Lithium cobalt oxide positive electrode material and regeneration and repair method and application thereof
A positive electrode material and repair method technology, applied in the direction of positive electrodes, chemical instruments and methods, cobalt compounds, etc., can solve the problem of high cost, achieve the effect of simple method, high social and economic value, and good regeneration effect
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Embodiment 1
[0060] Embodiment 1-a kind of regenerative repair method of lithium cobalt oxide cathode material
[0061] A. Discharge the waste lithium battery to 2V, disassemble it in an inert gas environment, and obtain the positive plate;
[0062] B. Carry out a primary calcination of the positive electrode sheet at 430°C in a vacuum environment with a vacuum degree of -0.7Mpa, and the calcination time is 1h. During the calcination process, the waste gas generated in the vacuum environment is extracted and absorbed with lye;
[0063] C. Grinding and tertiary sieving the calcined positive electrode sheet to obtain the first material below 50 mesh, the second material of 50-300 mesh and the third material above 300 mesh;
[0064] D. Add Li to the third material 2 CO 3 Mixed to obtain a mixture, and the third material and Li 2 CO 3 The molar ratio is 1.05:1;
[0065] E. The mixture is subjected to secondary calcination at 850° C., and the calcination time is 8 hours, to obtain a lithiu...
Embodiment 2
[0070] Embodiment 2-a kind of regenerative repair method of lithium cobalt oxide cathode material
[0071] A. Discharge the waste lithium battery to 2V, disassemble it in an inert gas environment, and obtain the positive plate;
[0072] B. Carry out a primary calcination of the positive electrode sheet at 400°C in a vacuum environment with a vacuum degree of -0.1Mpa, and the calcination time is 3 hours. During the calcination process, the waste gas generated in the vacuum environment is extracted and absorbed with lye;
[0073] C. Grinding and tertiary sieving the calcined positive electrode sheet to obtain the first material below 50 mesh, the second material of 50-300 mesh and the third material above 300 mesh;
[0074] D. Add LiNO to the third material 3 Mix to obtain a mixture, and the third material and LiNO 3 The molar ratio is 1.2:1;
[0075] E. The mixture is subjected to secondary calcination at 700° C., and the calcination time is 12 hours, to obtain a lithium cob...
Embodiment 3
[0079] Embodiment 3-a kind of regenerative repair method of lithium cobalt oxide cathode material
[0080] A. Discharge the waste lithium battery to 2V, disassemble it in an inert gas environment, and obtain the positive plate;
[0081] B. Carry out a primary calcination of the positive electrode sheet at 550°C in a vacuum environment with a vacuum degree of -1Mpa, and the calcination time is 0.5h. During the calcination process, the waste gas generated in the vacuum environment is extracted and absorbed with lye;
[0082] C. Grinding and tertiary sieving the calcined positive electrode sheet to obtain the first material below 50 mesh, the second material of 50-300 mesh and the third material above 300 mesh;
[0083] D. Add LiOH to the third material for mixing to obtain a mixture, and the molar ratio of the third material to LiOH is 1:1;
[0084] E. The mixture is subjected to secondary calcination at 900° C., and the calcination time is 4 hours, to obtain a lithium cobaltat...
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