NOVELTY - The electrode (101) has an active material layer (103) placed over a current collector (102). The active material layer is provided with active material particles, a conductive additive and a binder, where a surface of one of the active material particles includes a first region in contact with other active material particles, a second region in contact with the conductive additive and a third region in contact with the binder, and the surface of one of the active material particles except the first to third regions is in contact with film containing silicon oxide as a main component.    USE - Electrode e.g. positive electrode and negative electrode, for use in a power storage device e.g. non-aqueous secondary battery such as lithium-ion secondary battery, air cell and lithium-ion capacitor, in an electronic device (all claimed) e.g. portable information terminal such as cell phone, smartphone, laptop computer, portable music player and digital camera, in a semiconductor industry. Can also be used in a medical equipment, next-generation clean energy vehicle e.g. hybrid electric vehicle (HEV), electric vehicle (EV) and a plug-in hybrid electric vehicle (PHEV).    ADVANTAGE - The electrode minimizes electrochemical decomposition of electrolytic solution around the electrode in the lithium-ion secondary battery or the lithium-ion capacitor. The electrode improves long-term cycle performance of the lithium-ion secondary battery or the lithium-ion capacitor by minimizing decomposition reaction of the electrolytic solution as a side reaction of charge and discharge in repeated charge and discharge cycles of the lithium-ion secondary battery or the lithium-ion capacitor.    DETAILED DESCRIPTION - The active material particles contain graphite. An INDEPENDENT CLAIM is also included for a method for fabricating an electrode.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of an electrode.    Electrode (101)    Current collector (102)    Active material layer (103)