▎ 摘　　要

NOVELTY - The positive electrode comprises a current collector, and an active material layer (102) provided over the current collector. The active material layer comprises an active material (103), a graphene (104), and a binder. A carbon layer (105) is present in contact with a surface of the active material, and has an amorphous structure. A proportion of the graphene in the active material layer is greater than or equal to 0.1 wt.% and less than or equal to 1 wt.%. A maximum value of discharge capacity (mAh/g) of the positive electrode is greater than or equal to 140 mAh/g at a discharging rate of 1 C. USE - The positive electrode is useful for a secondary battery, which is useful in an electronic device (all claimed), hybrid and electric vehicles, industrial equipments, plug-in hybrid electric vehicles, tracked 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 as a power source, where: the electronic device includes cell phones, smartphones, electronic book readers, portable game machines, display devices such as TV and monitors, lighting devices, desktop personal computers, 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, electronic-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 the industrial equipments include 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 for leveling the amount of power supply and smart grid. ADVANTAGE - The positive electrode improves energy density and charge-discharge characteristics of the battery, and has improved conductivity and high strength. DETAILED DESCRIPTION - The positive electrode comprises a current collector, and an active material layer (102) provided over the current collector. The active material layer comprises an active material (103), a graphene (104), and a binder. A carbon layer (105) is present in contact with a surface of the active material, and has an amorphous structure. A proportion of the graphene in the active material layer is greater than or equal to 0.1 wt.% and less than or equal to 1 wt.%. A maximum value of discharge capacity (mAh/g) of the positive electrode is greater than or equal to 140 mAh/g at a discharging rate of 1 C. A thickness of the carbon layer is greater than or equal to 1 nm and less than or equal to 50 nm. A discharge curve of the positive electrode at a lower limit voltage or more has a plateau in greater than or equal to 60% of a measuring range, where the lower limit voltage is 2V. An INDEPENDENT CLAIM is included for a method for manufacturing a positive electrode for a secondary battery. DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a positive electrode for a secondary battery. Active material layer (102) Active material (103) Graphene (104) Carbon layer. (105)