Method for preparing and recovering ternary anode material from waste nickel-cobalt-manganese ternary lithium ion batteries
A technology for nickel-cobalt-manganese-lithium and ion batteries is applied in the field of preparing nickel-cobalt-manganese ternary positive electrode materials, which can solve the problems of complex process and low electrical performance of products, and can shorten the process flow, improve the electrochemical performance, and achieve high repeatability. Effect
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[0075] Example 1:
[0076] Disassemble the core of the waste ternary lithium ion battery after safe discharge. After the core is broken, the core is first placed in the air and roasted at 400℃ for 5h, the heating rate is 5℃ / min, and then chlorine gas is introduced at 600℃. Roast for 3h. Sieving the active material and the pole piece, and leaching the powder (active material) in water. After the reaction is complete, filter out the black insoluble matter, add 2mol / L NaOH solution to the filtrate to adjust the pH=3, after the reaction is complete, filter the insoluble precipitate, and then add sodium thiosulfate until there is no more precipitation, filter again.
[0077] Determine the ratio of Ni, Co, Mn of the filtrate after removing impurities, and add the corresponding sulfates to it according to the ratio, adjust the ratio to 1:1:1, and then add 2mol / L NaOH solution to adjust the pH=10. After the reaction is complete, add sodium carbonate to it, control the added amount so
Example Embodiment
[0083] Example 2:
[0084] Disassemble the core of the waste ternary lithium ion battery after safe discharge. After the core is broken, it is first placed in the air and roasted at 500℃ for 3h, the heating rate is 10℃ / min, and then chlorine gas is introduced at 500℃. Roast for 3h. Sieving the active material and the pole piece, and leaching the powder (active material) in water. After the reaction is complete, filter out the black insolubles, add 5mol / L NaOH solution to the filtrate to adjust the pH=4, after the reaction is complete, filter the insoluble precipitate, and then add sodium thiosulfate until there is no more precipitation, filter again.
[0085] Determine the ratio of Ni, Co, Mn in the filtrate after removing impurities, and add the corresponding sulfates to it according to the ratio, adjust the ratio to 1:1:1, and then add 2mol / L NaOH solution to adjust the pH=10.5. After the reaction is complete, add sodium carbonate to it, control the addition amount so that L
Example Embodiment
[0086] Example 3:
[0087] Disassemble the core of the waste ternary lithium-ion battery after safe discharge. After the core is broken, the core is first placed in the air and roasted at 400℃ for 3h, the heating rate is 10℃ / min, and then sulfur dioxide is introduced at 300℃. Roast for 10h. Sieving the active material and the pole piece, and leaching the powder (active material) in water. After the reaction is completed, the black insoluble matter is filtered off, and 6 mol / L NaOH solution is added to the filtrate to adjust the pH=5. After the reaction is completed, the insoluble precipitate is filtered, and then sodium persulfate is added until there is no more precipitation, and then filtered again.
[0088] Determine the ratio of Ni, Co, Mn of the filtrate after removing impurities, and add the corresponding sulfates to it according to the ratio, adjust the ratio to 1:1:1, and then add 6mol / L NaOH solution to adjust the pH=11. After the reaction is complete, add sodium carb
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