公开(公告)号：US20230082842A1

公开(公告)日：2023-03-16

申请号：US17664298

申请日：2022-05-20

Applicant: Kunming University of Science and Technology

Inventor： Yingjie Zhang ,  Peng Dong ,  Qi Meng ,  Yannan Zhang ,  Zitong Fei ,  Chenchen Li ,  Lei Liu ,  Jin Yan

IPC: H01M10/54 ,  H01M10/0525 ,  H01M4/525

Abstract: The present disclosure describes a method for repairing a cathode material of a spent lithium-ion battery, which includes: mixing the cathode material of the spent lithium-ion battery, a lithium sheet, a solid oxidant and absolute ethanol under a protective atmosphere for repairing to obtain a repaired cathode material of the lithium-ion battery, where a temperature for the repairing is 20-70° C.; a ratio of the amount of substance of lithium atoms to the total amount of substance of other metal atoms in the cathode material of the spent lithium-ion battery is (0.5-1):1, excluding 1:1.

公开(公告)号：US11616226B2

公开(公告)日：2023-03-28

申请号：US17232241

申请日：2021-04-16

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yingjie Zhang ,  Peng Dong ,  Qi Meng ,  Siyuan Zhou ,  Qingxiang Li ,  Shaoqiang Zhou ,  Jianguo Duan ,  Xue Li ,  Yin Liu ,  Duanyun Chen

IPC: H01M4/36 ,  C01G51/00 ,  H01M4/525 ,  H01M10/052 ,  H01M10/54 ,  H01M4/02 ,  H01M4/58

Abstract: The disclosure discloses a method for preparing a high-voltage cathode material by body modification and regeneration of a waste lithium cobaltate material. The waste lithium cobaltate cathode material is calcined, and then measured; a lithium source, a magnesium source, nano-scale TiO2 and the waste lithium cobaltate cathode material powder are mixed to obtain a mixture, placed in a ball milling tank containing absolute ethanol, and the resulting mixture is ball milled, and then dried to obtain a mixed powder; the mixed powder is calcined to obtain a magnesium-titanium co-doped regenerated lithium cobaltate cathode material; the magnesium-titanium co-doped regenerated lithium cobaltate cathode material is added into a mixed solution obtained by ultrasonically mixing absolute ethanol with the aluminum source, and then heated and stirred continually until the solvent evaporates to obtain a residue; the residue is calcined to obtain an aluminum-coated magnesium-titanium co-doped regenerated lithium cobaltate cathode material.

公开(公告)号：US20210391568A1

公开(公告)日：2021-12-16

申请号：US17232241

申请日：2021-04-16

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Yingjie Zhang ,  Peng Dong ,  Qi Meng ,  Siyuan Zhou ,  Qingxiang Li ,  Shaoqiang Zhou ,  Jianguo Duan ,  Xue Li ,  Yin Liu ,  Duanyun Chen

IPC: H01M4/36 ,  C01G51/00 ,  H01M10/54 ,  H01M10/052 ,  H01M4/525

Abstract: The disclosure discloses a method for preparing a high-voltage cathode material by body modification and regeneration of a waste lithium cobaltate material. The waste lithium cobaltate cathode material is calcined, and then measured; a lithium source, a magnesium source, nano-scale TiO2 and the waste lithium cobaltate cathode material powder are mixed to obtain a mixture, placed in a ball milling tank containing absolute ethanol, and the resulting mixture is ball milled, and then dried to obtain a mixed powder; the mixed powder is calcined to obtain a magnesium-titanium co-doped regenerated lithium cobaltate cathode material; the magnesium-titanium co-doped regenerated lithium cobaltate cathode material is added into a mixed solution obtained by ultrasonically mixing absolute ethanol with the aluminum source, and then heated and stirred continually until the solvent evaporates to obtain a residue; the residue is calcined to obtain an aluminum-coated magnesium-titanium co-doped regenerated lithium cobaltate cathode material.