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A kind of preparation method of tin sulfide composite negative electrode material

A technology of stannous sulfide and negative electrode materials, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., can solve problems such as poor cycle life and rapid capacity decay, and achieve improved cycle life, low preparation cost, and simple preparation process Effect

Active Publication Date: 2022-02-11
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the huge volume change of tin-based materials during charging and discharging, the capacity decays rapidly and the cycle life is poor.

Method used

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  • A kind of preparation method of tin sulfide composite negative electrode material
  • A kind of preparation method of tin sulfide composite negative electrode material
  • A kind of preparation method of tin sulfide composite negative electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A preparation method for a tin sulfide composite negative electrode material, comprising the following steps:

[0031] (1) Get stannous sulfide and carbon nanotubes, join them in the sodium alginate aqueous solution, place them in a ball mill, and obtain a uniformly dispersed mixed solution after ball milling;

[0032] (2) adding the above mixed solution dropwise into the metal salt solution, stirring evenly to obtain the hydrogel of the mixed solution;

[0033] (3) Take the hydrogel of the above mixed solution, mix it with the silicon-coated modified precursor, stir evenly, wash, filter, dry, roast, and cool to obtain the stannous sulfide composite negative electrode material.

[0034] The concentration of the sodium alginate aqueous solution is 1 wt%.

[0035] The weight ratio of the stannous sulfide to carbon nanotubes is 1:950.

[0036] The metal salt is ferrous sulfate, and the concentration of the metal salt solution is 3 wt%.

[0037] The silicon-coated modifi...

Embodiment 2

[0045] A preparation method for a tin sulfide composite negative electrode material, comprising the following steps:

[0046] (1) Get stannous sulfide and carbon nanotubes, join them in the sodium alginate aqueous solution, place them in a ball mill, and obtain a uniformly dispersed mixed solution after ball milling;

[0047] (2) adding the above mixed solution dropwise into the metal salt solution, stirring evenly to obtain the hydrogel of the mixed solution;

[0048] (3) Take the hydrogel of the above mixed solution, mix it with the silicon-coated modified precursor, stir evenly, wash, filter, dry, roast, and cool to obtain the stannous sulfide composite negative electrode material.

[0049] The concentration of the sodium alginate aqueous solution is 2wt%.

[0050] The weight ratio of the stannous sulfide to carbon nanotubes is 1:1000.

[0051] The metal salt is one of nickel sulfate, and the concentration of the metal salt solution is 5 wt%.

[0052] The silicon-coated ...

Embodiment 3

[0060] A preparation method for a tin sulfide composite negative electrode material, comprising the following steps:

[0061] (1) Get stannous sulfide and carbon nanotubes, join them in the sodium alginate aqueous solution, place them in a ball mill, and obtain a uniformly dispersed mixed solution after ball milling;

[0062] (2) adding the above mixed solution dropwise into the metal salt solution, stirring evenly to obtain the hydrogel of the mixed solution;

[0063] (3) Take the hydrogel of the above mixed solution, mix it with the silicon-coated modified precursor, stir evenly, wash, filter, dry, roast, and cool to obtain the stannous sulfide composite negative electrode material.

[0064] The concentration of the sodium alginate aqueous solution is 0.5wt%-2wt%.

[0065] The weight ratio of the stannous sulfide to carbon nanotubes is 1:900.

[0066] The metal salt is manganese sulfate, and the concentration of the metal salt solution is 1 wt%.

[0067] The silicon-coated ...

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Abstract

The invention discloses a method for preparing a stannous sulfide composite negative electrode material, which includes preparing a mixed solution, preparing a mixed solution hydrogel, and preparing a finished material. The method of the invention can effectively improve the cycle life of the stannous sulfide material, and the preparation cost is low. The preparation process is simple, and can also be extended to the production and preparation of other tin-based composite negative electrode materials.

Description

technical field [0001] The invention belongs to the field of negative electrode materials for lithium ion secondary batteries, and in particular relates to a preparation method of a tin sulfide composite negative electrode material. Background technique [0002] Due to the advantages of high energy density, high voltage, no memory effect, wide applicable temperature range and high cycle life, lithium-ion batteries have developed rapidly since their commercialization and are widely used in electronic products such as mobile phones and digital cameras. middle. With the continuous development of the new energy industry, lithium-ion batteries are also used in power tools, electric vehicles, energy storage, aerospace, and military industries. Different from lithium-ion batteries used in electronic equipment, lithium-ion batteries used in the field of new energy, especially electric vehicles, require high energy density, long cycle life, safety and reliability. [0003] In addit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00C01B32/158H01M4/36H01M4/58H01M4/62H01M10/0525
CPCC01G19/00C01B32/158H01M4/366H01M4/5815H01M4/628H01M10/0525C01P2004/03C01P2006/40Y02E60/10
Inventor 白薛魏爱佳何蕊张利辉刘振法
Owner ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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