▎ 摘　　要

NOVELTY - The negative electrode (101) has a negative electrode active material layer (109) over and in contact with a current collector (107) of titanium. The active material layer has an active material particles of silicon, binder consisting of polyimide, and graphene and graphene oxide covering the particles. USE - Negative electrode for power storage device (claimed), such as lithium secondary battery. Used in, e.g., display devices of televisions, monitors, and the like, lighting devices, desktop personal computers and laptop personal computers, word processors, image reproduction devices which reproduce still images and moving images stored in recording media such as digital versatile disks, portable compact disk players, portable radios, tape recorders, headphone stereos, stereos, table clocks, wall clocks, cordless phone handsets, transceivers, portable wireless devices, cellular phones, car phones, portable game consoles, calculators, portable information terminals, electronic notebooks, e-book readers, electronic translators, audio input devices, video cameras, digital still cameras, electric shavers, high-frequency heating appliances such as microwave ovens, electric rice cookers, electric washing machines, electric vacuum cleaners, water heaters, electric fans, hair dryers, air-conditioning systems such as air conditioners, humidifiers, and dehumidifiers, dishwashers, dish dryers, clothes dryers, futon dryers, electric refrigerators, electric freezers, electric refrigerator-freezers, freezers for preserving nucleic acids, flashlights, tools such as chain saws, smoke detectors, and medical equipment such as dialyzers, industrial equipment such as guide lights, traffic lights, belt conveyors, elevators, escalators, industrial robots, power storage systems, and power storage devices for leveling the amount of power supply and smart grid, and moving objects such as electric vehicles, hybrid electric vehicles which include both an internal-combustion engine and a motor, plug-in hybrid electric vehicles, tracked vehicles in which endless tracks are substituted for wheels of these vehicles, motorized bicycles including motor-assisted bicycles, motorcycles, electric wheelchairs, golf carts, boats, ships, submarines, helicopters, aircraft, rockets, artificial satellites, space probes, planetary probes, and spacecraft. ADVANTAGE - Provides the lithium secondary battery with high reliability by suppressing electrode deterioration. Enables the electrode to be formed using reduced number of steps. Provides the battery with good electric characteristics by dispersing uniformly reduced graphene oxide. DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view of a negative electrode. Negative electrode (101) Current collector (107) Negative electrode active material layer (109)