A kind of graphene-based antimony sulfide negative electrode material and its preparation method and application

A technology of alkenyl antimony sulfide and negative electrode materials, which is applied in the field of electrochemistry, can solve problems such as deterioration of electrical integrity, capacity fading, film cracking, etc., and achieves the effect of good effect, low cost, simple and safe method

Active Publication Date: 2022-02-11
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cycling stability of emerging high-capacity sulfide electrodes is still a problem, and the lithiation process is accompanied by a large volume change, leading to film cracking, deterioration of electrical integrity, gradual capacity fading, and shortened lifetime.

Method used

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  • A kind of graphene-based antimony sulfide negative electrode material and its preparation method and application
  • A kind of graphene-based antimony sulfide negative electrode material and its preparation method and application
  • A kind of graphene-based antimony sulfide negative electrode material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The first step, preparation of antimony sulfide material:

[0051] (1) 0.25g SbCl 3 Add it into 30mL deionized water and stir well; then add 30mL ethylene glycol into the above solution and stir for 10min;

[0052] (2) Then 0.3g sodium borohydride (NaBH 4 ) was slowly added into the solution and stirred evenly, and then 0.75 g of polyvinylpyrrolidone (PVP) with a molecular weight of 300,000 was added into the solution until fully dissolved;

[0053] (3) Finally, pour the solution into the lining of a hydrothermal kettle containing sulfur powder for hydrothermal heating at a temperature of 160-200° C. for 12-24 hours.

[0054] The second step is to prepare graphene-based antimony sulfide negative electrode material:

[0055] (1) After hydrothermal completion, the resulting solution was washed with deionized water and then dried to obtain Sb 2 S 3 , the resulting Sb 2 S 3 and GO again with hydrothermal 180 ℃, 12h to get Sb 2 S 3 @RG composite material, finally fr...

Embodiment 2

[0059] This embodiment is basically the same as Embodiment 1, except that in this embodiment, in the first step (1), the amount of deionized water added is 25 mL.

Embodiment 3

[0061] This example is basically the same as Example 1, except that in this example, in the first step (1), the amount of deionized water added is 35 mL.

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Abstract

The invention relates to a graphene-based antimony sulfide negative electrode material and its preparation method and application. The preparation method comprises: (1) adding an antimony source into deionized water, stirring evenly, adding ethylene glycol and stirring to obtain a first solution; (2) sodium borohydride is added to the first solution obtained in step (1) and stirred evenly, then polyvinylpyrrolidone is added and fully dissolved to obtain the second solution; (3) the second solution obtained in step (2) Add it to the lining of the hydrothermal kettle containing sulfur powder for hydrothermal reaction. After the reaction is completed, the solid and liquid are separated, washed and dried to obtain Sb 2 S 3 ; (4) the Sb 2 S 3 Composite with GO by a hydrothermal method, followed by freeze-drying, to obtain the graphene-based antimony sulfide negative electrode material. Compared with the prior art, the invention has the advantages of simple process, mild conditions, low cost and the like, and exhibits excellent electrochemical performance as a lithium ion battery negative electrode.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and relates to a negative electrode material, in particular to a graphene-based antimony sulfide negative electrode material and a preparation method and application thereof. Background technique [0002] With the development and progress of the automobile industry, the sustainable development of human beings is facing great challenges. The combustion of non-renewable fuels releases various exhaust gases that cause various problems. Therefore, it is particularly important to seek renewable and sustainable resource energy storage devices. Among them, rechargeable batteries are economical, environmentally friendly, have high power, and long life. Compared with non-renewable energy sources, rechargeable batteries realize the sustainable utilization of energy. In particular, lithium-ion batteries and sodium-ion batteries are currently one of the most promising electrochemical energy storage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/0525
CPCH01M4/5815H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 韩生马健胡晓敏黄燕山孔玥李原婷陈宇凯王红星姜鹏飞
Owner SHANGHAI INST OF TECH
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