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Preparation method of lithium ion battery cathode material SiOX-TiO2/C

A technology for lithium-ion batteries and negative electrode materials, applied to battery electrodes, secondary batteries, circuits, etc., can solve the problems of high raw material prices, low yields, and complicated preparation methods, and achieve simple preparation methods, high yields, and improved The effect of ground conductivity

Active Publication Date: 2016-05-18
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] The invention provides a lithium ion battery negative electrode material SiO x -TiO 2 The preparation method of / C improves the electronic conductance of the material, improves the electrochemical capacity of the material, improves the electrochemical stability of the material, and improves the ionic conductance of the material, which solves the problem of high raw material prices, complicated preparation methods, and low yield. low problem

Method used

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  • Preparation method of lithium ion battery cathode material SiOX-TiO2/C
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  • Preparation method of lithium ion battery cathode material SiOX-TiO2/C

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preparation example Construction

[0026] A new type of anode material SiO for lithium ion battery provided by an embodiment of the present invention x -TiO 2 The preparation method of / C can include:

[0027] (1) Weigh the analytically pure organic silicon source, organic titanium source and organic carbon source according to a certain molar ratio; dissolve the organic silicon source in a mixture of deionized water and absolute ethanol and add a small amount of glacial acetic acid as a catalyst, and stir After a period of time, adjust the pH of the solution to the alkaline range with ammonia to obtain mixed solution A; dissolve the organic titanium source in absolute ethanol and stir for a period of time to obtain mixed solution B;

[0028] (2) Add the mixed solution B to the mixed solution A, and after stirring for a period of time, let it stand for a period of time at room temperature to obtain a colloidal mixed solution;

[0029] (3) After mixing the colloidal mixture with the organic carbon source, perform mechan...

Embodiment 1

[0042] Weigh 12g of trimethylsilanol and dissolve it in a mixed solution of 9ml of absolute ethanol and 3ml of deionized water, and then add 1ml of glacial acetic acid as a catalyst. After stirring for a while, add aqueous ammonia solution to adjust the pH of the solution to 7 to obtain a mixture Liquid A. Weigh 3 g of tetraisopropyl titanium, dissolve it in 6 ml of absolute ethanol, and stir for a while to obtain mixed solution B. Add the mixed solution B to the mixed solution A, stir for a while, and then stand at room temperature for 10 hours. After mixing the sucrose aqueous solution containing 18.3 g of sucrose with the static sol, it is placed in a ball milling tank for mechanical ball milling, and then the ball milling stock solution is dried to obtain a precursor. The precursor was placed in a quartz crucible, under an inert protective atmosphere of Ar, the temperature was set to 700℃, and the holding time was 1h for treatment. After the reaction, it was cooled with th...

Embodiment 2

[0044] Weigh 12g of trimethylsilanol and dissolve it in a mixed solution of 36ml of absolute ethanol and 12ml of deionized water, and then add 1ml of glacial acetic acid as a catalyst. After stirring for a while, add aqueous ammonia solution to adjust the pH of the solution to 10 to obtain a mixture Liquid A. Weigh 15.2 g of tetraisopropyl titanium and dissolve it in 30.4 ml of absolute ethanol, and stir for a while to obtain mixed solution B. Add the mixed solution B to the mixed solution A, and after stirring for a while, let it stand at room temperature for 40h. After mixing the sucrose aqueous solution containing 18.3 g of sucrose with the static sol, it is placed in a ball milling tank for mechanical ball milling, and then the ball milling stock solution is dried to obtain a precursor. The precursor is placed in an alumina crucible, under an inert protective atmosphere of Ar, the temperature is set to 1000 ℃, and the holding time is 5 hours for treatment. After the reacti...

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Abstract

The invention discloses a preparation method of a lithium ion battery cathode material SiOX-TiO2 / C. The preparation method comprises steps as follows: analytically pure organic silicon sources, organic titanium sources and organic carbon sources are weighed in a certain mole ratio; the organic silicon sources are dissolved in a mixed solution of deionized water and absolute ethyl alcohol and stirred, the pH of the solution is adjusted to be alkaline, and a mixed solution A is obtained; the organic titanium sources are dissolved in the absolute ethyl alcohol and stirred for a period of time, and a mixed solution B is obtained; the mixed solution B is added to the mixed solution A and left to stand at the room temperature after being stirred for a period of time, and a colloidal mixed solution is obtained; after the colloidal mixed solution is mixed with the organic carbon sources, mechanical ball-milling treatment is performed; the mixed solution after mechanical ball-milling treatment is dried, and a precursor is obtained; the precursor is put in a crucible and calcined under the protection of inert atmosphere, thermal insulation is performed for multiple hours, and a product is cooled to the room temperature with the furnace. Compared with the prior art, the cathode material prepared with the method has good rate performance, the raw materials are cheap, the preparation process is simple, and the yield is high.

Description

Technical field [0001] The invention belongs to the field of new materials and electrochemistry, and specifically relates to a lithium ion battery negative electrode material SiO x -TiO 2 / C method of preparation. technical background [0002] With the continuous development of human society and the continuous improvement of the economic level, the energy crisis and environmental pollution problems have become more prominent. The current rapid economic development is based on the large consumption of traditional non-renewable fossil mineral energy (coal, petroleum, etc.). The continuous consumption of traditional fossil energy brings environmental and climate problems (greenhouse effect, extreme climate, and urban life). Haze, etc.) and the increasing depletion of fossil and mineral energy sources have forced people to start looking for alternative new energy sources, such as solar energy, wind energy, tidal energy, nuclear energy and so on. However, for new energy sources, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525
CPCH01M4/366H01M4/48H01M4/625H01M10/0525Y02E60/10
Inventor 赵海雷李兆麟吕鹏鹏夏青张子佳王聪
Owner UNIV OF SCI & TECH BEIJING
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