NOVELTY - An active-material component (51) is formed in the surface of a collector (52) containing copper as main component, to obtain a negative electrode (100). Silicon oxide is contained in the portion located at the interface (S) vicinity with surface of collector among active-material components. The atomic ratio of oxygen with respect to temperature of collector during formation of active-material component, and silicon of silicon oxide of portion located in interface vicinity among active-material components is adjusted to satisfy specific conditions.    USE - Manufacture of negative electrode (claimed) for lithium secondary batteries and capacitors of ion-transfer type. Uses include but are not limited to mobile information terminals, portable electronic devices, domestic small electric-power storage apparatuses, two-wheeled motor vehicles, electric vehicles, and hybrid electric vehicles.    ADVANTAGE - The method enables manufacture of negative electrodes having excellent adhesive force with respect to collector and active-material component. The obtained negative electrode provides lithium secondary batteries having excellent charging/discharging cycle characteristics. Electrical connection of collector and active-material component is ensured.    DETAILED DESCRIPTION - An active-material component is formed in the surface of a collector containing copper as main component, to obtain a negative electrode. Silicon oxide is contained as a main component in the portion located at the interface vicinity with the surface of collector among the active-material components. The atomic ratio (x, greater than 0 and 2 or less) of oxygen with respect to the temperature (T: 300-500 degrees C) of the collector during formation of active-material component, and silicon of silicon oxide of the portion located in the interface vicinity among the active-material components is adjusted to satisfy the conditions given by, x = (8.3x 10-6x T2-5.5x 10-3x T+1.6) or more, and x = (1.2x 10-5x T2-3.6x 10-3x T+0.89) or less.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the negative electrode.    Active-material component (51)    Collector (52)    Negative electrode (100)    Interface (S)