Single-crystal ternary positive electrode material, continuous preparation method and device and application
A cathode material, single crystal technology, applied in the field of single crystal ternary cathode material, can solve the problem of reuse of molten salt
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Embodiment 1
[0049] In this embodiment, a single crystal ternary positive electrode material and a continuous preparation method, the device used ( Figure 8 ) includes a lithium source crusher 1, a molten salt crusher 2, a heating reactor 3, a screen 6, a mixed molten salt recovery channel 5 and a pulverizer 4;
[0050] The lithium source breaker 1 and the flux salt breaker 2 are connected with the lithium source inlet and the flux salt inlet of the heating reactor 3; the heating reactor is provided with a reaction chamber, and a raw material inlet (including The above-mentioned lithium source inlet, fluxing salt inlet and mixed molten salt inlet) and product outlet; the screen cloth 6 is used to separate the mixed molten salt and product after the reaction; the mixed molten salt recovery channel 5 is not limited to be arranged on the heating In addition to the reactor 3, it can also be arranged in the heating reactor 3, and the two ends of the mixed molten salt recovery channel 5 communi...
Embodiment 2
[0058] Embodiment 2 comprises the following steps:
[0059] (1) Mix lithium hydroxide and lithium sulfate at a molar ratio of 6.5:1, and add the NCM811 precursor of the ternary cathode material after mixing; heat the mixed sample to 500°C for 3 hours in an oxygen atmosphere, and then heat it up to 950°C for sintering After 10 hours, the obtained sample was separated after cooling down; washed three times with deionized water to remove residual molten salt on the surface, and dried in an oven at 80°C for 12 hours.
[0060] (2) Re-fire the dried product at 700°C for 5 hours in an oxygen atmosphere to remove impurities brought during the washing process, and then obtain a single crystal NCM811 material.
[0061] (3) Assemble the button battery: mix the active material, acetylene black, and PVDF binder in a mass ratio of 8:1:1 to make a slurry, coat it on an aluminum foil with a thickness of 150 μm, and dry it in a vacuum oven overnight , and then made into a pole piece with a di...
Embodiment 3
[0065] Embodiment 3 comprises the following steps:
[0066] (1) Mix lithium hydroxide and lithium sulfate at a molar ratio of 7:1, then add the NCM811 precursor of the ternary cathode material after mixing; heat the mixed sample to 500°C for 3 hours in an oxygen atmosphere, and then heat it up to 950°C for sintering After 10 hours, the obtained sample was separated after cooling down; washed three times with deionized water to remove residual molten salt on the surface, and dried in an oven at 80°C for 12 hours.
[0067] (2) Re-fire the dried product at 700°C for 5 hours in an oxygen atmosphere to remove impurities brought during the washing process, and then obtain a single crystal NCM811 material.
[0068] (3) Assemble the button battery: mix the active material, acetylene black, and PVDF binder in a mass ratio of 8:1:1 to make a slurry, coat it on an aluminum foil with a thickness of 150 μm, and dry it in a vacuum oven overnight , and then made into a pole piece with a dia...
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Abstract
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