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Flaky tin disulfide and preparation method and application thereof

A tin disulfide, flake technology, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., can solve the problems of cycle stability and poor rate performance, and achieve improved electrochemical performance, good application value, and grain size big effect

Inactive Publication Date: 2021-08-03
HUNAN INST OF TECH
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  • Abstract
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Problems solved by technology

However, most existing SnS 2 When used as a base material for lithium-ion batteries or sodium-ion batteries, it is poor in cycle stability and rate performance

Method used

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  • Flaky tin disulfide and preparation method and application thereof
  • Flaky tin disulfide and preparation method and application thereof
  • Flaky tin disulfide and preparation method and application thereof

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preparation example Construction

[0026] 1. Preparation of flaky tin disulfide.

[0027] like figure 1 As shown, the preparation process includes the following steps:

[0028] (1) Weigh 0.3949g of stannous chloride dihydrate (SnCl 2 ·2H 2 O) and 1.9722 g of thioacetamide (CH 3 CSNH 2 ) in a clean beaker, then add 35 ml of deionized water, and stir for about 30 minutes to mix thoroughly to obtain a mixed solution.

[0029] (2) Add an appropriate amount of ammonia water to the mixture to adjust the pH of the mixture to 8~9.

[0030] (3) Transfer the mixed solution after adjusting the pH value to an autoclave with a volume of 50ml, seal it and place it in an oven at 120°C for about 6 hours, until the reaction ends, and then take it out after the autoclave is cooled to room temperature. The reacted product is obtained.

[0031] (4) The product is centrifuged and washed three times with absolute ethanol, and the product is centrifuged and washed three times with deionized water to obtain the washed product, ...

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Abstract

The invention discloses flaky tin disulfide and a preparation method and application thereof, which relate to the technical field of battery electrode materials. The preparation method comprises the following steps of mixing a proper amount of stannous chloride dehydrate and thioacetamide, adding a proper amount of deionized water, and stirring to fully mix to obtain a mixed solution, adding a proper amount of ammonia water into the mixed solution to adjust the pH value of the mixed solution to 8-9, transferring the mixed solution with the adjusted pH value to a reaction kettle, sealing the reaction kettle, performing hydrothermal treatment at the temperature of 110-130 DEG C until the reaction is finished, and taking out the reaction kettle after the reaction kettle is cooled to room temperature to obtain a reacted product, and washing the product, and then drying to obtain the yellow powdery flaky tin disulfide. When the prepared flaky tin disulfide is applied to a negative electrode of a lithium ion or sodium ion battery, the stability and the rate capability of the battery can be improved.

Description

technical field [0001] The invention relates to the technical field of battery electrode materials, in particular to a sheet-like tin disulfide and a preparation method and application thereof. Background technique [0002] With the rapid development of modern society, the energy crisis has gradually become a major issue that has attracted global attention. As the main energy storage device, rechargeable lithium-ion batteries have become the most widely used batteries in modern digital products such as mobile phones and notebook computers due to their high energy density, small self-discharge, no memory effect, and long cycle life. It is rapidly moving from electronics to electric vehicles, renewable energy and many new industries. The theoretical capacity of industrialized graphite anode materials is relatively low, generally 372 mAh g -1 , which cannot meet the high energy density required for large-scale electric vehicles (EV / PHEV) and large-scale energy storage systems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/00H01M4/58H01M10/0525H01M10/054B82Y40/00B82Y30/00
CPCC01G19/00H01M4/5815H01M10/0525H01M10/054B82Y40/00B82Y30/00C01P2004/24C01P2006/60C01P2006/40Y02E60/10
Inventor 张睿智肖新宇尹岚黄靖栋
Owner HUNAN INST OF TECH
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