A kind of ternary material with surface coated alumina and preparation method thereof
A surface coating, ternary material technology, applied in the direction of electrical components, electrochemical generators, structural parts, etc., can solve the problems of difficult condition control, reduced electrical performance, and large thermal energy consumption.
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[0037] The preparation method of the ternary material coated with aluminum oxide on the surface of the present invention comprises the following steps:
[0038] Put the alkaline ternary precursor slurry and aluminum salt solution into a reaction pipeline for mixing reaction, and then perform aging and solid-liquid separation to obtain a ternary precursor coated with aluminum hydroxide on the surface, and then cover the surface with A ternary precursor coated with aluminum hydroxide is mixed with a lithium source, and then the mixed material is sintered to obtain a ternary material coated with alumina on the surface.
[0039] see Figure 1-3 ,figure 1 is a schematic diagram of the reaction pipeline, figure 2 is a schematic diagram of the structure of the sub-pipeline, image 3 for figure 2 Schematic diagram of direction A.
[0040] The reaction pipeline is composed of 10-20 sections of pipelines 1 connected in series through flanges 2, specifically, 20 sections of pipelin...
Embodiment 1
[0045] In this embodiment, a ternary material coated with alumina is prepared, and the steps are as follows:
[0046] (1) According to the molar ratio of Ni:Co:Mn=6:2:2, the soluble salt of nickel, cobalt, manganese and water are formulated into the mixed salt solution that the total concentration of metal ions is 1-2mol / L for subsequent use, and the preparation quality A sodium hydroxide solution with a concentration of 24% is used for later use, an ammonia solution with a mass concentration of 25% is prepared for later use, and aluminum sulfate, aluminum nitrate or aluminum chloride and water are prepared into an aluminum salt solution with an aluminum ion concentration of 0.2-1mol / L for later use .
[0047] (2) First add 2500L mixed salt solution into the high-efficiency airtight synthesis reactor (5 cubic meters in size) as the bottom liquid, then continuously add the mixed salt solution with a flow rate of 360L / h, and add ammonia water and sodium hydroxide solution at the...
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