Method for preparing ternary material precursor and recovering lithium by using waste lithium ion battery ternary positive electrode material
A lithium-ion battery and cathode material technology, applied in the field of lithium recovery, can solve the problems of large loss and long lithium recovery route, and achieve the effects of low cost, high product quality and good economy
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Embodiment 1
[0046] The ternary positive electrode sheet and the ternary positive electrode sheet scraps separated from the dismantling and separation of waste lithium-ion batteries were roasted at 700°C for 10 minutes, and the roasted products obtained were crushed on a crusher and screened to obtain the ternary positive electrode material and aluminum foil; the ternary positive electrode sheet The molar ratios of nickel, cobalt and manganese in the ternary positive plate scrap are 5:2:3 and 6:2:2 respectively;
[0047] The ternary positive electrode material was leached with 2.5mol / L sodium hydroxide solution at 90°C for 30 minutes, the liquid-solid ratio of the sodium hydroxide solution to the ternary positive electrode material was 9:1 during leaching, and the filtrate and filter residue were obtained by filtration;
[0048] Add sodium carbonate whose molar number is 0.5 times the molar number of lithium ions in the filtrate, stir and react at 25°C for 60min, generate turbid liquid, fil...
Embodiment 2
[0057] The ternary positive electrode sheet and the ternary positive electrode sheet scraps separated from the dismantling and separation of waste lithium-ion batteries were roasted at 500°C for 30 minutes, and the roasted products obtained were crushed on a crusher and sieved to obtain the ternary positive electrode material and aluminum foil; the ternary positive electrode sheet The molar ratios of nickel, cobalt and manganese in the ternary positive plate scrap are 6:2:2 and 8:1:1 respectively;
[0058] The ternary positive electrode material was leached with 2.0mol / L potassium hydroxide solution at 80°C for 50 minutes, the liquid-solid ratio of the potassium hydroxide solution to the ternary positive electrode material was 7:1 during leaching, and the filtrate and filter residue were obtained by filtration;
[0059] Add potassium carbonate whose molar number is 0.5 times the molar number of lithium ions to the filtrate, stir and react at 50°C for 30min, generate a turbid li...
Embodiment 3
[0065] The ternary positive electrode sheet and the ternary positive electrode sheet scraps separated from the dismantling and separation of waste lithium-ion batteries were roasted at 600°C for 50 minutes, and the roasted products obtained were crushed on a crusher and sieved to obtain ternary positive electrode materials and aluminum foil; the ternary positive electrode sheet The molar ratio of nickel, cobalt and manganese in the ternary positive plate scrap is 6:2:2;
[0066] The ternary positive electrode material was leached with 1.5 mol / L sodium hydroxide solution at 85°C for 70 minutes, the liquid-solid ratio of the sodium hydroxide solution to the ternary positive electrode material was 11:1 during leaching, and the filtrate and filter residue were obtained by filtration;
[0067] Add sodium carbonate whose molar number is 0.5 times the molar number of lithium ions in the filtrate, stir and react at 60°C for 20min, generate a turbid liquid, filter to obtain lithium carb...
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