Patent ID: 11955634
Assignee: ADVANCED LITHIUM ELECTROCHEMISTRY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC C  H  Y | IPC H

Claim 0:
1. A preparation method of a particle structure of cathode material, comprising steps of:
(a) providing a precursor configured to form a core, wherein the precursor comprises at least nickel, cobalt and manganese;
(b) providing a metal salt and a lithium ion compound, wherein the metal salt comprises at least potassium, aluminum and sulfur;
(c) mixing the metal salt, the lithium ion compound and the precursor to form a mixture; and
(d) subjecting the mixture to a heat treatment step to form the particle structure of cathode material, wherein the particle structure of cathode material comprises the core, a first coating layer and a second coating layer, wherein the core comprises potassium, aluminum and a Li-M-O based material, wherein M is one selected from the group consisting of nickel, cobalt, manganese, magnesium, titanium, aluminum, tin, chromium, vanadium, molybdenum and a combination thereof, wherein the first coating layer is coated on the core, and the second coating layer is coated on the first coating layer, wherein the first coating layer comprises potassium and aluminum, and a potassium content of the first coating layer is higher than a potassium content of the core, wherein the second coating layer comprises sulfur.