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Preparation method of ultrathin carbon-coated tin dioxide nano composite material

A nanocomposite material, tin dioxide technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of electrode materials, cycle performance and high discharge capacity, etc., to shorten the diffusion Distance, excellent magnification performance, effect of improving magnification performance

Inactive Publication Date: 2020-10-13
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

Although this method can alleviate the volume change of tin dioxide-based composite materials during charge and discharge to a certain extent, it cannot solve the problem of stable cycle performance and high discharge capacity of electrode materials under high rate charge and discharge.

Method used

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  • Preparation method of ultrathin carbon-coated tin dioxide nano composite material
  • Preparation method of ultrathin carbon-coated tin dioxide nano composite material
  • Preparation method of ultrathin carbon-coated tin dioxide nano composite material

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Embodiment Construction

[0014] The preparation method of ultra-thin carbon-coated tin dioxide nanocomposite material, the specific steps are as follows:

[0015] Weigh 0.018mol of tin tetrachloride, 1mol of glucose and 3mg of naphthalene dissolved in 60mL of deionized water, then add 0.8mL of hydrochloric acid, stir magnetically for 30min, put the resulting mixed solution in a kettle, put it in a blast drying oven at 180°C for water Thermal reaction, the reaction time is controlled at 12h. After the hydrothermal reaction product is centrifugally cleaned, it is placed in a blast drying oven for drying.

[0016] Then, the product obtained by the hydrothermal reaction was placed in a tube furnace, heat-treated in a nitrogen atmosphere, heated to 500°C at a heating rate of 5°C / min, and held for 4h, thereby obtaining an ultra-thin carbon-coated tin dioxide nanocomposite material .

[0017] Research results of ultra-thin carbon-coated tin dioxide nanocomposites:

[0018] (1) Material structure analysis ...

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Abstract

The invention discloses a preparation method of an ultrathin carbon-coated tin dioxide nano composite material, which comprises the following steps: 1. dissolving a carbon source, a tin source and naphthalene in a certain ratio in deionized water, adding a proper amount of hydrochloric acid to regulate the pH value, and carrying out hydrothermal reaction on the mixed solution; and 2, calcining a product obtained by the hydrothermal reaction in a tubular furnace in an argon atmosphere to obtain the ultrathin carbon-coated tin dioxide nano composite material. The ultrathin carbon-coated stannicoxide nano composite material prepared by the invention has good cycling stability, excellent rate capability and high specific discharge capacity as a lithium ion negative electrode material.

Description

technical field [0001] The invention relates to the field of preparation of lithium-ion battery electrode materials, and specifically provides a simple preparation method for an ultra-thin carbon-coated tin dioxide nanometer negative electrode material. Background technique [0002] Lithium-ion batteries are widely used in portable electronic devices and other fields due to their significant advantages, and are gradually developing into high-power electric vehicles, large-scale energy storage power stations, and smart grids. Therefore, the performance demands on Li-ion batteries are increasing day by day. The electrode material is the most important component of lithium-ion batteries, and its structure and properties determine the core indicators of lithium-ion batteries such as capacity, safety, rate performance, and cycle stability. Therefore, there is an urgent need to develop new electrode materials for lithium-ion batteries that meet the requirements of high energy, hi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/485H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/485H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 赵永男高海燕黄志强
Owner TIANJIN POLYTECHNIC UNIV
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