NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND INSPECTION METHOD FOR ITS NEGATIVE ELECTRODE, MANUFACTURING METHOD, INSPECTION DEVICE FOR NEGATIVE ELECTRODE, AND MANUFACTURING DEVICE

摘要

PROBLEM TO BE SOLVED: To manufacture a battery which controls an accumulated amount of a negative electrode active material when the negative electrode active material is formed on a current collector and has capacity with smaller variations.

SOLUTION: In an inspection method for a negative electrode of a nonaqueous electrolyte secondary battery, an X ray is irradiated on an active material layer made of a silicon compound wherein a dischargeable composition is known capable of electrochemically absorbing or releasing silicon or a lithium ion on a current collector 11 made of metal including at least either copper, nickel, titanium, or iron. Then, an attenuated amount of either a CuKα ray, a NiKα ray, a TiKα ray, or FeKα ray which is fluorescent X rays of metal included in the current collector among the fluorescent X-rays generated from the active material layer.

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