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A kind of antimony trioxide applied to negative electrode material of lithium ion battery and preparation method thereof

A technology of antimony trioxide and lithium-ion batteries, applied in battery electrodes, chemical instruments and methods, antimony oxide/antimony hydroxide/antimony oxoacids, etc., can solve irreversible battery capacity loss, fragile electrodes, Improve the electrochemical performance, avoid agglomeration, and promote dispersion

Inactive Publication Date: 2021-01-22
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to overcome the above-mentioned defects, and provide a kind of antimony trioxide applied to the negative electrode material of lithium ion battery, which has the advantages of unique appearance, good uniformity and excellent electrochemical performance, and solves the problem that the electrode is easily broken and causes Severe decrease in cycle stability and loss of irreversible battery capacity

Method used

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  • A kind of antimony trioxide applied to negative electrode material of lithium ion battery and preparation method thereof
  • A kind of antimony trioxide applied to negative electrode material of lithium ion battery and preparation method thereof
  • A kind of antimony trioxide applied to negative electrode material of lithium ion battery and preparation method thereof

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Embodiment 1

[0041] This embodiment provides a method for preparing antimony trioxide applied to the negative electrode material of lithium-ion batteries, which specifically includes the following steps:

[0042]S1. Dissolve antimony trichloride in a mixed solution of absolute ethanol and methanol with a volume ratio of 7:3 under a heat-collecting magnetic stirrer in a constant temperature water bath at 10°C, and stir the solution at 1000rpm for 15 minutes with magnetic force to make the solution It is a colorless homogeneous liquid with a constant temperature of 10°C and a concentration of 0.0625mol / L; then weigh 2-methylimidazole and dissolve it in the same amount of 7:3 mixed solution of absolute ethanol and methanol with a concentration of 0.25 mol / L, water bath constant temperature 10°C, magnetic stirring to dissolve into a colorless and uniform liquid;

[0043] Quickly pour the 2-methylimidazole solution into the antimony trichloride solution, you can see a large amount of white susp...

Embodiment 2

[0047] S1. Under the heat-collecting magnetic stirrer in a water bath at 30°C, dissolve antimony trichloride in a mixed solution of absolute ethanol and methanol with a volume ratio of 1:1, and stir at 1000 rpm for 15 minutes to make the solution appear Colorless homogeneous liquid, the temperature is constant at 30°C, the concentration is 0.0625mol / L; then weigh 2-methylimidazole and dissolve it in the same amount of 1:1 mixed solution of absolute ethanol and methanol, the concentration is 0.25mol / L, water bath constant temperature 30°C, magnetic stirring to dissolve into a colorless and uniform liquid;

[0048] Pour the 2-methylimidazole solution into the antimony trichloride solution quickly, you can see a large amount of white suspension formed, seal it immediately; keep the temperature at 30°C, keep stirring for 24 hours, stop the reaction, and get the white suspension .

[0049] S2. Filter the suspension obtained in step S1, wash the filter residue three times with dis...

Embodiment 3

[0052] S1. Dissolve antimony trichloride in a mixed solution of absolute ethanol and methanol with a volume ratio of 3:7 under a heat-collecting magnetic stirrer in a water bath at 50°C, and stir at 1000 rpm for 15 minutes to make the solution colorless Uniform liquid, the temperature is constant at 50°C, the concentration is 0.0625mol / L; then weigh 2-methylimidazole and dissolve it in the same amount of 3:7 mixed solution of absolute ethanol and methanol, the concentration is 0.25mol / L , water bath constant temperature 50 ℃, magnetic stirring to dissolve into a colorless uniform liquid; quickly pour 2-methylimidazole solution into antimony trichloride solution, you can see a large amount of white suspension, seal it immediately; keep the temperature at 50 ℃, after 24 hours of continuous stirring, the reaction was stopped, and a white suspension was obtained.

[0053] S2. Filter the suspension obtained in step S1, wash the filter residue three times with distilled water, then ...

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Abstract

The invention relates to the field of new energy materials, in particular to antimony trioxide applied to negative electrode materials for lithium ion batteries and a method for preparing the antimonytrioxide. The antimony trioxide is micron-size silver-like ear-shaped antimony trioxide. Metal-organic framework structures [Sb-MOFs] intermediates with porous structures are formed by antimony saltand nitrogen-containing heterocyclic ligands, and the micron-size silver-like ear-shaped antimony trioxide further can be prepared. The antimony trioxide and the method have the advantages that the contact areas of electrolyte and a negative electrode material can be efficiently enlarged when the antimony trioxide with silver-like ear-shaped structures is used as the negative electrode material, the lithium ion transmission efficiency can be enhanced, and the antimony trioxide is excellent in electrochemical performance; the method is simple, green and environmentally friendly, is low in costand has an excellent application prospect.

Description

technical field [0001] The invention relates to the field of new energy materials, in particular to antimony trioxide applied to lithium-ion battery negative electrode materials and a preparation method thereof. Background technique [0002] With the rapid development of society, the demand for energy is increasing, the mining of fossil energy such as coal, oil, and natural gas is gradually dying, and people's environmental protection requirements are becoming increasingly stringent. It is imminent to develop green energy. Because of its high energy density, high working voltage, low self-discharge, good safety performance, small size, and less environmental pollution, lithium-ion batteries are one of the most researched chemical power systems today and have good development prospects. At present, the negative electrode material widely used in lithium-ion batteries is graphite. Its theoretical capacity is 372mAh / g, and the actual capacity is 340-360mAh / g, which is close to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G30/00H01M4/48H01M10/0525
CPCC01G30/005C01P2002/72C01P2004/03C01P2004/04C01P2004/61H01M4/483H01M10/0525Y02E60/10
Inventor 陈宪宏谭玉明陈晗朱裔荣
Owner HUNAN UNIV OF TECH
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