Preparation method and application of sulfur-doped tin disulfide/tin dioxide@C/rGO material

A technology of tin disulfide and tin dioxide, which is applied in the repair/maintenance of secondary batteries, secondary batteries, electrochemical generators, etc., can solve problems such as electrode pulverization failure, improve conductivity, and increase electron-absorbing ability , to promote the effect of stable generation

Active Publication Date: 2021-04-02
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, SnS 2 When used alone as the negative electrode of lithium-ion batteries, there is still a huge volume expansion, which will also cause SnS 2 Electrode pulverization failure

Method used

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  • Preparation method and application of sulfur-doped tin disulfide/tin dioxide@C/rGO material
  • Preparation method and application of sulfur-doped tin disulfide/tin dioxide@C/rGO material
  • Preparation method and application of sulfur-doped tin disulfide/tin dioxide@C/rGO material

Examples

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Embodiment 1

[0026] All raw materials used in Example 1 are commercially available products.

[0027] Example 1

[0028] A sulfur-doped SnS 2 / SnO 2 @C / rGO nanocomposite preparation method, the specific steps are:

[0029] (1) Weigh 0.5g SnCl 2 Dissolve in 0.4mL of concentrated HCl (mass concentration: 37%) and stir evenly to form SnCl 2 acid;

[0030] (2) 0.4mL of SnCl 2 Add the acid solution to 343mL of distilled water, and at the same time add 267.5mg of L-ascorbic acid, stir magnetically until it is completely dissolved; finally add 107mL of GO colloid (concentration: 5mg / mL) and 50mL of thiourea solution (50mg / mL) to the above solution , stir evenly to form a mixed solution A;

[0031](3) Place the solution A obtained in step (2) in a water bath at 80°C, and evaporate the solution A under negative pressure at a pressure of -0.1Pa. After the solution A evaporates to 100mL, transfer the formed gel to the hydrothermal kettle at 1°C·min -1 The heating rate is at 180°C, hydrotherm...

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Abstract

The invention discloses a preparation method of a sulfur-doped tin disulfide/tin dioxide@C/rGO material and application of the sulfur-doped tin disulfide/tin dioxide@C/rGO material in a lithium ion battery. The preparation method comprises the following steps: dissolving SnCl2 into concentrated HCl to form a stable SnCl2 solution; mixing a SnCl2 solution, GO colloid, thiourea, L-ascorbic acid andthe like, and performing stirring to form a uniform mixed solution; carrying out water bath negative pressure evaporation on the mixed solution, and then carrying out hydrothermal treatment to obtaina precursor; after a hydrothermal kettle is cooled to room temperature, centrifuging the precursor, and sequentially washing the obtained precipitate with water and alcohol; and transferring the precipitate into the hydrothermal kettle again, adding H2O2, carrying out hydrothermal treatment again, cooling a sample in the kettle to room temperature, performing centrifuging, performing washing withwater, performing washing with alcohol, and carrying out freeze drying on the obtained precipitate to obtain the sulfur-doped tin disulfide/tin dioxide@C/rGO material. The preparation method is simpleto operate, environment-friendly and low in energy consumption, and the prepared nano composite electrode material has excellent electrochemical performance.

Description

technical field [0001] The invention relates to a sulfur-doped SnS 2 / SnO 2 The preparation method and application of @C / rGO electrodes belong to the technical field of new energy materials. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long life, and low self-discharge. These advantages make lithium-ion batteries widely used in portable electronic products. In recent years, with the development of society, environmental and energy issues have become increasingly prominent; this has made the application of lithium-ion batteries more concentrated in electric vehicles and smart grids, which put forward higher requirements for their energy density and power density. However, the theoretical lithium storage capacity of commercial anode material graphite is limited (372mAh / g), which is far from meeting the requirements of high energy and high power density. Therefore, the development of high-capacity lithium-ion battery anode m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/58H01M10/0525H01M10/42
CPCH01M4/366H01M4/387H01M4/48H01M4/5815H01M10/0525H01M10/4235Y02E60/10
Inventor 金双玲古飞蛟钱晨亮贾培宇韦家卿孙学乾韩奇杭加旺王晓瑞金鸣林张睿
Owner SHANGHAI INST OF TECH
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