets can be used as a buffer substrate for the volume expansion of ZnMn2O4. The method has great potential to improve the electrochemical performance of the electrode material, and thus, has great application value and industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of preparation of two-dimensional materials and electrode materials, in particular to a self-supporting two-dimensional sheet-like MXene and a two-dimensional sheet-like ZnMn 2 o 4 Preparation and application of composite electrode materials. 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 rapid development of microelectronic information technology, the demand for electric vehicles and large-scale energy storage is increasing. Based on the current urgent demand for green, efficient and practical energy storage materials, high-performance and large-capacity secondary energy storage can be recharg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/58
CPCH01M4/366H01M4/505H01M4/58Y02E60/10
Inventor 冯金奎田园
Owner SHANDONG UNIV
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