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Lithium ion battery cathode material of anatase TiO2 mixed carbon nanotube

A technology for lithium ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle performance and rate charge-discharge performance, and achieve the first charge-discharge efficiency improvement, electrical conductivity improvement, and preparation. Simple and easy process

Active Publication Date: 2015-07-22
SHENZHEN XIANGFENGHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims at the deficiency of prior art, and its main purpose is to provide a kind of anatase TiO 2 The lithium-ion battery anode material mixed with carbon nanotubes can effectively solve the problems of the existing titanium dioxide (B) anode materials such as poor cycle performance and rate charge-discharge performance

Method used

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  • Lithium ion battery cathode material of anatase TiO2 mixed carbon nanotube

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Embodiment 1

[0025] An anatase TiO 2 The lithium-ion battery negative electrode material mixed with carbon nanotubes is made of the following raw materials in parts by weight: anatase TiO 2 360, carbon nanotubes 50, graphite 45, gallium powder 6, cesium powder 4, lithium cobalt oxide 4, cerium oxide 2 and ammonium persulfate 2. The carbon nanotubes are single-wall carbon nanotubes, the diameter of the carbon nanotubes is 50 nm, and the tube length is 10 μm. Described graphite is natural graphite.

[0026] During preparation, the following steps are included:

[0027] (1) Dispersion: Anatase TiO 2 , graphite, gallium powder, cesium powder, lithium cobaltate, cerium oxide and ammonium persulfate are dispersed in a solvent, and ultrasonic 1h is obtained to obtain a mixed slurry;

[0028] (2) Grinding: Grind the mixed slurry with a sand mill for 2 h at a grinding speed of 1000 r / min, then add a solvent to adjust the solid mass content of the mixed slurry to 10%;

[0029] (3) Mixing and s...

Embodiment 2

[0033] An anatase TiO 2 The lithium-ion battery negative electrode material mixed with carbon nanotubes is made of the following raw materials in parts by weight: anatase TiO 2 390, carbon nanotubes 60, graphite 55, gallium powder 8, cesium powder 6, lithium cobalt oxide 6, cerium oxide 4 and ammonium persulfate 3. The carbon nanotubes are double-walled carbon nanotubes, the diameter of the carbon nanotubes is 80 nm, and the length of the carbon nanotubes is 25 μm. The graphite is artificial graphite.

[0034] During preparation, the following steps are included:

[0035] (1) Dispersion: Anatase TiO 2 , graphite, gallium powder, cesium powder, lithium cobaltate, cerium oxide and ammonium persulfate are dispersed in a solvent, and ultrasonicated for 3 hours to obtain a mixed slurry;

[0036] (2) Grinding: Grind the mixed slurry with a sand mill for 4 h at a grinding speed of 2200 r / min, then add a solvent to adjust the solid mass content of the mixed slurry to 30%;

[003...

Embodiment 3

[0041] An anatase TiO 2 The lithium-ion battery negative electrode material mixed with carbon nanotubes is made of the following raw materials in parts by weight: anatase TiO2 375, carbon nanotubes 55, graphite 50, gallium powder 7, cesium powder 5, lithium cobaltate 5, cerium oxide 3 and ammonium persulfate 2.5. The carbon nanotubes are multi-walled carbon nanotubes, the diameter of the carbon nanotubes is 65 nm, and the tube length is 17.5 μm. The graphite is a mixture of natural graphite and artificial graphite.

[0042] During preparation, the following steps are included:

[0043] (1) Dispersion: Anatase TiO 2 , graphite, gallium powder, cesium powder, lithium cobaltate, cerium oxide and ammonium persulfate were dispersed in the solvent, and ultrasonically 2.5h to obtain a mixed slurry;

[0044] (2) Grinding: Grind the mixed slurry with a sand mill for 3 h at a grinding speed of 1600 r / min, then add solvent to adjust the solid mass content of the mixed slurry to 20%; ...

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Abstract

The invention discloses a lithium ion battery cathode material of an anatase TiO2 mixed carbon nanotube. The lithium ion battery cathode material is prepared from the following raw materials in parts by weight: 360-390 parts of anatase TiO2, 50-60 parts of carbon nanotubes, 45-55 parts of graphite, 6-8 parts of gallium powder, 4-6 parts of caesium powder, 4-6 parts of lithium cobalt oxide, 2-4 parts of cerium oxide and 2-3 parts of ammonium persulfate. With the combination of anatase TiO2 and the carbon nanotubes, and due to the adoption of the formula disclosed by the invention, the lithium ion battery cathode material of the anatase TiO2 mixed carbon nanotube replaces the conventional cathode material, namely titanium dioxide (B), the conductivity and the mechanical property are greatly improved, and due to the improvement of the conductivity and the mechanical property, the circulation property, the multiplying power charge / discharge property and the first charge / discharge efficiency of the lithium ion battery cathode material are further improved, and in addition, the preparation method is simple in process, relatively low in production cost, and simple and feasible in preparation process.

Description

technical field [0001] The invention relates to the technology in the field of negative electrode materials, in particular to an anatase TiO 2 Lithium-ion battery anode materials mixed with carbon nanotubes. Background technique [0002] Due to its high energy density and good cycle performance, lithium-ion batteries have been widely used and gradually replaced traditional chemical power sources such as lead-acid batteries in many fields. Especially with the increasingly prominent energy and environmental issues, the new energy industry has received more and more attention. The hybrid electric vehicle and electric vehicle industries are developing rapidly, and lithium-ion batteries are widely used as an important energy storage device. [0003] Titanium dioxide has become a research hotspot in the field of materials due to its broad application prospects in photocatalysis, photolysis of water, sensors, dye-sensitized solar cells, and lithium-ion batteries. Common titanium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/62H01M10/0525
CPCH01M4/485H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 宋宏芳赵东辉戴涛周鹏伟
Owner SHENZHEN XIANGFENGHUA TECH CO LTD
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