Preparation method of layered stacked TiO2/MoS2 core-shell structural composite material as lithium ion battery cathode

A lithium-ion battery, core-shell structure technology, applied in battery electrodes, secondary batteries, structural parts, etc., can solve the problems of low energy density of negative electrode materials, rate performance, and cycle performance that cannot meet the needs of electric vehicle development, etc. The effect of uniform sample size, high crystallinity and large discharge capacity

Inactive Publication Date: 2016-06-08
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current commercialized lithium-ion battery anode materials have low energy density, and the

Method used

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  • Preparation method of layered stacked TiO2/MoS2 core-shell structural composite material as lithium ion battery cathode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The method of the present invention comprises the following steps:

[0024] S1: Dissolve 0.1g titanium tetrafluoride in 40ml benzyl alcohol;

[0025] S2: Pour the above solution into a hydrothermal kettle with a volume of 50ml, raise the temperature to 180 degrees, and keep it for 12 hours;

[0026] S3: Centrifuge the obtained product, after cleaning, dry it at 60°C and anneal at 500°C for 2 hours to obtain TiO 2 ;

[0027] S4: Weigh 30mg of TiO 2 , 30mg of oxalic acid, 60mg of sodium molybdate, 120mg of thioacetamide were added to 80ml of deionized water, fully stirred and then poured into a hydrothermal kettle with a volume of 100ml, heated to 200 degrees, and reacted for 20 hours;

[0028] S5: Centrifuge the obtained product, after cleaning, dry it at 60 degrees to obtain TiO 2 / MoS 2 Core-shell composites.

Embodiment 2

[0030] The method of the present invention comprises the following steps:

[0031] S1: Dissolve 0.1g titanium tetrafluoride in 40ml benzyl alcohol;

[0032] S2: Pour the above solution into a hydrothermal kettle with a volume of 50ml, raise the temperature to 180 degrees, and keep it for 12 hours;

[0033] S3: Centrifuge the obtained product, after cleaning, dry it at 60°C and anneal at 500°C for 2 hours to obtain TiO 2 ;

[0034] S4: Weigh 30mg of TiO 2 After adding 80ml of deionized water to 30mg of oxalic acid, 45mg of sodium molybdate, and 90mg of thioacetamide, pour it into a hydrothermal kettle with a volume of 100ml after fully stirring, heat up to 200 degrees, and react for 20 hours;

[0035] S5: Centrifuge the obtained product, after cleaning, dry it at 60 degrees to obtain TiO 2 / MoS 2 Core-shell composites.

Embodiment 3

[0037] The method of the present invention comprises the following steps:

[0038] S1: Dissolve 0.1g titanium tetrafluoride in 40ml benzyl alcohol;

[0039] S2: Pour the above solution into a hydrothermal kettle with a volume of 50ml, raise the temperature to 180 degrees, and keep it for 12 hours;

[0040] S3: Centrifuge the obtained product, after cleaning, dry it at 60°C and anneal at 500°C for 2 hours to obtain TiO 2 ;

[0041] S4: Weigh 30mg of TiO 2 , 30mg of oxalic acid, 30mg of sodium molybdate, 60mg of thioacetamide were added to 80ml of deionized water, fully stirred and then poured into a hydrothermal kettle with a volume of 100ml, heated to 200 degrees, and reacted for 20 hours;

[0042] S5: Centrifuge the obtained product, wash it, and dry it at 60 degrees to obtain a TiO2 / MoS2 core-shell structure composite material.

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Abstract

The invention discloses a preparation method of a layered stacked TiO2/MoS2 core-shell structure composite material as a lithium ion battery cathode. The preparation method comprises the following steps: firstly, dissolving titanium tetrafluoride into phenylcarbinol to prepare a solution of 2.5g/L; secondly, pouring the solution obtained in the step S1 into a hydrothermal kettle, heating to 180 DEG C, and preserving the heat for 12 hours; centrifuging and washing a product obtained in the step S2, drying the product at 60 DEG C to obtain TiO2, and annealing TiO2 for two hours at 500 DEG C; performing the hydrothermal reaction on TiO2 and oxalic acid, thioacetamide and sodium molybdate for 20 hours at 500 DEG C; and finally washing the product obtained in the step S4 by utilizing water and ethanol, and drying in the air at the temperature of 60 DEG C to obtain the TiO2/MoS2 core-shell structure composite material. The prepared TiO2/MoS2 core-shell structure composite material is high in energy density, high in purity and high in degree of crystallinity.

Description

technical field [0001] The invention relates to the field of lithium battery manufacturing, in particular to a layered stack of TiO as the negative electrode of lithium ion batteries 2 / MoS 2 Preparation method of core-shell structure composite material. Background technique [0002] At present, lithium-ion batteries have important applications in human production and life. With the rapid development of portable electronic devices, especially electric vehicles, people put forward higher requirements on the performance of lithium-ion batteries. However, the negative electrode materials of commercial lithium-ion batteries have low energy density, and their rate performance and cycle performance cannot meet the needs of the development of electric vehicles. Contents of the invention [0003] Purpose of the invention: The purpose of the present invention is to provide a layered stacked TiO with high energy density, high purity and high crystallinity as the negative electrod...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/58H01M10/0525
CPCH01M4/366H01M4/483H01M4/5815H01M10/0525Y02E60/10
Inventor 罗永松彭涛陆阳闫海龙
Owner XINYANG NORMAL UNIVERSITY
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