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Method for preparing high-capacity battery anode material

A battery negative electrode and electrode material technology, applied in the field of materials science, can solve the problems of poor rate performance and low electrochemical performance, and achieve the effects of increased rate performance, increased diffusion rate, and high rate performance

Active Publication Date: 2018-09-18
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0007] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing a high-capacity battery negative electrode material. The method for preparing a high-capacity battery negative electrode material should solve the electrochemical problems of metal oxide electrode materials in the prior art. Low performance, especially the technical problem of poor magnification performance

Method used

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  • Method for preparing high-capacity battery anode material
  • Method for preparing high-capacity battery anode material
  • Method for preparing high-capacity battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The prepared metal oxide material with high-performance three-dimensional carbon nanotubes as the skeleton, the structural test of the material and the electrochemical performance test of the assembled lithium-ion simulated battery.

[0036] 1) Disperse 0.12g of oxidized multi-walled carbon nanotubes in 20mL of deionized water, sonicate for 30min to disperse evenly, then add 0.1mL of pyrrole liquid, and continue sonicating for 30min to obtain a dispersed suspension;

[0037] 2) Transfer the dispersed oxidized multi-walled carbon nanotube solution to a 75mL polytetrafluoroethylene liner, put it into a reaction kettle, and react at 180°C for 24h to obtain a gel-like nitrogen-rich carbon nanotube, and then freeze-dry 48h, obtain nitrogen-rich carbon nanotube aerogel;

[0038] 3) Add 5.68 g of titanium tetraisopropoxide solution into 5 mL of isopropanol, disperse it evenly by ultrasonication for 30 minutes, then add multi-walled carbon nanotube aerogel, and fully infiltrate...

Embodiment 2

[0044] The prepared metal oxide material with high-performance three-dimensional carbon nanotubes as the skeleton, the structural test of the material and the electrochemical performance test of the assembled lithium-ion simulated battery.

[0045] 1) Disperse 0.12g of oxidized multi-walled carbon nanotubes in 20mL of deionized water, sonicate for 30min to disperse evenly, then add 0.1mL of pyrrole liquid, and continue sonicating for 30min to obtain a dispersed suspension;

[0046] 2) Transfer the dispersed carbon dioxide multi-wall nanotube solution to a 75mL polytetrafluoroethylene liner, put it in a reaction kettle, and react at 180°C for 24h to obtain a gel-like nitrogen-rich carbon nanotube, and then freeze-dry 48h, obtain nitrogen-rich carbon nanotube aerogel;

[0047] 3) 5.4g of FeCl 3 ·6H 2 O solution was added to 5 mL of deionized water, ultrasonically dispersed for 30 minutes to make it evenly dispersed, and then carbon nanotube aerogel was added to fully infiltrat...

Embodiment 3、 Embodiment 4

[0053]

[0054]

[0055] Referring to the method of Example 1 or Example 2 according to the above experimental parameters, 0.02 mol corresponding metal oxide electrode materials with high-performance three-dimensional carbon nanotubes as the skeleton can be obtained respectively.

[0056] The metal oxide material of the present invention uses nitrogen-containing carbon nanotubes as the carbon skeleton. During the high-temperature crystallization process, N atoms combine with C and metal atoms to form an electron cloud, so that the self-assembled metal oxide on the carbon skeleton The material has excellent electrochemical properties, and has the advantages of environmental friendliness, simplicity, high yield, good controllability, etc., and is suitable for large-scale industrial production.

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Abstract

The invention provides a method for preparing a high-capacity battery anode material, comprising the steps of: oxidizing carbon nanotubes, adding the oxidized carbon nanotubes and pyrrole monomers towater, dispersing and preparing an oxidized carbon nanotube solution; transferring the solution to the reaction vessel for hydrothermal heating, and then freeze-drying the same to obtain a carbon nanotube aerogel; sufficiently wetting the carbon nanotube aerogel into the metal oxide precursor solution to obtain a mixed solution; and subjecting the mixed solution to a hydrothermal reaction. After the hydrothermal treatment, the product is subjected to high temperature treatment under a protective atmosphere to prepare a metal oxide electrode material with high-performance three-dimensional carbon nanotubes as a skeleton. Due to self-assembly, the invention not only provides a carbon skeleton for the metal oxide material to improve its conductivity, but in the high-temperature crystallization process, combines the N atom in the nitrogen-containing carbon nanotube with the C and the metal atom to form an electron cloud, so that the electrode of the metal oxide material obtained by self-assembly to the carbon skeleton exhibits very good rate performance.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a battery electrode material, in particular to a preparation method of a high-capacity battery negative electrode material. Background technique [0002] With the escalation of the fossil energy crisis, the contradiction between the growth of energy demand and the lack of fossil fuels has become increasingly prominent, and renewable clean energy has emerged as the times require, which has also led to the rapid development of electrochemical energy storage technology. Lithium-ion batteries are favored due to their excellent properties such as high reversible capacity, long cycle performance and high energy density, and they occupy a dominant position in current commercial energy storage devices. However, with the continuous upgrading and wide application of electric (or hybrid) vehicles and portable devices, lithium-ion batteries are required to have higher energy storage performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36
CPCH01M4/36Y02E60/10
Inventor 袁涛郑时有杨俊和骆赛男阮佳锋马琳博周迪
Owner UNIV OF SHANGHAI FOR SCI & TECH
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