A method for removing sulfur and sodium from ternary precursor
A precursor, ternary technology, applied in chemical instruments and methods, electrical components, nickel compounds, etc., can solve the problem of high sodium content and sulfur content, achieve high-efficiency content, reduce content, and weaken the effect of interlayer force
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Embodiment 1
[0028] Example 1: Step 1: 1 t of newly produced NCM523 ternary precursor raw material with a particle size greater than 8 μm is separated from solid and liquid by a filter press and washed;
[0029] The second step: unload the sample treated in the first step to a storage area of 1 m 3 In a slurry tank of pure water, stir and soak for 3 h;
[0030] Step 3: Wash the samples treated in the second step with pure water once and once with caustic soda solution with a concentration of 0.35 mol / L;
[0031] Step 4: Wash the sample treated in the third step with pure water, dry it and send it for Na and S inspection;
Embodiment 2
[0032] Example 2: Step 1: 1 t of newly produced solid granular NCM523 ternary precursor raw material with a particle size larger than 8 μm is separated from solid and liquid by a filter press and washed;
[0033] The second step: unload the sample treated in the first step to contain 1 m 3 , in a slurry tank with a volume concentration of 30% formamide aqueous solution, stirring and soaking for 3 h;
[0034] Step 3: Wash the samples treated in the second step with pure water once and once with caustic soda solution with a concentration of 0.35 mol / L;
[0035] Step 4: Wash the sample treated in the third step with pure water and dry it for Na, S inspection;
Embodiment 3
[0036] Example 3: Step 1: 1 t of newly produced solid granular NCM523 ternary precursor raw material with a particle size of 10±0.5 μm is separated from solid and liquid by a filter press and washed;
[0037] The second step: wash the sample treated in the first step with a caustic soda solution with a concentration of 0.35 mol / L, and the washing temperature is 50°C;
[0038] The third step: wash the sample treated in the second step with pure water and dry it for Na, S inspection;
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