Patent ID: 8148012
Filing Date: 2012-04-03
Classification: H01M,Y02E

Abstract:
1. A method for manufacturing a negative electrode for a battery, the method comprising steps of: forming an active material layer on a surface of a current collector by a gas phase method, the active material layer including a metallic element M and an element A that is at least any one of oxygen, nitrogen and carbon; during the step of forming, irradiating the active material layer with an X ray; measuring at least one of intensity of a Kα ray of the element A and intensity of a Kα ray of the metallic element M in fluorescent X-rays generated from the active material layer; and adjusting a condition for forming the active material layer based on a first relationship between the intensity of the Kα ray of the element A and an oxidation number of the metallic element M or between the intensity of the Kα ray of the metallic element M and an oxidation number of the metallic element M, so as to match the oxidation number of the metallic element M in the active material layer to a predetermined value, wherein: the current collector is formed of a metal including at least any one of copper, nickel, titanium and iron, and the metallic element M is silicon, an attenuation amount of any one of a CuKα ray, a NiKα ray, a TiKα ray, and a FeKα ray, which are fluorescent X-rays of metals included in the current collector in fluorescent X-rays generated when at least one of the intensity of the Kα ray of the element A and the intensity of the Kα ray of the metallic element M is measured, is measured, and the condition for forming the active material layer is further adjusted based on a second relationship among an oxidation number of the metallic element M, an attenuation amount of any one of a CuKα ray, a NiKα ray, a TiKα ray and a FeKα ray, and a deposit amount of the active material layer per unit area of the current collector, so as to match the deposit amount to a predetermined value based on the attenuation amount.