Preparation method of high-temperature graphite anode material for lithium-ion battery

[0015] A method for preparing a graphite negative electrode material for a high-temperature lithium-ion battery. First, weigh graphite, a solvent, and ammonia water in a ratio of 1g:0.5L:2mL, add them to a high-speed mixer, and disperse them for 1 hour at a speed of 500r / min to obtain a mixed mixture. Then, add titanate drop by drop, the ratio of the mixed slurry to titanate is 1g:2mL; then, after adding titanate, react in a water bath at 80°C for 5h, after the reaction is completed, wash with water and ethanol repeatedly 4 times, finally, dry in a drying oven at 80°C, put it in an atmosphere protection furnace for sintering after drying, raise the temperature to 400°C at a rate of 2°C / min and keep it for 18 hours to obtain a high-temperature lithium-ion battery Graphite anode material.

[0016] The graphite is natural graphite, the purity is above 99.999, and the particle size d50=10-20um.

[0017] The solvent is at least one of ethanol, propanol and butanol, and the purity

[0022] A preparation method of high-temperature lithium-ion battery graphite negative electrode material. First, weigh graphite, solvent, and ammonia water in a ratio of 1g:2L:10mL, add them to a high-speed mixer, and disperse them at a speed of 2000r / min for 0.5h to obtain a mixture. Then, add titanate drop by drop, the ratio of the mixed slurry to titanate is 1g:5mL; then, after adding titanate, react in a water bath at 80°C for 5h, and wash with water and ethanol repeatedly after the reaction is completed 4 times, finally, dry it in a drying oven at 100°C, put it in an atmosphere protection furnace for sintering after drying, raise the temperature to 800°C at a rate of 25°C / min and hold it for 4 hours to obtain a high-temperature lithium-ion battery Graphite anode material.

[0023] The graphite is natural graphite, the purity is above 99.999, and the particle size d50=10-20um.

[0024] The solvent is at least one of ethanol, propanol and butanol, and the purity is above

[0029] A method for preparing a high-temperature lithium-ion battery graphite negative electrode material. First, weigh graphite, solvent, and ammonia water in a ratio of 1g:1L:6mL, add them to a high-speed mixer, and disperse them at a speed of 1000r / min for 0.7h to obtain a mixture. Then, add titanate drop by drop, the ratio of the mixed slurry to titanate is 1g:3mL; then, after adding titanate, react in a water bath at 50°C for 60h, after the reaction is completed, wash with water and ethanol repeatedly 4 times, finally, dry it in a drying oven at 100°C, place it in an atmosphere protection furnace for sintering after drying, raise the temperature to 600°C at a rate of 15°C / min and hold it for 8 hours to obtain a high-temperature lithium-ion battery Graphite anode material.

[0030] The graphite is natural graphite, the purity is above 99.999, and the particle size d50=10-20um.

[0031] The solvent is at least one of ethanol, propanol and butanol, and the purity is above