KETEP 세계에너지시장정보

A negative electrode for a lithium-ion secondary battery, having the following cross-sectional configuration, wherein: the cross-sectional configuration comprises a negative electrode current collector, a plurality of first layers, and a second layer; each of the first layers comprises a first negative electrode active material and a first conductive material; the first negative electrode active material comprises at least one of elemental silicon, a silicon alloy, and a silicon oxide; the second layer comprises a second negative electrode active material; the second negative electrode active material comprises graphite; the second layer does not comprise silicon; in the cross-sectional configuration, a surface of one side of the negative electrode current collector has a plurality of first regions and a second region between the first regions; in the cross-sectional configuration, the first layers are in contact with the respective first regions; and in the cross-sectional configuration, the second layer is in contact with both the second region and surfaces of one side of the first layers.