NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode for a lithium secondary battery having excellent cycle characteristics, and to provide its manufacturing method.

SOLUTION: The thin film negative electrode has an alloy thin-film active material layer of Sn alloyed with Li and a metal not alloyed with Li formed on one side or both sides of a copper or a copper alloy foil substrate. The half-value width of the maximum peak in X-ray diffraction method of the negative electrode active material using Cukα beam is 0.2-0.55° at 2θ.

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