Anode material for lithium-ion battery and negative plate of anode material
A technology for lithium ion batteries and negative electrode materials, which is applied in battery electrodes, circuits, electrical components, etc., can solve problems such as poor battery cycle performance, achieve high rate performance, simple and easy preparation methods, and improve cycle life effects.
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Embodiment 1
[0027] Coating treatment of natural graphite: Dissolve 950g of natural graphite and 50g of soft carbon in ethanol, mix and stir for 6h at a speed of 300r / min, filter, dry at 100°C for 13h, and mix the dried The powder was put into a muffle furnace under the protection of nitrogen and roasted at 375°C for 4 hours, and then cooled naturally to obtain soft carbon-coated natural graphite powder.
[0028] Preparation of negative electrode slurry: Dissolve 20g of sodium carboxymethylcellulose CMC in 1518g of deionized water, stir and disperse for 5 hours to obtain a CMC glue with a solid content of 1.3%, then add 15g of conductive carbon black and 15g of carbon nanofibers Stir and disperse in the CMC glue solution for 1 hour, then add 920g of additives, artificial graphite and soft carbon-coated natural graphite powder in 2 times on average, the amount added each time is 1 / 2 of the total amount, and the time interval between additions is 0.5h After stirring at high speed for 2 hours...
Embodiment 2
[0032] Coating treatment of natural graphite: Dissolve 980g of natural graphite and 20g of soft carbon in ethanol, mix and stir for 12h at a speed of 100r / min, filter, dry at 80°C for 16h, and mix the dried The powder was put into a muffle furnace under the protection of nitrogen and roasted at 400°C for 6h, and then cooled naturally to obtain soft carbon-coated natural graphite powder.
[0033] Preparation of negative electrode slurry: Dissolve 10g of sodium carboxymethylcellulose CMC in 1630g of deionized water, stir and disperse for 3 hours to obtain a CMC glue with a solid content of 1.2%, then add 5g of conductive carbon black and 5g of carbon nanofibers Stir and disperse in the CMC glue solution for 1.5h, and then add 960g of additives, artificial graphite and soft carbon-coated natural graphite powder in 3 times on average. The amount added each time is 1 / 3 of the total amount, and the adding time interval is 0.6 h, after stirring at high speed for 3 hours, add 30g styr...
Embodiment 3
[0037] Coating treatment of natural graphite: Dissolve 880g of natural graphite and 120g of soft carbon in ethanol, mix and stir for 4h at a speed of 500r / min, then filter, dry at 120°C for 12h, and mix the dried The powder was put into a muffle furnace under the protection of nitrogen and roasted at 250°C for 10 hours, and then cooled naturally to obtain soft carbon-coated natural graphite powder.
[0038]Preparation of negative electrode slurry: Dissolve 30g of carboxymethylcellulose sodium CMC in 2120g of deionized water, stir and disperse for 4 hours to obtain a CMC glue with a solid content of 1.5%, then add 10g of conductive carbon black and 10g of Ketjen black Stir and disperse in the CMC glue solution for 1 hour, then add 870g of additives, artificial graphite and soft carbon-coated natural graphite powder in 5 times on average, the amount added each time is 1 / 5 of the total amount, and the time interval between additions is 0.8h After 4 hours of high-speed stirring, 2...
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