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Preparation method of Fe2+ supported MXene for sodium ion battery negative electrode material

A technology for sodium ion batteries and negative electrode materials, which can be used in battery electrodes, secondary batteries, circuits, etc., and can solve problems such as complex preparation processes

Inactive Publication Date: 2019-08-23
杭州求实新材料科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the currently reported ion-pillared MXenes all need to be pre-pillared by other alkali metal ions or organic molecules, and the preparation process is relatively complicated.

Method used

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preparation example Construction

[0009] The present invention is Fe used for the negative electrode material of sodium ion battery 2+ A simple preparation method for supporting MXene, the steps are: FeCl 2 Dissolve in deionized water at a certain concentration to obtain FeCl 2 Aqueous solution; Ultrasonic dispersion of single-layer MXene powder in deionized water to obtain MXene dispersion; Slowly add FeCl to the MXene dispersion while stirring 2 aqueous solution, after stirring for 12 hours, the resulting precipitate was washed and dried to obtain Fe for the negative electrode of the sodium ion battery 2+ Supported MXene.

[0010] The above-mentioned Fe for the negative electrode material of the sodium ion battery 2+ The preparation method of supporting MXene, its specific steps are:

[0011] (1) Prepare a certain concentration of FeCl 2 Solution 10 mL;

[0012] (2) Add 50 mg of monolayer MXene powder to 10 mL of deionized water, and sonicate in an ice bath for 1 hour to obtain MXene dispersion;

[00...

Embodiment 1

[0020] (1) Prepare FeCl with a concentration of 0.005mol / L 2 Solution 10 mL;

[0021] (2) Add 50 mg of single-layer MXene powder into 10 mL of deionized water, and sonicate in an ice bath for 1 h to obtain MXene dispersion;

[0022] (3) Add the MXene dispersion obtained in step (2) dropwise to the FeCl obtained in step (1) with stirring 2 in solution;

[0023] (4) Stir the reaction at room temperature for 12 h, then centrifuge and wash three times at 3000 rad / min, and finally dry to obtain Fe 2+ Supported MXene.

Embodiment 2

[0025] (1) Prepare FeCl with a concentration of 0.015mol / L 2 Solution 10 mL;

[0026] (2) Add 50 mg of single-layer MXene powder into 10 mL of deionized water, and sonicate in an ice bath for 1 h to obtain MXene dispersion;

[0027] (3) Add the MXene dispersion obtained in step (2) dropwise to the FeCl obtained in step (1) with stirring 2 in solution;

[0028] (4) Stir the reaction at room temperature for 12 h, then centrifuge and wash three times at 3000 rad / min, and finally dry to obtain Fe 2+ Supported MXene.

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Abstract

The invention relates to a preparation method of Fe2+ supported MXene for a sodium ion battery negative electrode material and belongs to the field of material preparation. The method mainly comprisessteps that FeCl2 solution is prepared, and single-layer MXene is ultrasonically dispersed in deionized water to obtain MXene dispersion liquid; the MXene is slowly added to the FeCl2 solution after being dispersed and stirred under the room temperature for 12h, and the precipitate is washed and dried to obtain the Fe2+ supported MXene for the sodium ion battery negative electrode material.

Description

technical field [0001] The present invention relates to Fe for sodium ion battery negative electrode material 2+ Support the preparation technology of MXene. Background technique [0002] Compared with lithium-ion batteries, sodium metal used in sodium-ion batteries has the advantages of abundant sources and low cost, and the intercalation process of sodium ions in negative electrode materials is very similar to that of lithium ions. Therefore, sodium-ion batteries are expected to become large-scale batteries in the future. , Low-cost chemical energy storage power supply is favored. Due to its unique two-dimensional layered structure and good Na ion intercalation / extraction properties, MXene is currently one of the ideal anode materials for Na-ion batteries. However, MXene will self-stack during use, which makes its active surface not fully utilized, and hinders the intercalation / extraction of sodium ions, resulting in relatively low rate performance. Therefore, by adding...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/587H01M10/054
CPCH01M4/362H01M4/58H01M4/587H01M10/054Y02E60/10
Inventor 牛棱渊张雨杉刘卯成张小美
Owner 杭州求实新材料科技有限公司
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