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
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[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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