Method for preparing carbon-coated nano lithium titanate by rheological phase reaction
A nano-lithium titanate and carbon coating technology, applied in nano-carbon, nano-technology, nano-technology and other directions, can solve the problems of poor material rate performance, and achieve the effects of good rate performance, low synthesis temperature and uniform distribution
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Embodiment 1
[0023] a. Weigh Li according to the molar ratio of lithium and titanium elements of 0.84:1 2 CO 3 and anatase TiO 2 , and added 2wt% of PVB (2% of the mass of theoretically synthesized lithium titanate), ball milled in a mixing tank at a speed of 400 rpm for 6 hours.
[0024] b. Add an appropriate amount of absolute ethanol solvent, stir slowly, adjust the mixture to a colloidal rheological state, and then dry it in a vacuum oven at 80° C. for 6-12 hours to obtain a precursor.
[0025] c. Place the precursor in a tube furnace, program the temperature in a nitrogen atmosphere, raise the temperature to 900°C at 5°C / min, keep it for 12 hours, and cool it down to room temperature naturally to obtain a carbon-coated nano-lithium titanate material.
Embodiment 2
[0027] a. Weigh Li according to the molar ratio of lithium and titanium elements of 0.83:1 2 CO 3 and anatase TiO 2 , and added 6wt% PVB (6% of the mass of theoretically synthesized lithium titanate), ball milled in a mixing tank at a speed of 400 rpm for 8 hours.
[0028] b. Add an appropriate amount of absolute ethanol solvent, stir slowly, adjust the mixture to a colloidal rheological state, and then dry it in a vacuum oven at 80° C. for 6-12 hours to obtain a precursor.
[0029] c. Place the precursor in a tube furnace, program the temperature in a nitrogen atmosphere, raise the temperature to 850°C at 5°C / min, keep it for 14 hours, and cool it down to room temperature naturally to obtain a carbon-coated nano-lithium titanate material.
Embodiment 3
[0031] a. Weigh Li according to the molar ratio of lithium and titanium elements of 0.85:1 2 CO 3 and anatase TiO 2 , and added 10wt% PVB (10% of the theoretically synthesized lithium titanate mass), ball milled in a mixing tank at a speed of 400 rpm for 8 hours.
[0032] b. Add an appropriate amount of absolute ethanol solvent, stir slowly, adjust the mixture to a colloidal rheological state, and then dry it in a vacuum oven at 80° C. for 6-12 hours to obtain a precursor.
[0033] c. Put the precursor in a tube furnace, program the temperature in a nitrogen atmosphere, raise the temperature to 800°C at 5°C / min, keep it warm for 16 hours, and cool it down to room temperature naturally to obtain a carbon-coated nano-lithium titanate material.
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