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AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsYohei Momma, Jo Saito, Teruaki Ochiai, Mayumi Mikami
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To provide a method of forming a positive electrode active material with high productivity. To provide a manufacturing apparatus capable of forming a positive electrode active material with high productivity. Provided is a method of forming a positive electrode active material including lithium, a transition metal, oxygen, and fluorine. An adhesion preventing step is performed during heating of an object. Examples of the adhesion preventing step include stirring by rotating a furnace during the heating, stirring by vibrating a container containing an object during the heating, and crushing performed between the plurality of heating steps. By these manufacturing methods, a positive electrode active material having favorable distribution of an additive at the surface portion can be formed.
A rotary kiln successively processing an object put thereto, comprising a kiln main body, a mill, a first heating unit, a second heating unit, a first source material supply unit, a second source material supply unit, and an atmosphere control unit,
A kiln successively processing an object put thereto, comprising a kiln main body, a first mill, a second mill, a first heating unit, a second heating unit, and a source material supply unit,
Dependencies are inferred from the claim text.