▎ 摘　　要

NOVELTY - Secondary battery comprises a negative electrode (100) comprising a current collector (101) provided with graphite, where the graphite comprises graphene layers (103), and a positive electrode (150), where surfaces of the graphene layers are provided substantially in parallel to a direction of an electric field (154) generated between the positive electrode and the negative electrode. USE - The secondary battery is used as a power source for a variety of electronic devices which can operate with electric power, where the electronic devices include display devices such as TVs and monitors, 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 discs, portable compact disc players, radio receivers, tape recorders, headphone stereos, stereos, remote controls, table clocks, wall clocks, cordless phone handsets, transceivers, cell phones, car phones, portable game machines, passometers, calculators, portable information terminals, electronic notebooks, e-book readers, electronic translators, audio input devices, cameras such as video cameras and digital still cameras, toys, electric shavers, electric toothbrushes, high-frequency heating devices such as microwave ovens, electric rice cookers, electric washing machines, electric vacuum cleaners, water heaters, electric fans, hair dryers, air-conditioning systems such as humidifiers, dehumidifiers, and air conditioners, dishwashers, dish dryers, clothes dryers, futon dryers, electric refrigerators, electric freezers, electric refrigerator-freezers, freezers for preserving DNA, flashlights, electric power tools, smoke sensors, and medical equipment such as hearing aids, cardiac pacemakers, and dialyzers, and industrial equipment such as guide lights, traffic lights, meters such as gas meters and water meters, belt conveyors, elevators, escalators, industrial robots, radio relay stations, cell phone base stations, power storage systems, and power storage devices, moving objects include electric vehicles, hybrid electric vehicles which include both an internal-combustion engine and a motor, plug-in hybrid electric vehicles, tracked vehicles in which caterpillars are substituted for wheels of these vehicles, motorized bicycles including motor-assisted bicycles, motorcycles, electric wheelchairs, golf carts, boats, ships, submarines, aircrafts such as fixed wing aircrafts and rotorcrafts, rockets, artificial satellites, space probes, planetary probes, and spacecrafts. ADVANTAGE - The secondary battery has high output and high capacity. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the insertion of lithium into a negative electrode. Negative electrode (100) Current collector (101) Graphene layers (103) Positive electrode (150) Electric field (154)