A kind of preparation method and equipment of tin-carbon negative electrode material for lithium ion battery
A lithium-ion battery and anode material technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems affecting the performance of tin-carbon composite lithium-ion battery anode materials, uneven dispersion of tin and carbon, and difficulty in practical industrial applications, etc. problems, to achieve the effect of easy industrial production, uniform dispersion and low manufacturing cost
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Embodiment 1
[0032] see figure 1 , the equipment used to prepare tin-carbon negative electrode materials for lithium-ion batteries, including a DC arc generating device, an arc reaction box, a liquid container 6, a pressure spray head 7, and a diffusion cooling chamber 8 for product collection;
[0033] The two output lines of the DC arc generating device are respectively provided with a tin rod conductive fixture 3; the DC arc generating device is covered in the arc reaction box 1. The box is cylindrical, and the arc reaction box 1 is connected to the reaction chamber 9 (the shape is a curved cylinder) and the diffusion cooling chamber 8 in the shape of a circular tube. The diameter ratio of the reaction chamber 9 and the diffusion cooling chamber 8 is 1. : 3. A three-phase 100kW autovoltage regulator is installed on the input cable of the DC arc generating device. When preparing the negative electrode material, the metal tin rod 2 is fixed on the tin rod conductive fixture 3 .
[0034...
Embodiment 2
[0043] The same equipment as in Example 1 was used.
[0044] Clamp two Φ4mm solder rods with a length of 400mm with the output end fixture of the DC welding machine, adjust the no-load voltage of the DC welding machine to 30V, and the arcing current to 300A, and prepare 5L of sucrose aqueous solution with a concentration of 70%wt. Container 6. Adopt GA-64 silent oil-free air compressor, power 2.4KW, displacement 472L / min.
[0045]Simultaneously open the tin rod arcing and spray head, make the vaporized tin react with the liquid mist of the sprayed sucrose aqueous solution, control the spray speed, and make the mass ratio of the gasified tin mass to the metered carbon in the sprayed sucrose aqueous solution Sn : C=1: 0.20 to 0.22.
[0046] The obtained product was ground in a ball mill for 4 hours, taken out, placed in a tube furnace and roasted at 1200°C for 4 hours under the protection of nitrogen, cooled and then pulverized and classified to obtain a Sn / C composite materia...
Embodiment 3
[0050] The same equipment as in Example 1 was used.
[0051] Clamp two Φ6mm solder rods with a length of 400mm with the output end fixture of the DC welding machine, adjust the no-load voltage of the DC welding machine to 50V, and the arc starting current to 600A, and prepare hydroxypropyl modified with a concentration of 60%wt. Starch aqueous solution 7L adds in the liquid container 6. Adopt GA-64 silent oil-free air compressor, power 2.4KW, displacement 472L / min.
[0052] Simultaneously turn on the arcing of the tin bar and the spray head to make the vaporized tin contact and react with the liquid mist of the sprayed modified starch aqueous solution, and control the spray speed so that the mass of the vaporized tin and the metered carbon in the sprayed modified starch aqueous solution The mass ratio of Sn:C=1:0.05~0.07.
[0053] The obtained product was ground in a ball mill for 4 hours, taken out, placed in a tube furnace and roasted at 1500°C for 3 hours under nitrogen p...
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