A kind of negative electrode material for sodium ion battery and preparation method thereof

A sodium-ion battery and negative electrode material technology, applied in the direction of battery electrodes, negative electrodes, nanotechnology for materials and surface science, etc., can solve the problems of poor cycle stability and insufficient specific capacity of negative electrode materials, and achieve a good cycle Stability, increase capacity, good dispersion effect

Active Publication Date: 2022-04-08
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a kind of negative electrode material and preparation method thereof for sodium-ion batteries, solve the existing problems based on SnO 2 Poor cycle stability and insufficient specific capacity of negative electrode materials

Method used

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  • A kind of negative electrode material for sodium ion battery and preparation method thereof
  • A kind of negative electrode material for sodium ion battery and preparation method thereof
  • A kind of negative electrode material for sodium ion battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1) Place the catalyst in a quartz boat, spread it evenly, place it in the heating tube of the device, and raise the temperature to 600 °C at a heating rate of 5 °C / min in a tube furnace filled with inert gas, turn off the inert gas, and Acetylene gas was fed at a rate of 100 mL / min. After 1 h of reaction, the acetylene gas was turned off, and an inert gas was introduced until cooled to room temperature to obtain carbon nanospheres.

[0028] 2) Weigh 0.62g of carbon nanospheres obtained in step 1) and 0.62g of SnCl 4 .5H 2 O powder was put into a sealed pulverizer and pulverized for 30 s to make the SnCl 4 .5H 2 O and nano carbon spheres were thoroughly mixed evenly. Then put the above mixture into a high-pressure hydrothermal reaction kettle, raise the temperature to 180°C at a rate of 2°C / min and keep it warm for 10 h. After cooling, wash it with a large amount of deionized water and absolute ethanol, and dry it under vacuum at 100°C for 12 h. , get NCSs / SnO 2 . ...

Embodiment 2

[0031]1) Place the catalyst in a quartz boat, spread it evenly, place it in the heating tube of the device, and raise the temperature to 600 °C at a heating rate of 5 °C / min in a tube furnace filled with inert gas, and turn off the inert gas to Acetylene gas was fed at a rate of 100 mL / min. After 1 h of reaction, the acetylene gas was turned off, and an inert gas was introduced until cooled to room temperature to obtain carbon nanospheres.

[0032] 2) Weigh 0.62g of carbon nanospheres obtained in step 1) and 0.62g of SnCl 4 .5H 2 O powder was put into a sealed pulverizer and pulverized for 30 s to make the SnCl 4 .5H 2 O and nano carbon spheres were thoroughly mixed evenly. Then put the above mixture into a high-pressure hydrothermal reaction kettle, raise the temperature to 140°C at a rate of 2°C / min and keep it for 10 h, after cooling, wash it with a large amount of deionized water and absolute ethanol, and dry it under vacuum at 100°C for 12 h , get NCSs / SnO 2 .

[00...

Embodiment 3

[0035] 1) Place the catalyst in a quartz boat, spread it evenly, place it in the heating tube of the device, and raise the temperature to 800°C at a heating rate of 6°C / min in a tube furnace filled with inert gas, and turn off the inert gas to Acetylene gas was fed at a rate of 100 mL / min. After 1 h of reaction, the acetylene gas was turned off, and an inert gas was introduced until cooled to room temperature to obtain carbon nanospheres.

[0036] 2) Weigh 0.62g of carbon nanospheres obtained in step 1) and 0.62g of SnCl 4 .5H 2 O powder was put into a sealed pulverizer and pulverized for 30 s to make the SnCl 4 .5H 2 O and nano carbon spheres were thoroughly mixed evenly. Then put the above mixture into a high-pressure hydrothermal reaction kettle, raise the temperature to 180°C at a rate of 5°C / min and keep it warm for 10 hours. After cooling, wash it with a large amount of deionized water and absolute ethanol, and dry it under vacuum at 100°C for 12 hours. , get NCSs / Sn...

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Abstract

The invention discloses a negative electrode material for a sodium ion battery and a preparation method thereof. Nano-carbon spheres are prepared by a CVD method, and nano-SnO is grown in situ. 2 , the SnO 2 In situ growth on nano carbon spheres, namely to obtain the negative electrode material. Due to the unique shape and structure of nano-carbon spheres, it provides more expansion space for nano-tin dioxide during charge and discharge, and the loaded nano-tin dioxide increases the specific capacity of nano-carbon spheres. The negative electrode material exhibits good specific capacity, cycle performance and rate performance in battery negative electrodes, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of sodium ion batteries, and in particular relates to a negative electrode material for sodium ion batteries and a preparation method thereof. Background technique [0002] With the gradual depletion of fossil energy, new energy represented by wind energy, solar energy, and tidal energy has attracted widespread attention from all over the world. These new energy sources have the characteristics of low utilization rate, intermittent, and difficult to connect to the grid for power generation. In order to make these clean and renewable new energy sources available on a large scale, the development of energy storage devices is imperative. Lithium-ion batteries have excellent electrochemical properties and are currently the most commercially successful batteries, and are widely used in mobile phones, notebook computers, and electric vehicles. However, the global reserves of lithium resources are limited and une...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/054B82Y30/00
CPCH01M4/362H01M4/483H01M4/625H01M10/054B82Y30/00H01M2004/027Y02E60/10
Inventor 陈建李瑞卿龙雷智强唐利平
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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