Composite negative electrode material for sodium ion batteries and preparation method thereof

A technology of sodium ion battery and negative electrode material, applied in battery electrodes, secondary batteries, electrode carriers/current collectors, etc., can solve the problems of lack of lithium resources, difficulty in maintaining energy demand, etc., to overcome low active surface and increase specific capacity , the effect of increasing energy density

Active Publication Date: 2019-03-15
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lack of lithium resources on the earth makes it difficult to sustain the increasing energy demand of human beings

Method used

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  • Composite negative electrode material for sodium ion batteries and preparation method thereof
  • Composite negative electrode material for sodium ion batteries and preparation method thereof
  • Composite negative electrode material for sodium ion batteries and preparation method thereof

Examples

Experimental program
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specific Embodiment approach 1

[0048] A preparation method of a composite negative electrode material for a sodium ion battery, comprising the steps of:

[0049] Step a, prepare graphene foam material, stand-by;

[0050] Step b, growing carbon nanotubes on the graphene foam material prepared in step a, preparing a carbon nanotube-graphene foam composite material for use;

[0051] Step c, surface-treating the carbon nanotube-graphene foam composite material prepared in step b, and stand-by after treatment;

[0052] Step d, configuring the vanadium dioxide nanosheet reaction solution for use;

[0053] Step e, place the carbon nanotube-graphene foam composite material prepared in step c completely in the vanadium dioxide nanosheet reaction solution configured in step d, control the reaction temperature at 180°C, and the reaction time for 3h, take out the product after the reaction, and use Rinse four times with deionized water and alcohol, and dry in a vacuum oven at 120°C for 6 hours. Finally, the product ...

specific Embodiment approach 2

[0070] A kind of sodium ion battery composite negative electrode material prepared according to the preparation method of a kind of sodium ion battery composite negative electrode material described in specific embodiment 1, the capacity of the described a kind of sodium ion battery composite negative electrode material≦650mAhg -1 .

[0071] A composite negative electrode material for a sodium ion battery prepared by the method for preparing a composite negative electrode material for a sodium ion battery described in this embodiment is subjected to an X-ray diffraction test as follows: figure 1 As shown, it can be seen from the X-ray diffraction spectrum that there is a strong diffraction peak at about 26 °, which is the diffraction peak of graphene (JCPDS-NO.75-1621), corresponding to the (002) crystal plane of 2H phase graphene , and all other diffraction peaks can be consistent with the monoclinic phase VO2(B) (JCPDS-NO.31-1438) in the PDF card, without other miscellaneous...

specific Embodiment approach 3

[0075] A preparation method of a composite negative electrode material for a sodium ion battery, comprising the steps of:

[0076] Step a, prepare graphene foam material, stand-by;

[0077] Step b, growing carbon nanotubes on the graphene foam material prepared in step a, preparing a carbon nanotube-graphene foam composite material for use;

[0078] Step c, surface-treating the carbon nanotube-graphene foam composite material prepared in step b, and stand-by after treatment;

[0079] Step d, configuring the vanadium dioxide nanosheet reaction solution for use;

[0080] In step e, the carbon nanotube-graphene foam composite material prepared in step c is completely placed in the vanadium dioxide nanosheet reaction liquid prepared in step d, the reaction temperature is controlled at 175-185°C, the reaction time is 3-3.5h, and the reaction Finally, the product was taken out, rinsed with deionized water and alcohol for 3 to 5 times, and dried in a vacuum oven at 120 to 130°C for...

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Abstract

The invention discloses a composite negative electrode material for sodium ion batteries and a preparation method thereof, and belongs to the field of negative electrode materials for sodium ion batteries. The technical problem to be solved is to develop a novel negative electrode material for sodium ion batteries. The preparation method comprises the following steps: preparing a graphene foam material; growing a carbon nano tube on the prepared graphene foam material; preparing a carbon nano tube-graphene foam composite material; carrying out surface treatment on the prepared carbon nano tube-graphene foam composite material; configuring a vanadium dioxide nanosheet reaction fluid; completely putting the prepared carbon nano tube-graphene foam composite material into the vanadium dioxidenanosheet reaction fluid; controlling reaction temperature to be 175 to 185 DEG C and reaction time to be 3 to 3.5 h; taking out a product after the reaction; washing with deionized water and ethyl alcohol for several times; drying; and annealing for 2 to 2.5 h. According to the negative electrode material for sodium ion batteries, the electrical conductivity of active substances and the energy density of the batteries are improved.

Description

technical field [0001] The invention belongs to the field of negative electrode materials for sodium ion batteries; in particular, it relates to a composite negative electrode material for sodium ion batteries and a preparation method thereof. Background technique [0002] At present, the main way for humans to obtain energy is through the burning of fossil fuels. However, the massive burning of fossil fuels will not only lead to resource depletion, but also bring serious environmental pollution and climate warming. Therefore, developing renewable and environmentally friendly energy storage and conversion technologies has become a research goal worldwide. Lithium-ion batteries have attracted the attention of many researchers due to their advantages of high reversible specific capacity, long cycle life and environmental friendliness, and have been widely used in portable electronic devices. However, the lack of lithium resources on the earth makes it difficult to sustain the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M4/66H01M4/70H01M10/054B82Y40/00
CPCH01M4/366H01M4/483H01M4/625H01M4/628H01M4/663H01M4/70H01M10/054B82Y40/00Y02E60/10
Inventor 陈明华晁栋梁梁心琪陈庆国
Owner HARBIN UNIV OF SCI & TECH
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