Preparation process of a sulfur-doped biomass porous carbon nanoelectrode material for long-cycle lithium-ion batteries
A lithium-ion battery and nano-electrode technology, which is applied in the field of preparation of biomass carbon materials, can solve problems such as limited resources and difficult control of sulfur content, and achieve the effects of simple preparation process, favorable wettability, and improved cycle life
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Embodiment 1
[0040] 1. Clean the tea leaves, which are wastes of biomass residue, with 1mol / L dilute sulfuric acid and alcohol in sequence, dry at 60°C for 6 hours, and then ball mill for 1 hour to obtain powder A;
[0041] 2. Weigh 1g of powdered A, add 30ml of sulfuric acid solution with a concentration of 0.5mol / L to A, and use the ultrasonic-magnetic stirring two-in-one stirring method at a frequency of 30KHz and a speed of 200r / min to stir for 10min to obtain B.
[0042]3. Transfer B to a hydrothermal induction kettle, and add copper foil with a length, width, and height of 4cm, 1cm, and 0.01cm as the induction source. Move the hydrothermal induction kettle into the hydrothermal induction heating equipment, raise the temperature from room temperature to 120°C with an induction frequency of 200KHz, and keep it warm for 20 minutes, then cool to room temperature, take out the copper foil, scrape off the resulting product and wash it with deionized water and ethanol After suction filtrati...
Embodiment 2
[0046] 1. Wash the coffee grounds, which is a waste of biomass residue, with 1mol / L dilute sulfuric acid and alcohol in sequence, dry at 70°C for 8 hours, and then ball mill for 2 hours to obtain powder A;
[0047] 2. Weigh 2g of powdery A, add 40ml of sulfuric acid solution with a concentration of 1.5mol / L to A, and use the ultrasonic-magnetic stirring two-in-one stirring method to stir at a frequency of 30KHz and a speed of 300r / min for 20min to obtain B.
[0048] 3. Transfer B to a hydrothermal induction kettle, and add copper foil with a length, width, and height of 4cm, 1cm, and 0.01cm as the induction source. Move the hydrothermal induction kettle into the hydrothermal induction heating equipment, raise the temperature from room temperature to 130°C with an induction frequency of 300KHz, and keep it warm for 30 minutes, then cool to room temperature, take out the copper foil, scrape off the resulting product and wash it with deionized water and ethanol After suction filt...
Embodiment 3
[0052] 1. Clean the bagasse, the waste of biomass residue, with 1mol / L dilute sulfuric acid and alcohol in sequence, dry at 80°C for 10 hours, and then ball mill for 3 hours to obtain powder A;
[0053] 2. Weigh 3g of powdered A, add 50ml of sulfuric acid solution with a concentration of 2.5mol / L to A, and use the ultrasonic-magnetic stirring two-in-one stirring method to stir at a frequency of 30KHz and a speed of 400r / min for 30min to obtain B.
[0054] 3. Transfer B to a hydrothermal induction kettle, and add copper foil with a length, width, and height of 4cm, 1cm, and 0.01cm as the induction source. Move the hydrothermal induction kettle into the hydrothermal induction heating equipment, raise the temperature from room temperature to 140°C with an induction frequency of 400KHz, and keep it warm for 40 minutes, then cool to room temperature, take out the copper foil, scrape off the resulting product and wash it with deionized water and ethanol After suction filtration, dry...
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