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Preparation method and application of a copper foil-loaded sodium-ion battery negative electrode material

A technology for sodium ion batteries and negative electrode materials, which is applied in the manufacture of electrodes, battery electrodes, and electrolyte storage batteries. Effect of initial discharge capacity

Active Publication Date: 2021-08-17
SHAANXI UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method and application of copper foil-loaded sodium-ion battery negative electrode materials, and solve the problem of carbon nanotubes in the hybrid body prepared by the existing copper foil-loaded sodium-ion battery negative electrode materials. Defects with disordered orientation and insufficient dispersion

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  • Preparation method and application of a copper foil-loaded sodium-ion battery negative electrode material
  • Preparation method and application of a copper foil-loaded sodium-ion battery negative electrode material
  • Preparation method and application of a copper foil-loaded sodium-ion battery negative electrode material

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preparation example Construction

[0027] The preparation method of a copper foil-supported sodium ion battery negative electrode material provided by the present invention, the specific steps are as follows:

[0028] Step 1: Preparation of graphene film

[0029] Using copper foil as a template, the graphene film is grown by chemical vapor deposition process. The growth process conditions are: the carbon-containing precursor is used as the growth carbon source, the reaction temperature is 850-1050°C, the reaction time is 0.1-3h, and the flow rate of the carbon-containing precursor is 0.1- 150mL / min, argon flow rate 100-500mL / min, hydrogen flow rate 50-400mL / min;

[0030] Step 2: Growing Carbon Nanotubes on Graphene Film

[0031] Immerse the graphene / copper foil obtained in step 1 into a solution containing a catalyst precursor, then put it into a tube furnace and heat it to the growth temperature under a mixed atmosphere of argon and hydrogen, and use a chemical vapor deposition process to grow carbon nanotube...

Embodiment 1

[0044] (1) Preparation of materials

[0045] Using copper foil as a template, graphene is grown by chemical vapor deposition process. The process conditions are: methane as carbon source, reaction temperature 900°C, methane 80mL / min, argon flow 300mL / min, hydrogen flow 400mL / min, reaction time 20min Then cool down with the furnace to obtain graphene / copper foil.

[0046] The graphene / copper foil was immersed in an aqueous solution containing ferrous sulfate (1g / mL), and then placed in a tube furnace to grow carbon nanotubes by chemical vapor deposition. The process conditions were: the growth temperature was 1000 °C, and the ethanol The carbon source is injected into the quartz tube by injection, the injection rate is 0.2mL / min, the flow rate of argon gas is 400mL / min, the flow rate of hydrogen gas is 100mL / min, and the graphene / carbon nanotube / copper foil is grown for 20min.

[0047] Preparation of selenium solution: deionized water 50mL, selenium 1.5g, fully stirred on a ma...

Embodiment 2

[0052] Using copper foil as a template, graphene is grown by chemical vapor deposition process. The process conditions are: methane as carbon source, reaction temperature 900°C, methane 90mL / min, argon flow 400mL / min, hydrogen flow 200mL / min, reaction time 20min Then rapidly cool down to room temperature at a cooling rate of 10°C / min to obtain graphene / copper foil. Compared with Example 1, the number of graphene film layers in Example 2 is lower. Subsequent steps are the same as in Example 1.

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Abstract

The preparation method of a copper foil-loaded sodium ion battery negative electrode material provided by the invention comprises the following steps: step 1, adopting a chemical vapor deposition process to grow a graphene film on the copper foil; step 2, the graphene obtained in step 1 Grow carbon nanotubes on the film to obtain graphene / carbon nanotubes / copper foil; step 3, put the graphene / carbon nanotubes / copper foil obtained in step 2 into an aqueous selenium solution for hydrothermal reaction to obtain graphene / carbon nanotubes Nanotube / copper foil; in the copper foil loaded sodium ion battery negative electrode material prepared by the present invention, graphene and carbon nanotubes play their respective advantages, making them show better electrochemical performance than any one, while selenium has High theoretical capacity, can greatly increase the initial discharge capacity of the battery. The copper foil loaded sodium ion battery negative electrode material can greatly improve the cycle performance of the battery, increase the battery capacity, enhance the inert ion conductivity of the negative electrode, and the like.

Description

technical field [0001] The invention belongs to the field of preparation of energy storage materials, and in particular relates to a preparation method and application of copper foil-loaded sodium ion battery negative electrode materials. Background technique [0002] Nowadays, there are many types of batteries, and due to environmental problems and increased energy consumption, new materials and energy sources have good prospects for development. Due to the huge consumption of lithium, it is far from meeting people's demand for energy storage. As an element in the same main group as lithium, sodium has a similar intercalation mechanism to lithium, and its reserves on the earth are much higher than lithium, so it has attracted widespread attention. Copper has excellent electrical conductivity, and the battery negative electrode material based on copper is bound to greatly increase the electrical conductivity of the material. Selenium is an ideal battery cathode material. C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/36H01M4/587H01M4/66H01M10/054H01M10/058B82Y30/00
CPCY02E60/10Y02P70/50
Inventor 杨艳玲左玉冯雷侯小江锁国权
Owner SHAANXI UNIV OF SCI & TECH
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