Patent ID: 7662424

Claim:
A method of making a composite particle for an electrode, the method comprising a granulating step of integrating a conductive auxiliary agent and a binder adapted to bind the conductive auxiliary agent and an electrode active material together with a particle made of the electrode active material while in close contact with each other in an inert gas atmosphere so as to form a composite particle for an electrode containing the electrode active material, conductive auxiliary agent, and binder, wherein the granulating step comprises: a material liquid preparing step of preparing a material liquid containing the binder, the conductive auxiliary agent, and a solvent; a fluidizing step of putting a particle made of the electrode active material into a fluidizing tank and causing the particle made of the electrode active material to form a fluidized layer; and a spraying/drying step of spraying the material liquid into the fluidized layer containing the particle made of the electrode active material so that the material liquid is attached to the particle made of the electrode active material and is dried, so as to remove the solvent from the material liquid attached to a surface of the particle made of the electrode active material, and cause the binder to bring the particle made of the electrode active material and a particle made of the conductive auxiliary agent into close contact with each other.