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SnO2/C nanometer solid spheres acting as negative electrode of lithium ion battery and preparation method of SnO2/C nanometer solid spheres

A technology of lithium-ion batteries and solid spheres, applied in battery electrodes, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as complex preparation processes, and achieve the effect of simple preparation methods and high energy density

Active Publication Date: 2017-07-11
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the above SnO 2 The complex preparation process of / C composites has always been a difficult problem to break through

Method used

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  • SnO2/C nanometer solid spheres acting as negative electrode of lithium ion battery and preparation method of SnO2/C nanometer solid spheres
  • SnO2/C nanometer solid spheres acting as negative electrode of lithium ion battery and preparation method of SnO2/C nanometer solid spheres
  • SnO2/C nanometer solid spheres acting as negative electrode of lithium ion battery and preparation method of SnO2/C nanometer solid spheres

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preparation example Construction

[0033] The invention provides a kind of SnO as negative electrode of lithium ion battery 2 The preparation method of / C nanometer solid ball, comprises the following steps:

[0034] A) performing a crosslinking reaction with the tin source compound and the crosslinking agent in the presence of a catalyst to obtain a crosslinked polymer nanometer solid sphere;

[0035] B) carbonizing the cross-linked polymer nanometer solid spheres to obtain SnO 2 / C nanometer solid ball.

[0036] In the invention, firstly, the tin source compound and the crosslinking agent are subjected to crosslinking reaction in the presence of a catalyst to obtain crosslinked polymer nanometer solid balls.

[0037] In the present invention, the tin source compound is selected from one or more of diphenyltin, triphenyltin, tetraphenyltin, diphenyltin halide, triphenyltin halide and tetraphenyltin halide species, preferably diphenyltin, triphenyltin, tetraphenyltin, diphenyltin chloride, triphenyltin chlor...

Embodiment 1

[0055] (1) Add 80 mL of 1,2-dichloroethane as a solvent into a 250 mL three-necked flask, and place the flask in a water bath at 60°C.

[0056] (2) Weigh 2g of triphenyltin chloride into the flask, and weigh 4g of catalyst anhydrous aluminum chloride after it is completely dissolved.

[0057] (3) Using dimethoxymethane as the cross-linking agent for this reaction, pipette 4 mL into the flask with a syringe. The triphenyltin chloride and dimethoxymethane were cross-linked at 60° C. for 15 minutes to obtain cross-linked solid polymer nanospheres of triphenyltin chloride and dimethoxymethane.

[0058] (4) The reaction solution obtained in step (3) was filtered and washed three times with deionized water and alcohol respectively to obtain a yellow powder. Dry the yellow powder in a drying oven at 80° C. for 12 hours to obtain dry cross-linked polymer nano-solid spheres.

[0059] Carry out infrared spectrum detection to triphenyl tin chloride and the obtained cross-linked macromo...

Embodiment 2

[0070] (1) Add 80 mL of 1,2-dichloroethane as a solvent into a 250 mL three-necked flask, and place the flask in a water bath at 60°C.

[0071] (2) Weigh 2g of triphenyltin chloride into the flask, and weigh 4g of catalyst anhydrous aluminum chloride after it is completely dissolved.

[0072] (3) Using dimethoxymethane as the cross-linking agent for this reaction, pipette 4 mL into the flask with a syringe. The triphenyltin chloride and dimethoxymethane were cross-linked at 60° C. for 15 minutes to obtain cross-linked solid polymer nanospheres of triphenyltin chloride and dimethoxymethane.

[0073] (4) The reaction solution obtained in step (3) was filtered and washed three times with deionized water and alcohol respectively to obtain a yellow powder. The yellow powder was dried in an oven at 80°C for 12 h.

[0074](5) The cross-linked polymer spheres prepared in step (4) were heated from 50 °C to 700 °C at a heating rate of 2 °C / min, and then kept for 1 h for carbonization ...

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Abstract

The invention provides a preparation method of SnO2 / C nanometer solid spheres acting as a negative electrode of a lithium ion battery. The preparation method comprises the following steps: A) performing a crosslinking reaction on a tin source compound and a cross-linking agent in the presence of a catalyst to obtain crosslinked high-molecular nanometer solid spheres; and B) carbonizing the crosslinked high-molecular nanometer solid spheres to obtain SnO2 / C nanometer solid spheres. The provided preparation method is simple, and the obtained SnO2 / C nanometer composite is high in energy density and power density and stable in cycle performance.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a SnO2 / C nanometer solid ball used as a lithium ion battery negative electrode and a preparation method thereof. Background technique [0002] With the development of electronic devices and electric vehicles, lithium-ion batteries are playing an increasingly important role in our daily life due to their high energy density and long cycle life. In order to meet the increasing demand for lithium-ion batteries, a lot of work has been done to find new anode materials with high capacity and excellent cycle performance. Graphite has become the most classic anode material due to its special layer structure, but because its theoretical capacity is only 372mAh g -1 , which is far from meeting the current needs. To solve this problem, many studies have been carried out on Si-based materials, metal alloys, metal oxides and metal chalcogenides. Because tin dioxid...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/485H01M4/628H01M10/0525Y02E60/10
Inventor 李柳青张海燕李争晖钟威豪
Owner GUANGDONG UNIV OF TECH
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