MoS2 inserted-layer Ti3C2 lithium ion battery negative electrode material and preparation method thereof

A technology for lithium-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of improving electrochemical performance that have not been reported publicly, and achieve excellent electrochemical performance, open structure, interlayer spacing Increased effect

Inactive Publication Date: 2017-03-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] After literature search, the present invention is aimed at MoS 2 Intercalated Ti 3 C 2 Improved electrochemical performance has not been reported publicly

Method used

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  • MoS2 inserted-layer Ti3C2 lithium ion battery negative electrode material and preparation method thereof
  • MoS2 inserted-layer Ti3C2 lithium ion battery negative electrode material and preparation method thereof
  • MoS2 inserted-layer Ti3C2 lithium ion battery negative electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Put Ti 3 AlC 2 Add 0.05 grams per milliliter of solution to a 49% hydrofluoric acid solution, stir at room temperature for 24 hours, then centrifuge the mixed solution to precipitate, and rinse the precipitate with deionized water 7 times until rinsed The pH value of the solution of the precipitate reaches 5.5, and then the obtained precipitate is placed in a vacuum drying box and dried at 80 ° C for 12 hours to obtain Ti. 3 C 2 powder;

[0033] (2) first, sodium molybdate dihydrate is added to the ethanol solution according to the ratio of adding 0.00022 grams per milliliter of solution, and after being completely dissolved, the Ti obtained in step (1) is added according to the ratio of adding 0.01428 grams per milliliter of solution. 3 C 2 powder, stir evenly; finally, add L-cysteine ​​at a rate of 0.00022 g per ml of solution, stir evenly, and ultrasonically disperse for 1 hour to promote the solution to enter Ti 3 C 2 between layers;

[0034] The above mi...

Embodiment 2

[0037] (1) Put Ti 3 AlC 2 Add 0.05 grams per milliliter of solution to a 49% hydrofluoric acid solution, stir at room temperature for 24 hours, then centrifuge the mixed solution to precipitate, and rinse the precipitate with deionized water 7 times until rinsed The pH value of the solution of the precipitate reaches 5.5, and then the obtained precipitate is placed in a vacuum drying box and dried at 80 ° C for 12 hours to obtain Ti. 3 C 2 powder;

[0038] (2) firstly molybdenum trioxide was added to the ethanol solution according to the ratio of adding 0.00013 grams per milliliter of solution, and after being completely dissolved, the Ti obtained in step (1) was added in the ratio of adding 0.01428 grams per milliliter of solution. 3 C 2 powder, stir evenly; finally, add thioacetamide at a rate of 0.00014 grams per milliliter of solution, stir evenly, and ultrasonically disperse for 1 hour to promote the solution to enter the Ti 3 C 2 between layers;

[0039] The above...

Embodiment 3

[0042] (1) Put Ti 3 AlC 2 Add 0.05 grams per milliliter of solution to a 49% hydrofluoric acid solution, stir at room temperature for 24 hours, then centrifuge the mixed solution to precipitate, and rinse the precipitate with deionized water 7 times until rinsed The pH value of the solution of the precipitate reaches 5.5, and then the obtained precipitate is placed in a vacuum drying box and dried at 80 ° C for 12 hours to obtain Ti. 3 C 2 powder;

[0043] (2) first add ammonium molybdate tetrahydrate to the ethanol solution according to the ratio of adding 0.00016 grams per milliliter of solution, after being completely dissolved, then add the Ti obtained in step (1) according to the ratio of adding 0.01428 grams per milliliter of solution 3 C 2 powder, stir evenly; finally, add thiourea at a rate of 0.00014 grams per milliliter of solution, stir evenly, and ultrasonically disperse for 1 hour to promote the solution into Ti 3 C 2 between layers;

[0044] The above mixe...

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Abstract

The invention discloses a MoS2 inserted-layer Ti3C2 lithium ion battery negative electrode material and a preparation method thereof. A MoS2 inserted-layer Ti3C2 composite material is prepared by taking titanium aluminum carbide as a main raw material and employing different molybdenum sources and sulfur sources, and the mass percent of MoS2 after combination accounts for 1-50%. The initial discharge specific capacity of the MoS2 inserted-layer Ti3C2 lithium ion battery negative electrode material is 604.2mAh/g under 50mA/g, the capacity of a product is 153.3mAh/g under 500mA/g after circulation of 50 times, the interlayer distance is 1.2346 nanometers, the capacity is obviously improved, the interlayer distance is remarkably extended, and the preparation method is a modified method which is simple in process and low in cost, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular to a molybdenum disulfide (MoS 2 ) intercalated titanium carbide (Ti 3 C 2 ) Open conductive negative electrode material and preparation method thereof. Background technique [0002] The global crisis of non-renewable energy has made sustainable energy widely favored. As a safe and efficient new energy source, lithium-ion batteries are widely used in various fields. However, with the advancement of science and technology, the rapid development of electronic equipment and automobiles has put forward higher requirements for the performance of batteries. It is urgent to find or prepare better electrode materials to improve the comprehensive performance of batteries. [0003] Among many anode materials, transition metal carbides or nitrides have received more and more attention in recent years. This type of material is obtained by etching the "A" element layer in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/58H01M4/62H01M4/624H01M10/0525Y02E60/10
Inventor 郭瑞松郑梅王宝玉刘志超李福运
Owner TIANJIN UNIV
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