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Hollow titanium oxide composite material, and preparation method and application thereof

A technology of composite materials and titanium oxide, which is applied in the field of composite materials, can solve the problems of electrode deformation and poor cycle stability, and achieve the effects of improved electrochemical performance, excellent charge and discharge performance, and simple process steps

Active Publication Date: 2016-03-16
江苏久荣智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In view of the problems of poor cycle stability, electrode deformation and negative electrode material conductivity in the prior art, the purpose of the invention is to provide a high-performance hollow titanium oxide composite material rich in oxygen vacancies, the composite material Preparation method and application in lithium ion battery

Method used

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  • Hollow titanium oxide composite material, and preparation method and application thereof
  • Hollow titanium oxide composite material, and preparation method and application thereof
  • Hollow titanium oxide composite material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 28.6mL of deionized water and 71.4mL of ethanol were prepared into a mixed solution, stirred evenly by ultrasonic, 0.2g of Si nanoparticles were taken, dispersed in it and stirred by ultrasonic for 1h. Add 1.2g of cetyltrimethylammonium bromide (CTAB), 0.175g of resorcinol and 0.1mL of ammonia water to the above mixed solution, stir ultrasonically for 30min, then place in an oil bath at 45°C and stir for 30min , add 0.15mL formaldehyde solution, continue to stir at 45°C for 24h, then turn off the oil bath heating switch, filter with suction, wash 3 times with deionized water, and dry in vacuum at 70°C for 3h to prepare Si nanoparticles coated with phenolic resin layers of composite material.

[0035] Take 0.15g of Si composite material coated with phenolic resin layer, ultrasonically disperse in 200ml of absolute ethanol for 30min, add 0.5mL of 28wt% concentrated ammonia water, ultrasonically for 5min, then transfer to a 500mL round bottom flask, and use in an oil bath ...

Embodiment 2

[0040] Prepare a mixed solution of 28.6mL deionized water and 71.4mL ethanol, stir it evenly by ultrasonic, take 0.2gIn 2 o 3 nanoparticles, dispersed therein and ultrasonically stirred for 1 h. Add 1.2g CTAB, 0.175g resorcinol and 0.1mL ammonia water to the above mixed solution, stir ultrasonically for 30min, then place in an oil bath and stir at 45°C for 30min, add 0.15mL formaldehyde solution, and continue stirring at 45°C 5h, then turn off the oil bath heating switch, filter with suction, wash 3 times with deionized water, and vacuum dry at 70°C for 3h to prepare In 2 o 3 Nanoparticles coated with phenolic resin layer of In 2 o 3 composite material.

[0041] Take 0.15g of In covered with phenolic resin layer 2 o 3 Composite material, ultrasonically dispersed in 200ml of absolute ethanol for 30min, add 0.5mL of 28wt% concentrated ammonia water, ultrasonic for 5min, then transfer to a 500mL round bottom flask, use magnetic stirring in an oil bath, add 1.5mL within 5mi...

Embodiment 3

[0046] Prepare a mixed solution with 28.6mL of deionized water and 71.4mL of ethanol, and stir it evenly by ultrasonic. Take 0.2g of nano SnO 2 Balls, dispersed in which ultrasonic stirring for 1h. Add 1.2g CTAB, 0.175g resorcinol, and 0.1mL ammonia water to the above solution, and stir ultrasonically for 30min. Then put it in an oil bath at 45°C and stir for 30min, add 0.15mL of formaldehyde solution, keep stirring at 45°C for 5h, turn off the oil bath heating switch, filter with suction, wash with deionized water 3 times, and vacuum dry at 70°C for 3h , to prepare SnO coated with phenolic resin layer 2 composite material.

[0047] Get 0.15g of SnO coated with phenolic resin layer 2 The composite material was ultrasonically dispersed in 200ml of absolute ethanol for 30min, then 0.5mL of 28wt% concentrated ammonia was added, and ultrasonicated for 5min. Then transfer to a 500mL round bottom flask, place in an oil bath and use magnetic stirring, add 1.5mL tetrabutyl titana...

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Abstract

The invention discloses a hollow titanium oxide composite material, and a preparation method and application thereof in a lithium ion battery. The surface of an active substance is coated with a phenolic resin layer serving as a sacrifice template and then coated with a porous titanium oxide material, and the active substance coated hollow titanium oxide composite material containing rich oxygen vacancies is obtained by template removing and CaH2 treatment. The hollow titanium oxide composite material prepared according to the method can be used as a negative electrode material of the lithium ion battery. The hollow titanium oxide composite material, the preparation method and the application thereof, disclosed by the invention, have the advantages of simplicity in process step, short reaction time, high repeatability, high yield and low cost, and have the favorable large-scale application potential; with a hollow structure of the hollow titanium oxide composite material and the existing of a titanium oxide coating layer containing the rich oxygen vacancies, the electrochemical performance of the active substance can be obviously improved; and when used for preparing a lithium ion electrode, the hollow titanium oxide composite material has favorable cycle stability and excellent charging-discharging performance.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a high-performance hollow titanium oxide composite material, a preparation method and an application in lithium-ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of high open-circuit voltage, high energy density, long service life, no memory effect, less pollution, and low self-discharge rate. Its overall performance is superior to other traditional secondary batteries, and it is unanimously considered as a variety of portable batteries. The most ideal power supply for electronic equipment and electric vehicles. Although graphite, the negative electrode material of traditional lithium-ion batteries, has good cycle stability and high cost performance, due to its low charge-discharge specific capacity and no advantage in volume specific capacity, it is difficult to meet the high requirements of power systems, especially electric vehi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/48H01M4/62H01M10/0525
CPCH01M4/366H01M4/386H01M4/48H01M4/624H01M4/628H01M10/0525Y02E60/10
Inventor 岳鹿张文惠汤佳磊吴林
Owner 江苏久荣智能科技有限公司
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