A kind of single crystal high-nickel positive electrode material and its preparation method and application
A positive electrode material, high nickel technology, applied in the field of single crystal high nickel positive electrode material and its preparation, can solve the problems of lower residual alkali content and pH value, lower battery capacity, poor battery performance, etc., to reduce gas production and increase rate performance, the effect of improving cycle performance
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Embodiment 1
[0050] This embodiment provides a single crystal high nickel positive electrode material, the preparation method of the single crystal high nickel positive electrode material is as follows:
[0051] (1) Take Ni 0.83 co 0.11 mn 0.06 (OH) 2 and lithium hydroxide, according to lithium / metal = 1.03:1, weighed into the high-speed mixing equipment, and then added 0.1% nano-zirconia, mixed at 1000rpm for 20min, at an oxygen flow rate of 10 L / min, at 3 ℃ / min The heating rate is raised to 850°C, sintered for 10 hours, cooled to room temperature, crushed and passed through a 300-mesh sieve to obtain a first-fired material;
[0052] (2) Mix the one-fired material obtained in step (1) with titanium oxide and cobalt tetroxide at a mass ratio of 1:0.003:0.008, and heat up to 800°C at an oxygen flow rate of 10 L / min at a heating rate of 3°C / min. Sintering for 15 hours, cooling to room temperature, crushing, and passing through a 300-mesh sieve to obtain the single-crystal high-nickel ...
Embodiment 2
[0056] This embodiment provides a single crystal high nickel positive electrode material, the preparation method of the single crystal high nickel positive electrode material is as follows:
[0057] (1) Take Ni 0.8 co 0.1 mn 0.1 (OH) 2 and lithium hydroxide, according to the lithium / metal ratio of 1:1, add it into the high-speed mixing equipment, then add 0.15% nano-tungsten oxide and mix it at 1500rpm for 20min, with the oxygen flow rate at 12 L / min and the temperature rising at 4°C / min Raise the temperature to 900°C, sinter for 8 hours, cool to room temperature, crush and pass through a 400-mesh sieve to obtain a sintered material;
[0058] (2) Mix the one-fired material obtained in step (1) with titanium hydroxide and cobalt chloride at a mass ratio of 1:0.005:0.012, and heat up to Sintering at 750° C. for 12 hours, cooling to room temperature, crushing, and passing through a 400-mesh sieve to obtain the single-crystal high-nickel positive electrode material.
Embodiment 3
[0060] The only difference between this embodiment and embodiment 1 is that the sintering temperature in step (1) is 800° C., and other conditions and parameters are exactly the same as those in embodiment 1.
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