Preparation method of lithium titanate coated lithium ion battery nickel cobalt manganese cathode material
A lithium titanate-coated, lithium-ion battery technology, applied to battery electrodes, batteries, circuits, etc., can solve the problems of long sintering time, increased material production costs, and complicated steps in high-temperature treatment processes, so as to reduce production processes and inhibit Irreversible capacity loss, effect of improving safety
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Embodiment 1
[0026] (1) Preparation of lithium titanate material:
[0027] At room temperature, dissolve lithium acetate, tetrabutyl titanate, and oxalic acid in an aqueous solution of absolute ethanol, stir and ultrasonically dissolve them completely; first slowly add the oxalic acid solution to the tetrabutyl titanate solution, and simultaneously Stir for about 30-40 minutes to obtain a white sol; then slowly add lithium acetate solution dropwise to the above white sol, and age to obtain a light yellow transparent gel or white gel; secondly, place the gel in a heating mantle and heat at 80°C Stir to obtain a white gel; place it in a blast drying oven at 80°C for 12 hours, and remove the solvent to obtain a white / light yellow xerogel. The precursor was treated at 600°C for 6 hours, and then at 800°C for 8 hours to obtain a lithium titanate negative electrode material;
[0028] (2) Preparation of lithium titanate coated nickel cobalt lithium manganese oxide
[0029] According to the mass...
Embodiment 2
[0040] (1) Preparation of lithium titanate material:
[0041] At room temperature, dissolve lithium acetate, tetrabutyl titanate, and oxalic acid in an aqueous solution of absolute ethanol, stir and ultrasonically dissolve them completely; first slowly add the oxalic acid solution to the tetrabutyl titanate solution, and simultaneously Stir for about 30-40 minutes to obtain a white sol; then slowly add lithium acetate solution dropwise to the above white sol, and age to obtain a light yellow transparent gel or white gel; secondly, place the gel in a heating mantle and heat at 80°C Stir to obtain a white gel; place it in a blast drying oven at 80°C for 12 hours, and remove the solvent to obtain a white / light yellow xerogel. The precursor was treated at 600°C for 6 hours, and then at 800°C for 8 hours to obtain a lithium titanate negative electrode material;
[0042] (2) Preparation of lithium titanate coated nickel cobalt lithium manganese oxide
[0043] According to the mass...
Embodiment 3
[0045] (1) Preparation of lithium titanate material:
[0046] At room temperature, dissolve lithium acetate, tetrabutyl titanate, and oxalic acid in an aqueous solution of absolute ethanol, stir and ultrasonically dissolve them completely; first slowly add the oxalic acid solution to the tetrabutyl titanate solution, and simultaneously Stir for about 30-40 minutes to obtain a white sol; then slowly add lithium acetate solution dropwise to the above white sol, and age to obtain a light yellow transparent gel or white gel; secondly, place the gel in a heating mantle and heat at 80°C Stir to obtain a white gel; place it in a blast drying oven at 80°C for 12 hours, and remove the solvent to obtain a white / light yellow xerogel. The precursor was treated at 600°C for 6 hours, and then at 800°C for 8 hours to obtain a lithium titanate negative electrode material;
[0047] (2) Preparation of lithium titanate coated nickel cobalt lithium manganese oxide
[0048] According to the mass...
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