▎ 摘　　要

NOVELTY - The method comprises mixing graphene oxide, particulate negative electrode active materials and a precursor of polyimide to form slurry, applying (S105) the slurry over a negative electrode current collector, drying (S106) the slurry, and heating the slurry at a temperature of greater than or equal to 200 degrees C and less than or equal to 400 degrees C so that the precursor of the polyimide is imidized. The graphene oxide is reduced in the step of heating the slurry. The particulate negative electrode active materials are silicon particles. USE - The method is useful for forming a negative electrode that is useful in a lithium secondary battery (all claimed), which is useful in portable devices such as smart phones and portable game consoles, hybrid cars, electric cars, display devices of televisions and monitors, lighting devices, desktop personal computers, laptop personal computers, word processors, image reproduction devices that produce still and moving images stored in recording media such as digital versatile discs, 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, 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, medical equipment such as dialyzers, guide lights, traffic lights, belt conveyors, elevators, escalators, industrial robots, power storage systems, plug-in hybrid electric vehicles, tracked vehicles, motorized bicycles including motor-assisted bicycles, motorcycles, electric wheelchairs, golf carts, boats, ships, submarines, helicopters, aircrafts, rockets, artificial satellites, space probes, planetary probes, and spacecrafts. ADVANTAGE - The method enables rapid formation of the negative electrode with high strength thus increasing the capacity, the charge-discharge characteristics, the reliability and the safety of the lithium secondary battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for manufacturing a lithium secondary battery. DESCRIPTION OF DRAWING(S) - The diagram shows a flow chart of a method for forming a negative electrode. Removing a solvent from a dispersion containing a graphene oxide (S101) Mixing particulate negative electrode active materials, the graphene oxide and a binder (S102) Mixing the particulate negative electrode active materials, the graphene oxide, the binder and the solvent are mixed to form slurry (S103) Applying the slurry over a negative electrode current collector (S105) Drying the slurry. (S106)