Lithium ion battery negative electrode bamboo charcoal material prepared from natural product
A lithium-ion battery and natural product technology, applied in the field of lithium-ion batteries, can solve problems affecting electrochemical performance and achieve excellent cycle performance, high safety, and good tolerance
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[0017] Example 1:
[0018] (1) Pre-burn bamboo charcoal at 450℃ for 48 hours;
[0019] (2) The pre-burned bamboo carbon material is crushed to an average particle size of 2mm, and then the material is placed in a ball milling tank to control the quality of the ball and the material at 15:1, and the ball mill is at a rotation rate of 400 rpm for 1 hour, and the ball is milled The average particle size is 7μm;
[0020] (3) Put the bamboo carbon particles obtained in step (2) into sulfuric acid and heat to a constant temperature of 80°C and stir for 18 hours. The ratio of bamboo carbon to sulfuric acid is 1:30 (w / v) and the sulfuric acid concentration is 98%. The treated bamboo The carbon is washed with deionized water until the lotion is neutral, and dried at 80°C;
[0021] (4) Add the bamboo charcoal obtained in step (3) to 50% of its mass fullerene for high-temperature calcination. The calcination temperature is 900°C, the calcination time is 5 hours, the calcination atmosphere is ni...
Example Embodiment
[0022] Example 2:
[0023] (1) Pre-burning bamboo charcoal at 430℃ for 50 hours;
[0024] (2) Crush the pre-fired bamboo carbon material to an average particle size of 3mm, and then place the material in a ball milling tank to control the quality of the ball and material at 15:1, and ball mill at a rotation rate of 400 rpm for 1 hour. The average particle size is 7μm;
[0025] (3) Put the bamboo carbon particles obtained in step (2) into sulfuric acid and heat to 60°C and stir for 20 hours. The ratio of bamboo carbon to sulfuric acid is w / v=1:33, and the sulfuric acid concentration is 95%. The treated bamboo carbon Wash with deionized water until the lotion is neutral, and dry at 60°C;
[0026] (4) Add the bamboo charcoal obtained in step (3) to 80% of its mass fullerene for high temperature calcination. The calcination temperature is 880°C, the calcination time is 5.2 hours, the calcination atmosphere is nitrogen, and the heating rate is 1°C / min to obtain the final product.
Example Embodiment
[0027] Example 3:
[0028] (1) Pre-burning bamboo charcoal at 460℃ for 45 hours;
[0029] (2) Crush the pre-fired bamboo carbon material to an average particle size of 3mm, and then place the material in a ball milling tank to control the quality of the ball and material at 15:1, and ball mill at a rotation rate of 400 rpm for 1 hour. The average particle size is 7μm;
[0030] (3) Put the bamboo charcoal particles obtained in step (2) into sulfuric acid and heat to 90°C and stir for 16 hours. The ratio of bamboo charcoal to sulfuric acid is w / v=1:25, and the concentration of sulfuric acid is 95%. The treated bamboo charcoal Wash with deionized water until the lotion is neutral, and dry at 50°C;
[0031] (4) Add the bamboo charcoal obtained in step (3) to 70% of its mass fullerene for high-temperature calcination. The calcination temperature is 920°C, the calcination time is 4.8 hours, the calcination atmosphere is nitrogen, and the heating rate is 1°C / min to obtain the final product...
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