Method for recycling waste lithium cobaltate positive electrode
A recovery method, lithium cobalt oxide technology, which is applied in the field of recovery of waste lithium cobalt oxide positive electrode, can solve problems such as not being able to effectively recover lithium cobalt oxide
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Embodiment 1
[0055] (1) will contain 0.004mol LiCoO 2 The lithium cobaltate positive electrode is mixed with the acidic solution of hydrogen peroxide with a pH value of 3, and the molar weight of the hydrogen peroxide is 0.006mol to obtain a mixed solution; the mixed solution is mixed with 0.0065mol LiNO 3 , 0.006mol Fe(NO 3 ) 3 , 0.01mol NH 4 h 2 PO 4 , 0.01mol C 6 h 8 o 7 After mixing, heat up to 80°C and stir at 80°C until dry to obtain the first precursor;
[0056] (2) ball mill the first precursor at 500r / min for 12h, then dry the product obtained by ball milling, and then calcinate it in an argon atmosphere at 350°C for 3h to obtain the second precursor; during the ball milling process, The mass ratio of the ball to the first precursor is 20:1, and the dispersant used for ball milling is acetone;
[0057] (3) Mix the second precursor and citric acid according to the mass ratio of 2:1, ball mill at 500r / min for 12h, and then dry the product obtained by ball milling, and then ...
Embodiment 2
[0064] (1) will contain 0.008mol LiCoO 2 The lithium cobaltate positive electrode is mixed with the acidic solution of hydrogen peroxide with a pH value of 3, and the molar weight of the hydrogen peroxide is 0.012mol to obtain a mixed solution; the mixed solution is mixed with 0.013mol LiNO 3 , 0.012mol Fe(NO 3 ) 3 , 0.02mol NH 4 h 2 PO 4 , 0.02mol C 6 h 8 o 7 After mixing, heat up to 80°C and stir at 80°C until dry to obtain the first precursor;
[0065] (2) ball mill the first precursor at 500r / min for 12h, then dry the product obtained by ball milling, and then calcinate it in an argon atmosphere at 350°C for 3h to obtain the second precursor; during the ball milling process, The mass ratio of the ball to the first precursor is 20:1, and the dispersant used for ball milling is acetone;
[0066] (3) Mix the second precursor and citric acid according to the mass ratio of 2:1, ball mill at 500r / min for 12h, and then dry the product obtained by ball milling, and then c...
Embodiment 3
[0069] (1) will contain 0.012mol LiCoO 2 The lithium cobaltate positive electrode is mixed with the acidic solution of hydrogen peroxide with a pH value of 3, and the molar weight of the hydrogen peroxide is 0.018mol to obtain a mixed solution; the mixed solution is mixed with 0.0195mol LiNO 3 , 0.018mol Fe(NO 3 ) 3 , 0.03mol NH 4 h 2 PO 4 , 0.03mol C 6 h 8 o 7 After mixing, heat up to 80°C and stir at 80°C until dry to obtain the first precursor;
[0070] (2) ball mill the first precursor at 500r / min for 12h, then dry the product obtained by ball milling, and then calcinate it in an argon atmosphere at 350°C for 3h to obtain the second precursor; during the ball milling process, The mass ratio of the ball to the first precursor is 20:1, and the dispersant used for ball milling is acetone;
[0071] (3) Mix the second precursor and citric acid according to the mass ratio of 2:1, ball mill at 500r / min for 12h, and then dry the product obtained by ball milling, and then ...
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