METHOD OF MANUFACTURING NEGATIVE ELECTRODE ELEMENT FOR LITHIUM-ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode element for a lithium ion secondary battery having excellent cycle characteristics, a lithium ion secondary battery using the same, and to provide a method of manufacturing a lithium ion secondary battery.

SOLUTION: The negative electrode element for a lithium-ion secondary battery includes: a negative electrode current collector; and a negative electrode layer that includes an alloy active material layer formed on the negative electrode current collector and a resin layer formed on the surface of the alloy active material layer so as to have an opening that exposes a portion of the alloy active material layer on a surface of the alloy active material layer. The surface of the alloy active material layer, exposed to the opening, and a surface of the resin layer form a step so that the surface of the resin layer is more spaced apart from a surface of the negative electrode current collector than the exposed surface of the alloy active material layer.

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