Method for directly regenerating lithium cobaltate from materials containing lithium cobaltate
A technology containing lithium cobalt oxide and lithium cobalt oxide, which is applied in waste collector recycling, electrolysis components, electrolysis process, etc., can solve the problems of high environmental risk, long process, high cost, etc., and achieve low environmental risk, small consumption, and high variety little effect
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Embodiment 1
[0022] A method for directly regenerating lithium cobaltate from materials containing lithium cobaltate, comprising the steps of:
[0023] 1. Pretreatment: put the spent lithium cobalt oxide battery in 10% sodium chloride solution, soak for 24 hours, and dry. Then use a shear crusher to crush the waste lithium cobalt oxide battery, sieve the crushed material with a 0.5 mm standard sieve, and take the undersized material as the raw material for the next experiment. The composition analysis results are as follows: Li: 6.32%, Co: 44.98%;
[0024] 2. Weigh 0.5 g of raw material and put it into the anode chamber of the electrochemical reactor, and add 250 mL of electrolyte solution containing 2.5 mol / L ammonium bicarbonate, 1 mol / L ammonium sulfite and 2.5 g sodium fluoride at the same time for electrolysis; The electrolysis conditions are as follows: the graphite electrolytic plate is the anode, the titanium-based platinum-coated electrode plate is the cathode, and the current de...
Embodiment 2
[0028] A method for directly regenerating lithium cobaltate from materials containing lithium cobaltate, comprising the steps of:
[0029] 1. Pretreatment: Take the leftovers of lithium cobalt oxide battery positive electrode sheet and dry them in an oven; then put them into NMP solvent, stir them vigorously at 90°C, and the reaction time is 30 minutes, then filter them with suction and dry them Obtain spent lithium cobalt oxide cathode material;
[0030] 2. Weigh 0.5 g of raw materials into the anode chamber of the electrochemical reactor, and add 250 mL of electrolyte solution containing 2.5 mol / L ammonium bicarbonate, 0.5 mol / L ammonium sulfite and 2 g of sodium fluoride at the same time for electrolysis; The electrolysis conditions are as follows: the graphite electrolytic plate is the anode, the titanium-based platinum-plated electrode plate is the cathode, and the current density is 0.1 A / cm 2 , temperature 40°C, electrolysis for 120 min;
[0031] 3. After the electrol...
Embodiment 3
[0034] A method for directly regenerating lithium cobaltate from materials containing lithium cobaltate, comprising the steps of:
[0035] 1. Pretreatment: put the waste lithium cobalt oxide battery in 10% sodium chloride solution, soak for 24 hours, dry, and then manually disassemble the discharged waste lithium cobalt oxide battery to obtain lithium cobalt oxide The positive electrode film is then placed in a 600°C muffle furnace for calcination for 0.5 h, and the calcined residue is taken out after cooling, and the powder on the collector foil is scraped off to obtain lithium cobalt oxide powder;
[0036] 2. Weigh 0.5 g of lithium cobalt oxide powder and put it into the anode chamber of the electrochemical reactor, and add 250 mL of electrolyte containing 2 mol / L ammonium bicarbonate, 1 mol / L ammonium sulfite and 1.5 g sodium fluoride , for electrolysis; the electrolysis conditions are as follows: the graphite electrolytic plate is the anode, the titanium-based platinum-pla...
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