Method for forming positive electrode active material
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsYohei MOMMA, Teruaki OCHIAI, Mayumi MIKAMI, Jo SAITO, Masahiro TAKAHASHI
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Abstract
A method for forming a positive electrode active material of a lithium ion secondary battery is provided. In the method for forming a positive electrode active material, a first container that includes a mixture of lithium oxide, fluoride, and a magnesium compound and fluoride that is outside the first container are provided in a heating furnace, and the heating furnace is heated at a temperature higher than or equal to a temperature at which the fluoride is volatilized or sublimated. It is further preferable that the fluoride be lithium fluoride and the magnesium compound be magnesium fluoride.
Claims19
(canceled)
A method for forming a positive electrode active material, comprising:
- heating a heating furnace,
- wherein a first container and a first fluoride which is outside the first container are placed in the heating furnace when the heating furnace is heated,
- wherein the first container includes a mixture of lithium cobalt oxide, a second fluoride, a magnesium compound, and an aluminum compound, and
- wherein a temperature when the heating furnace is heated is higher than or equal to a temperature at which at least one of the first fluoride or the second fluoride is volatilized or sublimated.
A method for forming a positive electrode active material, comprising:
- heating a heating furnace,
- wherein a first container and a second container are placed in the heating furnace when the heating furnace is heated,
- wherein the first container includes a mixture of lithium cobalt oxide, a first fluoride, a magnesium compound, and an aluminum compound,
- wherein the second container includes a second fluoride, and
- wherein a temperature when the heating furnace is heated is higher than or equal to a temperature at which at least one of the first fluoride or the second fluoride is volatilized or sublimated.
A method for forming a positive electrode active material, comprising:
- heating a heating furnace,
- wherein a first container is placed in the heating furnace when the heating furnace is heated,
- wherein the first container comprises a first space, a second space, and a divider between the first space and the second space,
- wherein the first space includes a mixture of lithium cobalt oxide, a first fluoride, and a magnesium compound,
- wherein the second space includes a second fluoride, and
- wherein a temperature when the heating furnace is heated is higher than or equal to a temperature at which at least one of the first fluoride or the second fluoride is volatilized or sublimated.
Dependencies are inferred from the claim text.