A kind of sodium titanate nanowire/graphene composite negative electrode material and preparation method thereof

A graphene composite and negative electrode material technology, which is applied in battery electrodes, electrical components, non-aqueous electrolyte storage batteries, etc., can solve the problem of poor electrochemical performance of sodium titanate nanowires/graphene composite negative electrode materials, sodium ions, cumbersome process, sodium Solve the problems of poor ion electrochemical performance, achieve good sodium storage performance, simple process, and excellent morphology

Active Publication Date: 2018-06-05
REAL POWER IND LTD
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  • Abstract
  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a sodium titanate nanowire / graphene composite negative electrode material, aiming to solve the cumbersome preparation process of the existing sodium titanate nanowire / graphene composite negative electrode material and the resulting titanic acid Sodium nanowire / graphene composite anode material has poor electrochemical performance of sodium ion
[0006] Another object of the present invention is to provide a sodium titanate nanowire / graphene composite negative electrode material, which aims to solve the problem of poor sodium ion electrochemical performance of the existing sodium titanate nanowire / graphene composite negative electrode material

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  • A kind of sodium titanate nanowire/graphene composite negative electrode material and preparation method thereof
  • A kind of sodium titanate nanowire/graphene composite negative electrode material and preparation method thereof
  • A kind of sodium titanate nanowire/graphene composite negative electrode material and preparation method thereof

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[0020] The embodiment of the present invention provides a method for preparing a sodium titanate nanowire / graphene composite negative electrode material, comprising the following steps:

[0021] S01. graphite oxide is dissolved in an organic solvent to obtain a graphene oxide solution;

[0022] S02. Add a titanium source in the graphene oxide solution, and after mixing, carry out the first solvothermal reaction to obtain a titanium dioxide / graphene composite;

[0023] S03. Add NaOH aqueous solution to the titanium dioxide / graphene composite, and carry out the second solvothermal reaction to obtain the crude product of sodium titanate nanowire / graphene;

[0024] S04. The sodium titanate nanowire / graphene crude product is washed with water until the pH value is neutral, and dried to obtain a sodium titanate nanowire / graphene composite negative electrode material.

[0025] Specifically, in the above step S01, the graphite oxide can be purchased from the market, or can be prepare...

Embodiment 1

[0042] A preparation method of sodium titanate nanowire / graphene composite negative electrode material, comprising the following steps:

[0043] S11. Take 60mg of graphite oxide, add it to 30mL of absolute ethanol, conduct ultrasonic treatment at a constant temperature of 30°C for 30min, and continue stirring for 2h to obtain a graphene oxide ethanol solution;

[0044] S12. Add 0.3 mL of tetrabutyl titanate to the graphene oxide ethanol solution, stir and mix evenly, pour it into a hydrothermal reaction kettle, and perform a solvothermal reaction at 200° C. for 12 hours to obtain a titanium dioxide / graphene composite ;

[0045] S13. Wash the titanium dioxide / graphene composite with water and suction filter, put the filter residue into a hydrothermal reaction kettle, add an appropriate amount of 10mol / L NaOH aqueous solution 5mL, and conduct a hydrothermal reaction at 200°C for 12h to obtain sodium titanate nano Wire / graphene crude product;

[0046] S14. The sodium titanate n...

Embodiment 2

[0051] A preparation method of sodium titanate nanowire / graphene composite negative electrode material, comprising the following steps:

[0052] S21. Take 60mg of graphite oxide, add it to 30mL of absolute ethanol, conduct ultrasonic treatment at a constant temperature of 60°C for 10min, and continue stirring for 4h to obtain a graphene oxide ethanol solution;

[0053] S22. Add 0.5 mL of tetrabutyl titanate to the graphene oxide ethanol solution, stir and mix evenly, pour it into a hydrothermal reaction kettle, and perform a solvothermal reaction at 160° C. for 12 hours to obtain a titanium dioxide / graphene composite ;

[0054] S23. Wash the titanium dioxide / graphene composite with water and suction filter, put the filter residue into a hydrothermal reaction kettle, add an appropriate amount of 10mol / L NaOH aqueous solution 10mL, and conduct a hydrothermal reaction at 220°C for 24h to obtain sodium titanate nano Wire / graphene crude product;

[0055]S24. The sodium titanate n...

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Abstract

The invention belongs to the field of sodium ion battery negative electrode material, and provides a sodium titanate nanowire / graphene composite negative electrode material, and a preparation method thereof. The preparation method of the sodium titanate nanowire / graphene composite negative electrode material comprises following steps: graphite oxide is dissolved in an organic solvent so as to obtain a graphene oxide solution; a titanium source is added into the graphene oxide solution, a first time solvothermal reaction is carried out after mixing treatment so as to obtain a titanium dioxide / graphene compound; a NaOH aqueous solution is added into the titanium dioxide / graphene compound for a second time of solvothermal reaction so as to obtain a sodium titanate nanowire / graphene crude product; the sodium titanate nanowire / graphene crude product is washed with water until pH value is 7, and is dried so as to obtain the sodium titanate nanowire / graphene composite negative electrode material.

Description

technical field [0001] The invention belongs to the field of negative electrode materials for sodium ion batteries, and in particular relates to a sodium titanate nanowire / graphene composite negative electrode material and a preparation method thereof. Background technique [0002] Among the existing energy storage battery systems, lithium-ion batteries have been widely used in portable electronic devices, electric vehicles, aerospace and other fields due to their advantages such as high energy density, long cycle life, high working voltage, and no memory effect. However, there are still many problems, such as battery safety, cost issues, resource dependence bottlenecks, etc. Sodium-ion battery is a battery system similar to lithium-ion battery. It has the advantages of abundant raw material resources, low cost, high specific capacity, and good safety performance. It is a very promising chemical power source. High new energy storage and power grid peak shaving and other lar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/485H01M4/62H01M10/05
CPCH01M4/485H01M4/625H01M10/05Y02E60/10
Inventor 唐永炳张帆李振声
Owner REAL POWER IND LTD
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