Lithium titanate material and preparation method thereof, electrode pole piece and battery using same
A lithium titanate, lithium source technology, applied in nanotechnology, battery electrodes, secondary batteries, etc. for materials and surface science, can solve the problems of poor cycle performance, complex preparation process, and high energy consumption of lithium titanate materials , to achieve the effect of stable cycle performance, simple preparation process and low energy consumption
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[0025] see figure 1 , the present invention provides a preparation method of lithium titanate material, the lithium titanate material is mainly used in the electrode of lithium ion battery (not shown in the figure), which comprises the following steps:
[0026] Step S1, mixing a titanium compound with an alkaline solution containing peroxide ions to obtain a precursor solution A;
[0027] Specifically, first mix the alkaline solution, peroxide and solvent uniformly according to a preset ratio to obtain a mixed solution with a pH>7, then add the titanium compound into the mixed solution and stir to completely dissolve the titanium compound, Precursor solution A is obtained. The ratio of the amount of the substance of the peroxide to the amount of the substance of the titanium element in the titanium compound is greater than or equal to 1:1.
[0028] Wherein, the alkaline solution includes but not limited to one or more of ammonia water, sodium hydroxide, aniline, and methylam...
Embodiment 1
[0041] Mix 30 mL of deionized water, 18 mL of ammonia water with a mass fraction of 25% to 28%, and 12 mL of hydrogen peroxide with a mass fraction of 20% to 30% to obtain a mixed solution.
[0042] Add 0.5 g of titanium nitride into the above mixed solution, stir to dissolve it completely, and obtain precursor solution A.
[0043] Add 50ml of isopropanol with a mass fraction of 99.9% and 100ml of deionized water into the above precursor solution A and mix well, then add 0.3g of lithium fluoride and 50mg of glucose and mix well to completely dissolve lithium fluoride and glucose , Obtain light yellow milky precursor solution B.
[0044] The precursor solution B was placed at 100° C. for 15 hours to dry the precursor solution B to obtain a white lithium titanate precursor.
[0045] The lithium titanate precursor was placed in a furnace and sintered at 700° C. for 8 hours under an argon protective atmosphere. Then naturally cool down to room temperature with the furnace temper...
Embodiment 2
[0047] Mix 40 mL of deionized water, 12 mL of ammonia water with a mass fraction of 25% to 28%, and 12 mL of hydrogen peroxide with a mass fraction of 20% to 30% to obtain a mixed solution.
[0048] Add 0.25 g of titanium carbide into the above mixed solution, stir to completely dissolve the titanium carbide, and obtain precursor solution A.
[0049] Add 100ml of isopropanol with a mass fraction of 99.9% and 100ml of deionized water into the above precursor solution A and mix well, then add 0.3g of lithium hydroxide and 100mg of glucose and mix well to completely dissolve lithium hydroxide and glucose , Obtain light yellow milky precursor solution B.
[0050] Precursor solution B was placed at 80° C. for 36 hours to dry precursor solution B to obtain a white lithium titanate precursor.
[0051] The lithium titanate precursor was placed in a furnace and sintered at 700° C. for 5 hours under an argon protective atmosphere. Then naturally cool down to room temperature with the ...
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