Patent ID: 11901560
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 7:
8. A method for preparation of a negative electrode plate, comprising the steps of:
disposing a negative active material layer on at least one surface of a negative current collector, wherein the negative active material is artificial graphite;
depositing an inorganic dielectric material on a surface of the negative active material layer facing away from the negative current collector by vapor deposition, to obtain an inorganic dielectric layer including a first dielectric layer on an outer surface of the negative active material layer, wherein the inorganic dielectric material is alumina; and the first dielectric layer has a thickness of from 100 nm to 200 nm and a continuous layered structure;
wherein the negative electrode plate has a compact density of from 1.2 g/cm3 to 2.0 g/cm3, a porosity of from 25% to 45% and a wetting velocity of electrolyte on per 10 cm×10 cm area of from 2 μg/s to 2.2 μg/s.