A kind of preparation method of metal organic compound negative electrode material

A technology of organic compounds and negative electrode materials, applied in battery electrodes, structural parts, electrical components, etc., can solve the problems of high average working voltage, poor cycle stability, complicated preparation methods, etc., and achieve low average working voltage, low cost, and easy preparation The effect of simple method

Active Publication Date: 2020-07-03
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] Aiming at the problems of transition metal and its oxide anode materials in the research and application of lithium-ion batteries, such as poor cycle stability, poor rate performance, large irreversible capacity, complex preparation methods, low efficiency and high cost, Lithium titanate and titanium dioxide anode theory and For the problems of low actual capacity and high average working voltage, the present invention provides a metal organic compound negative electrode material and its preparation method. The metal organic compound can solve the problems of low theoretical and practical capacity and high average working voltage of lithium titanate and titanium dioxide negative electrodes. At the same time, it overcomes the problems of poor cycle stability, poor rate performance, complex preparation methods, low efficiency and high cost of transition metals and their oxide anode materials, and has great industrial application value.

Method used

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  • A kind of preparation method of metal organic compound negative electrode material
  • A kind of preparation method of metal organic compound negative electrode material
  • A kind of preparation method of metal organic compound negative electrode material

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Embodiment 1

[0029] The invention relates to a metal-organic compound negative electrode material and a preparation method thereof, belonging to a novel high-capacity, long-life power type, high energy density, and high power density lithium-ion battery metal-organic compound negative electrode material and a low-cost large-scale one-time preparation method thereof.

[0030] The technical scheme of the present invention utilizes metal inorganic salt or organic salt as metal source, uses ethylene glycol, propylene glycol, butanediol and their derivative solvents and organic component sources, and then prepares nanostructure metal organic complex negative electrode material through solvothermal reaction once . Its preparation steps are as follows:

[0031] (1) weigh 0.02mol bismuth nitrate, measure 0.02mol tetrabutyl titanate;

[0032] (2) Measure 100ml ethylene glycol;

[0033] (3) Gradually add the weighed bismuth nitrate and tetrabutyl titanate to the measured ethylene glycol with the a...

Embodiment 2

[0038](1) Weigh 0.01mol antimony acetate, measure 0.005mol tetrabutyl titanate;

[0039] (2) Measure 100ml ethylene glycol;

[0040] (3) Gradually add the weighed antimony acetate and tetrabutyl titanate into the measured ethylene glycol with the assistance of magnetic stirring, stir at a constant speed to completely dissolve and then continue stirring for 1 hour to obtain 0.15molL -1 Metal salt glycol solution;

[0041] (4) 0.15molL prepared in step 3 -1 The metal glycol solution is transferred to a polytetrafluoroethylene container and sealed in a stainless steel solvothermal reaction kettle for solvothermal reaction;

[0042] (5) Place the reaction kettle in a heating furnace, and conduct a solvothermal reaction at 150° C. for 16 hours;

[0043] (6) Wash the solvothermal product obtained in step 5 with a large amount of ethanol for 6 times, and dry it at 90° C. to finally obtain a pure-phase antimony titanium glycol (SbTiEG) metal organic compound negative electrode mate...

Embodiment 3

[0045] (1) weigh 0.01mol tin dichloride, measure 0.01mol tetrabutyl titanate;

[0046] (2) Measure 100ml ethylene glycol;

[0047] (3) Gradually add the weighed tin dichloride and tetrabutyl titanate to the measured ethylene glycol with the assistance of magnetic stirring, stir at a constant speed to completely dissolve and then continue stirring for 2 hours to obtain 0.2molL - 1 Metal salt glycol solution;

[0048] (4) 0.2molL- 1 The metal glycol solution is transferred to a polytetrafluoroethylene container and sealed in a stainless steel solvothermal reaction kettle for solvothermal reaction;

[0049] (5) Place the reaction kettle in a heating furnace, and conduct a solvothermal reaction at 120° C. for 6 hours;

[0050] (6) Wash the solvothermal product obtained in step 5 with a large amount of ethanol three times, and dry it at 90° C. to finally obtain a pure-phase tin-titanium glycol (SnTiEG) metal organic compound negative electrode material. The obtained SnTiEG is ...

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Abstract

The invention discloses a preparation method of a metal organic compound negative electrode material, and belongs to the field of a preparation method of the lithium ion battery negative electrode material. The metal organic compound negative electrode material is a compound formed by polyhydric metal irons and glycol in solvent heat environment; the metal inorganic salt or metal organic salt is used as reaction raw materials and polyhydric metal sources; glycol, propanediol and the like are used as solvents and complexing agents; then, the polyhydric metal organic compound nanometer structure negative electrode material is obtained through disposable preparation via the solvent thermal reaction. The metal organic compound negative electrode material has the advantages of high volume, low average work voltage, good rate capability, good circulation stability and the like. The preparation method is simple and convenient, and is suitable for industrial preparation; the raw materials are cheap and can be easily obtained; the huge industrial application values are realized.

Description

technical field [0001] The invention belongs to the field of preparation methods of negative electrode materials of lithium ion batteries, and more specifically relates to a preparation method of metal organic compound negative electrode materials. Background technique [0002] In recent years, the smog problem caused by coal-fired power generation, coal-fired heating, fuel-fired vehicles and oil refining industry has become more and more serious, and the massive exploitation of shale gas caused by the fossil energy crisis has also brought great harm to the earth's atmosphere and marine environment. Human beings are increasingly inclined to use environmentally friendly new energy technologies such as hydropower, solar energy, wind energy, biomass energy and tidal energy to obtain energy. However, since the power generation of hydropower, solar energy, wind energy and tidal energy changes with the change of the power generation environment, it is extremely unstable and cannot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/60
CPCH01M4/36H01M4/60H01M4/602Y02E60/10
Inventor 黄镇东陆昊方言武柏玲马延文冯晓苗刘瑞卿李盼林秀婧李谊
Owner NANJING UNIV OF POSTS & TELECOMM
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