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Hydrothermal synthesis preparation method for spherical Li4Ti5O12

A hydrothermal synthesis, spherical technology, applied in chemical instruments and methods, titanium compounds, inorganic chemistry, etc., can solve the problems of poor electronic conductivity, electrochemical performance, etc., and achieve easy operation, low raw material cost, and no pollution to the environment Effect

Inactive Publication Date: 2014-10-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since Li 4 Ti 5 o 12 The electronic conductivity of the material is poor, which has a great impact on its electrochemical performance.

Method used

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  • Hydrothermal synthesis preparation method for spherical Li4Ti5O12
  • Hydrothermal synthesis preparation method for spherical Li4Ti5O12
  • Hydrothermal synthesis preparation method for spherical Li4Ti5O12

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1). Under the stirring action of a magnetic stirrer, add 1.324g HDA powder to 200ml absolute ethanol, add 0.8ml KCL solution after mixing, continue stirring for 10min, add 4.4ml TIP to the mixed solution. Continue to stir for 30 minutes and then stand for 18 hours.

[0023] 2). Centrifuge and wash the reaction product. Dry at 60°C for 12h to get pure TiO 2 .

[0024] 3). Put LiOH·H 2 O powder is added to the mixed solution of 60ml absolute ethanol and 20ml deionized water, and then the previously prepared TiO 2 0.69g, of which LiOH·H 2 O and TiO 2 The molar ratio of the powder is 4:5, and this process is always accompanied by a magnetic stirrer. After the reactants are added, continue to stir for 30 min.

[0025] 4). After the reactants are uniformly reacted, they are subjected to a hydrothermal reaction at 180°C for 12 hours.

[0026] 5). Centrifuge the reaction product, wash and filter, and dry at 60°C for 12 hours to obtain pure Li 4 Ti 5 O 12 powder.

Embodiment 2

[0028] 1). Under the stirring action of a magnetic stirrer, add 1.324g HDA powder to 200ml absolute ethanol, add 0.8ml KCL solution after mixing, continue stirring for 10min, add 4.4ml TIP to the mixed solution. Continue to stir for 30 minutes and then stand for 18 hours.

[0029] 2). Centrifuge and wash the reaction product. Dry at 60°C for 12h to get pure TiO 2 .

[0030] 3). Put LiOH·H 2 O powder is added to the mixed solution of 60ml absolute ethanol and 20ml deionized water, and then the previously prepared TiO 2 0.69g, of which LiOH·H 2 O and TiO 2 The molar ratio of the powder is 4:5, and this process is always accompanied by a magnetic stirrer. After the reactants are added, continue to stir for 30 min.

[0031] 4). After the reactants are uniformly reacted, they are subjected to a hydrothermal reaction at 180°C for 12 hours.

[0032] 5). Centrifuge the reaction product, wash, and dry at 60°C for 12 hours to obtain pure Li 4 Ti 5 O 12 powder.

Embodiment 3

[0034] 1). Under the stirring action of a magnetic stirrer, add 1.324g HDA to 200mL absolute ethanol, add 0.8ml KCL after mixing, stir for 10min, then add 4.4ml TIP to the mixed solution, and continue stirring after the reactants are added. Let stand for 18h after 50min.

[0035] 2). Centrifuge and wash the reaction product. Dry at 60°C for 12h to get pure TiO 2 powder.

[0036] 3). Put 0.432g LiOH·H 2 O was added to the mixed solution of 60ml absolute ethanol and 20ml deionized water, and then added the previously prepared TiO 2 0.69g, of which LiOH·H 2 O and TiO 2 The molar ratio of the powder is 4:5, and the process is always stirred with a magnetic stirrer. After the addition of the reactants is completed, stirring is continued for 30 minutes.

[0037] 4). After the reactants are uniformly reacted, they are subjected to a hydrothermal reaction at 180°C for 12h.

[0038] 5). Centrifuge the reaction product, wash, and dry at 60°C for 12 hours to obtain pure Li 4 Ti 5 O 12 powder. ...

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Abstract

The invention provides a hydrothermal synthesis preparation method for spherical Li4Ti5O12, belonging to the technical field of anode materials of lithium ion batteries. The hydrothermal synthesis preparation method comprises the following steps of sequentially adding absolute ethyl alcohol, HDA, KCL and TIP into a beaker under the stirring action of a magnetic stirrer; standing for 18h after uniformly stirring the mixed solution, then, centrifuging and washing; drying at the temperature of 60 DEG C for 12h to obtain purified TiO2 powder; next, adding LiOH.H2O powder and TiO2 powder into a mixed solution of absolute ethyl alcohol and deionized water, and carrying out hydrothermal reaction at the temperature of 180 DEG C for 12h after uniformly stirring; and centrifuging a reaction product, washing, and then, drying at the temperature of 60 DEG C for 12h to obtain purified spherical Li4Ti5O12 powder. The hydrothermal synthesis preparation method is simple in process and high in repeatability. The material has favorable electrochemical performance so as to be suitable for use as an anode material of a lithium ion battery.

Description

Technical field [0001] The present invention relates to spherical Li 4 Ti 5 O 12 A hydrothermal synthesis preparation method belongs to the technical field of lithium ion battery anode materials. Background technique [0002] In recent years, due to increasingly serious environmental pollution and sustainable development issues, people are paying more and more attention to environmentally friendly and sustainable energy storage. Therefore, lithium-ion batteries have received more and more attention. Lithium-ion batteries have been widely used in portable electronic devices such as mobile phones and notebook computers because of their high energy density, long cycle life, good safety performance, and environmental friendliness. [0003] Electrode materials are one of the key factors that determine the electrochemical performance of lithium-ion batteries, so the research and development of electrode materials with excellent performance is the core subject of lithium-ion battery rese...

Claims

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Application Information

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IPC IPC(8): H01M4/485C01G23/00
CPCY02E60/122C01G23/005H01M4/485H01M10/0525H01M2004/021Y02E60/10
Inventor 汪浩傅丛丛邓思旭严辉刘晶冰朱满康
Owner BEIJING UNIV OF TECH
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