Preparation method for lithium ion battery composite cathode material
A technology for lithium-ion batteries and negative electrode materials, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of reducing material structure stability, cycle stability, and ineffective effects, and achieves easy control of particle size and high The effect of specific capacity and flexible operation
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[0037] Example 1:
[0038] Weigh 2.383 g analytically pure tetrabutyl titanate (purity ≥99.0%) and dissolve it in 50 ml absolute ethanol, stir evenly to make a clear and transparent solution; according to the atomic ratio Li / Ti = 1.4, weigh 1.000 g lithium acetate (Purity≥99.0%), add to the clear solution, continue to stir until a uniform solution is formed; add 2 ml ammonia water dropwise to the solution, mix well, transfer the mixture to a 100 ml autoclave and place it in the oven, 180 o C heat preservation for 24 hours, cool to room temperature, wash the product with absolute ethanol, filter, and place in an oven for 80 o C drying to get Li 4 Ti 5 O 12 -TiO 2 Precursor; In an air atmosphere, heat the obtained precursor to 600 o C heat preservation for 2 hours, then cool to room temperature with the furnace to prepare Li 4 Ti 5 O 12 -TiO 2 Powder, of which TiO 2 In Li 4 Ti 5 O 12 -TiO 2 The content in the powder is about 23%; weigh 0.450 g Li 4 Ti 5 O 12 -TiO 2 Powder, 0.027 g o...
Example Embodiment
[0041] Example 2:
[0042] Weigh 2.383 g analytically pure tetrabutyl titanate (purity ≥99.0%) and dissolve it in 50 ml absolute ethanol, stir evenly to make a clear and transparent solution; according to the atomic ratio Li / Ti = 1.4, weigh 1.000 g lithium acetate (Purity≥99.0%), add to the clear solution, continue to stir until a uniform solution is formed; add 1 ml ammonia to the solution drop by drop, mix well, transfer the mixture to a 100 ml autoclave and place it in the oven, 180 o Keep C for 24 hours, cool to room temperature, wash the product with absolute ethanol, filter, and place it in an oven for 80 o C drying to get Li 4 Ti 5 O 12 -TiO 2 Precursor; In an air atmosphere, heat the obtained precursor to 600 o C heat preservation for 2 hours, then cool to room temperature with the furnace to prepare Li 4 Ti 5 O 12 -TiO 2 Powder, of which TiO 2 In Li 4 Ti 5 O 12 -TiO 2 The content in the powder is about 19%; weigh 0.450 g Li 4 Ti 5 O 12 -TiO 2 Powder, 0.026 g starch, mix t...
Example Embodiment
[0045] Example 3:
[0046] Weigh 2.383 g analytically pure tetrabutyl titanate (purity ≥99.0%) and dissolve it in 50 ml absolute ethanol, stir evenly to make a clear and transparent solution; according to atomic ratio Li / Ti = 1.2, weigh 0.857 g lithium acetate (Purity≥99.0%), add to the clear solution, continue to stir until a uniform solution is formed; add 2 ml ammonia water dropwise to the solution, mix well, transfer the mixture to a 100 ml autoclave and place it in the oven, 180 o C heat preservation for 24 hours, cool to room temperature, wash the product with absolute ethanol, filter, and place in an oven for 80 o C drying to get Li 4 Ti 5 O 12 -TiO 2 Precursor; In an air atmosphere, heat the obtained precursor to 600 o Keep C for 2 hours, then cool to room temperature with the furnace to prepare Li 4 Ti 5 O 12 -TiO 2 Powder, of which TiO 2 In Li 4 Ti 5 O 12 -TiO 2 The content in the powder is about 25%; weigh 0.450 g Li 4 Ti 5 O 12 -TiO 2 Powder, 0.044 g glucose, mix the t...
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