▎ 摘　　要

NOVELTY - The electrode (100) has an active material layer (108) placed over a conductive layer (103). The active material layer includes graphene (116) and an active material including a set of whiskers. The graphene is provided to be attached to a surface of the active material, and covers the active material including the whiskers, where proportion of elements except hydrogen and carbon included in the graphene or another graphene is lower than or equal to 15 atomic % or proportion of elements except carbon included in the former graphene or the latter graphene is lower than or equal to 30 atomic %. USE - Electrode e.g. positive electrode and negative electrode, for use in a power storage device e.g. lithium-ion secondary battery, lithium-ion capacitor and air cell, in an electronic appliance (all claimed). Uses include but are not limited to display device such as LCD device, LED device, electrophoresis display device, digital micromirror device (DMD), plasma display panel (PDP) and field emission display (FED), lighting device, desktop personal computer, laptop personal computer, DVD, mobile phone, portable game machine, portable information terminal, e-book reader, video camera, digital still camera, high-frequency heating appliance such as microwave oven, electric rice cooker and electric washing machine, air-conditioning system such as air conditioner, electric refrigerator, electric freezer, electric refrigerator-freezer, and medical electrical equipment such as dialyzer. ADVANTAGE - The electrode has better cycle characteristics and high charge/discharge capacity. The electrode prevents tripping of a breaker of a commercial power supply in use of the electric appliance by using the power storage device as an auxiliary power supply for supplying power which cannot be supplied enough by the commercial power supply. The electrode improves throughput. The electrode prevents pulverization and separation of the electrode due to repeating charge/discharge cycles. DETAILED DESCRIPTION - The active material is made of silicon. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a surface of an electrode for a power storage device. Electrode (100) Substrate (101) Conductive layer (103) Active material layer (108) Graphene (116)