Patent ID: 11967710
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method for manufacturing an electrode, comprising:
mixing a first particle and a first piece of graphene oxide to form a second particle, the second particle covered with the first piece of graphene oxide;
reducing the first piece of graphene oxide to form a third particle, the third particle covered with a first piece of graphene oxide being reduced,
forming an active material layer over a current collector, the active material layer comprising the third particle and a second piece of graphene oxide;
impregnating the active material layer with alcohol; and
performing heat treatment on the active material layer after impregnating the active material layer,
wherein the third particle comprises an inner region and a surficial region after the heat treatment,
wherein the inner region comprises a crystal having a layered rock-salt crystal structure,
wherein the surficial region comprises a crystal having a spinel crystal structure, wherein the surficial region is in contact with a second piece of graphene oxide being reduced, and
wherein the heat treatment is performed at a temperature higher than or equal to 250° C. and lower than or equal to 300° C.