Method for producing lithium battery cathode material lithium titanate
A negative electrode material, lithium titanate technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of low conductivity and affect the charge and discharge performance of lithium titanate materials, and achieve uniform particle size distribution, reproducibility and consistency good performance and high cycle stability
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Embodiment 1
[0019] The preparation method of the lithium ion battery negative electrode material lithium titanate of the present embodiment comprises the following steps:
[0020] A: Put 200g TiO 2 Powder, 80g Li 2 CO 3 Put the powder into a ball mill for mixing and ball milling for 2 hours, heat up to 600°C at a heating rate of 5°C / min in an air atmosphere and pre-fire for 10 hours;
[0021] B: After cooling the pre-fired mixture, add 10g of copper oxide powder to the mixture, then raise the temperature to 900°C and react for 15 hours to obtain lithium titanate, a negative electrode material for lithium-ion batteries;
[0022] C: Cool the obtained lithium titanate to room temperature with the furnace, and then grind it to a powder with a particle size of 1-5 μm and store it.
[0023] The above-mentioned lithium titanate powder sample is analyzed through X-ray diffraction (instrument model is Philips X'PertPro Super X-ray diffractometer 2θ angle scan range is 10-80 degrees), get as ...
Embodiment 2
[0027] The preparation method of the lithium ion battery negative electrode material lithium titanate of the present embodiment comprises the following steps:
[0028] A: Put 200g TiO 2 Powder, 80g Li 2 CO 3 Put the powder into a ball mill for mixing and ball milling for 5 hours, heat up to 500°C at a heating rate of 8°C / min in an air atmosphere and pre-fire for 10 hours;
[0029] B: After cooling the pre-fired mixture, add 10g of zirconia powder to the mixture, then raise the temperature to 800°C and react for 24 hours to obtain lithium titanate, a negative electrode material for lithium-ion batteries;
[0030] C: Cool the obtained lithium titanate to room temperature with the furnace, and then grind it to a powder with a particle size of 1-5 μm and store it.
[0031] The battery was assembled and tested in the same manner as in Example 1. The lithium titanate prepared in this example had an initial discharge capacity of 173mAh / g at a discharge rate of 0.5C, and the materi...
Embodiment 3
[0033] The preparation method of the lithium ion battery negative electrode material lithium titanate of the present embodiment comprises the following steps:
[0034] A: Put 200g TiO 2 Powder, 80g Li 2 CO 3 Put the powder into a ball mill for mixing and ball milling for 5 hours, add 5g of manganese oxide powder, raise the temperature to 500°C at a heating rate of 8°C / min in an air atmosphere and pre-fire for 10 hours;
[0035] B: After cooling the pre-fired mixture, add 5g of manganese oxide powder to the mixture, then raise the temperature to 900°C and react for 24 hours to obtain lithium titanate, a negative electrode material for lithium-ion batteries;
[0036] C: Cool the obtained lithium titanate to room temperature with the furnace, and then grind it to a powder with a particle size of 1-5 μm and store it.
[0037] The battery was assembled and tested in the same manner as in Example 1. The lithium titanate prepared in this example had an initial discharge capacity o...
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