Patent ID: 11929487
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method of preparing a negative electrode for a lithium secondary battery, comprising:
forming a negative electrode mixture layer on a negative electrode current collector, wherein the negative electrode mixture layer comprises a negative electrode active material, and wherein the negative electrode active material comprises a carbon-based material and a silicon-based material;
disposing lithium metal powder on at least a part of the negative electrode mixture layer;
pressing the negative electrode mixture layer on which the lithium metal powder is disposed;
wetting the pressed negative electrode mixture layer with a first electrolyte solution; and
drying the wet negative electrode mixture layer,
wherein, in the disposition of the lithium metal powder, the lithium metal powder is disposed on at least a part of the negative electrode mixture layer in two or more pattern shapes, wherein each pattern shape is spaced apart from another pattern shape, and
wherein the area in which the lithium metal powder is disposed on the negative electrode mixture layer is 50 to 70% with respect to a total area of a surface of the negative electrode mixture layer, and
an average particle size (D50) of the lithium metal powder is 30 to 50 μm.