Method for recycling waste lithium ion battery positive electrode material
A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of recycling waste lithium-ion battery materials, can solve the problems of high recycling costs, long process flow, and high energy consumption, and achieve high recycling costs, overcome high energy consumption, and long process flow Effect
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Embodiment 1
[0024] A method for recycling cathode materials of waste lithium ion batteries. The steps of the method described in this embodiment are:
[0025] Step 1: Discharging, disassembling, manual cutting or mechanical crushing of the waste lithium ion battery to obtain a positive electrode sheet.
[0026] Step 2: Mix the organic acid solution with a concentration of 0.1~1.5mol / L and a hydrogen peroxide solution with a concentration of 30wt% to obtain a mixed solution; wherein the mass concentration of hydrogen peroxide in the mixed solution is 0.5-3 %.
[0027] Step 3. According to the solid-to-liquid ratio of the positive electrode sheet and the mixed solution of 10~30g / L, add the positive electrode sheet to the mixed solution and stir for 90~120min under the water bath condition of 30~50℃ to obtain the mixture .
[0028] Step 4: Filter the mixture to obtain a filter residue containing aluminum foil and a filtrate containing valuable metal ions.
[0029] Step 5: Baking the filtrate at 50-...
Embodiment 2
[0034] A method for recycling cathode materials of waste lithium ion batteries. The steps of the method described in this embodiment are:
[0035] Step 1: Discharging, disassembling, manual cutting or mechanical crushing of the waste lithium ion battery to obtain a positive electrode sheet.
[0036] Step 2: Mix the organic acid solution with a concentration of 1.0~2.0mol / L and a hydrogen peroxide solution with a concentration of 30wt% to obtain a mixed solution; wherein the mass concentration of hydrogen peroxide in the mixed solution is 2-5 %.
[0037] Step 3. According to the solid-to-liquid ratio of the positive electrode sheet and the mixed solution of 20-50g / L, add the positive electrode sheet to the mixed solution and stir for 50-100min under the water bath condition of 40-60℃ to obtain the mixture .
[0038] Step 4: Filter the mixture to obtain a filter residue containing aluminum foil and a filtrate containing valuable metal ions.
[0039] Step 5. Baking the filtrate at 80-12...
Embodiment 3
[0044] A method for recycling cathode materials of waste lithium ion batteries. The steps of the method described in this embodiment are:
[0045] Step 1: Discharging, disassembling, manual cutting or mechanical crushing of the waste lithium ion battery to obtain a positive electrode sheet.
[0046] Step 2. Mix the organic acid solution with a concentration of 1.5~2.5mol / L and a hydrogen peroxide solution with a concentration of 30wt% to obtain a mixed solution; wherein the mass concentration of hydrogen peroxide in the mixed solution is 4-8 %.
[0047] Step 3. According to the solid-to-liquid ratio of the positive electrode sheet and the mixed solution of 40-60g / L, add the positive electrode sheet to the mixed solution, and stir for 30-60min under the water bath condition of 50-70℃ to obtain the mixture .
[0048] Step 4: Filter the mixture to obtain a filter residue containing aluminum foil and a filtrate containing valuable metal ions.
[0049] Step 5: Bake the filtrate at 100-150...
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