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Preparation method of carbon-coated titanium oxide anode material used for lithium batteries

A carbon-coated titanium oxide and negative electrode material technology, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve the problems of easy pulverization and agglomeration of bulk titanium oxide, poor conductivity of bulk titanium oxide, and battery cycle performance to achieve the effects of excellent cycle performance and rate performance, good repeatability, and high specific capacity

Inactive Publication Date: 2018-10-26
SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while titanium oxide has outstanding advantages as a negative electrode material for lithium batteries, it also has some disadvantages: first, bulk titanium oxide has poor conductivity, which is not conducive to electron transmission; second, bulk titanium oxide is easy to powder and agglomerate during charging and discharging, resulting in The battery cycle performance drops sharply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare solution 1 with tetrabutyl titanate, absolute ethanol, glacial acetic acid, and PVP as raw materials, prepare solution 2 with absolute ethanol and deionized water as raw materials, and then slowly add solution 2 to solution 1 to obtain TiO 2 Sol-gel solution; the volume ratio of tetrabutyl titanate, absolute ethanol, and glacial acetic acid in the solution one is 1:8:1, and the volume ratio of absolute ethanol in the solution two, deionized water is 7:1, The mass ratio of the PVP to the added tetrabutyl titanate is 1:5.

[0020] Stir at room temperature for 1 hour, then dry at 40°C, under argon atmosphere, heat to 700°C, keep it warm for 2 hours, cool to room temperature, and take out to obtain nano-titanium oxide.

[0021] Add commercially available solid humic acid to 1mol / L potassium hydroxide solution, the mass ratio of humic acid to potassium hydroxide solution is 1:3, stir at 60°C for 20 minutes, centrifuge, take the supernatant and adjust to pH=2, After ...

Embodiment 2

[0024] Prepare solution 1 with tetrabutyl titanate, absolute ethanol, glacial acetic acid, and PVP as raw materials, prepare solution 2 with absolute ethanol and deionized water as raw materials, and then slowly add solution 2 to solution 1 to obtain TiO 2 Sol-gel solution; the volume ratio of tetrabutyl titanate, absolute ethanol, and glacial acetic acid in the solution one is 1:8:1, and the volume ratio of absolute ethanol in the solution two, deionized water is 7:1, The mass ratio of the PVP to the added tetrabutyl titanate is 1:5.

[0025] Stir at room temperature for 2 hours, then dry at 60° C., heat to 700° C. under argon atmosphere, keep warm for 3 hours, cool to room temperature, and take out to obtain nano-titanium oxide.

[0026] Add commercially available solid humic acid to 1.5mol / L potassium hydroxide solution, the mass ratio of humic acid to potassium hydroxide solution is 1:5, stir at 65°C for 40min, centrifuge, take the supernatant and adjust to pH=3 , Stand s...

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PUM

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Abstract

The invention discloses a preparation method of a carbon-coated titanium oxide anode material used for lithium batteries. The method has the characteristics of short technological process, high repeatability and high operability through a compound nanometer TiO2 anode material of a TiO2 sol-gel solution, and various performances of the lithium ion batteries can be improved by taking the material as the anode material used for lithium ion batteries; humic acid is taken as an anode material carbon coating agent, so that the anode material is high in specific capacity, good cycle performance andgood rate capability.

Description

technical field [0001] The invention relates to the field of battery materials, in particular to a method for preparing a carbon-coated titanium oxide negative electrode material for a lithium battery. Background technique [0002] With the rapid development of modern industry, human's demand for energy is increasing day by day. At present, 85% of the energy used in the world comes from fossil raw materials (coal, oil, natural gas, etc.), these raw materials are non-renewable, and the environmental pollution caused by them is also increasing. Therefore, the research and development of green energy and its materials is of great significance for realizing the sustainable development strategy in the 21st century, alleviating the energy crisis and reducing the pressure of environmental pollution. [0003] Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the very ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583H01M10/0525
CPCH01M4/366H01M4/48H01M4/583H01M10/0525Y02E60/10
Inventor 不公告发明人
Owner SUZHOU SICHUANGYUANBO ELECTRONICS TECH CO LTD