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Preparation method of tin-dioxide-coated carbon fiber material, and product and application thereof

A technology of carbon fiber material and tin dioxide, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of high production cost, achieve the effects of low price, favorable electron transmission, and long cycle life

Active Publication Date: 2014-04-23
ZHANGJIAGANG HUASHENG CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above-mentioned published documents, carbon fiber is directly used as raw material, and the production cost is high.

Method used

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  • Preparation method of tin-dioxide-coated carbon fiber material, and product and application thereof
  • Preparation method of tin-dioxide-coated carbon fiber material, and product and application thereof
  • Preparation method of tin-dioxide-coated carbon fiber material, and product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] (1) Using isopropanol and methanol with a volume ratio of 1:1 as solvents, prepare tetraisopropyl stannate solution with a concentration of 10mM, stir at room temperature for 1 hour, and heat to 50°C.

[0041] (2) Put the quantitative filter paper commonly used in the laboratory in the suction filtration device, wash the filter paper with ethanol for 3 times, and vacuum dry it.

[0042] (3) Wrap the suction filtration device in a heating belt and keep the temperature of the device at 50°C.

[0043] (4) Add 20mL of the tetraisopropyl stannate solution prepared in step (1) to the suction filtration device in step (3), and filter half of the solution with suction to soak the natural cellulose, and keep the liquid level higher than the natural fiber at all times The surface of the element, let it stand for 3 minutes, this is the deposition process.

[0044] (5) Filter the isopropyl stannate solution with low vacuum until the liquid level is slightly higher than the surface...

Embodiment 1

[0050] Step (7) in Example 1 was changed to calcining at 500° C. in air for 6 hours, and the rest were the same as in Example 1. The natural cellulose as a template is removed by air calcination, and the obtained tin dioxide nanotube material is obtained.

[0051] The transmission electron micrograph of the tin dioxide nanotube material that comparative example prepares is as Figure 4 As shown, compared with the tin dioxide-wrapped carbon fiber material prepared in the example, the nanoparticle size of the tin dioxide nanotubes prepared in the comparative example is larger, and the particle size distribution is not uniform enough.

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Abstract

The invention discloses a preparation method of a tin-dioxide-coated carbon fiber material, and a product and application thereof. The preparation method comprises the following steps: depositing a tin dioxide film on the surface of natural cellulose by a sol-gel process by using tetraisopropyl stannate as a precursor and the natural cellulose as a template and carbon source, and calcining in an inert gas protective atmosphere to obtain the tin-dioxide-coated carbon fiber material. The raw material natural cellulose used as the template and carbon source has the advantages of wide sources and low price; the preparation method is simple and easy to implement, and has the advantages of low cost and no pollution; and when being used as a lithium ion battery negative pole material, the prepared tin-dioxide-coated carbon fiber material has the advantages of high specific capacity, high loop stability, long cycle life and the like.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a preparation method, product and application of a tin dioxide-wrapped carbon fiber material. Background technique [0002] With the rapid development of science and technology, various electronic devices and electric vehicles have been widely used, and the requirements for chemical power sources are also getting higher and higher. Lithium-ion batteries have been widely used in electronic devices due to their small size, high specific capacity, environmental protection, and the advantages of being able to be charged and discharged many times. At present, the negative electrode material of commercialized lithium-ion batteries is mostly graphite, but the low theoretical specific capacity (372mAh / g) of graphite limits the further development of high-capacity lithium-ion batteries. Studies have found that the reversible lithium storage capacity of tin-based, silicon-based and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48
CPCH01M4/483H01M4/625Y02E60/10
Inventor 黄建国王梦亚贾冬玲张先林沈鸣
Owner ZHANGJIAGANG HUASHENG CHEM CO LTD
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