Patent ID: 11876209
Assignee: GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC H

Claim 3:
4. A method for preparing the pre-lithiated lithium ion positive electrode material of claim 1, comprising:
(1) preparing a sulfate solution of A, then adding a precipitant and a complexing agent, and stirring and reacting to obtain a precursor slurry;
(2) subjecting the precursor slurry to centrifugation, drying, and sieving to obtain a precursor;
(3) mixing a lithium source with the precursor, and calcining and crushing to obtain a lithium ion positive electrode material; and
(4) adding the lithium ion positive electrode material to a pre-lithiation solution, and stirring, aging, drying, and tempering to obtain Li2O/[A(3-x)Mex]1/3-LiAO2, wherein the pre-lithiation solution comprises: a lithium source, Me and a conjugate, wherein Me is at least one of Ni, Mn, Al, Mg, Ti, Zr, Y, Mo, W, Na, Ce, Cr, Zn or Fe; and the conjugate is selected from a group consisting of a naphthalene-containing conjugate, citric acid conjugate or tartaric acid conjugate containing a hydroxyl+carboxyl combination, a carboxyl+carbon-carbon double bond combination, a hydroxyl+carbon-carbon double bond combination, a hydroxyl+carboxyl+carbon-carbon double bond combination, or a carbon-carbon double bond+carbonyl combination.