TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The cathode material further contains modified fluorine-containing polymer compound (A) obtained by modifying fluorine-containing resin (B) which is branched polymer, by modification substance (C). The amount of resin binder is 1-30 wt.% with respect to whole cathode material. The branched polymer contains fluorine-containing resin chosen from polyvinylidene fluoride, poly vinyl fluoride, 4-ethylene-fluoride polymer, 3-ethyelne fluoride polymer, 2-ethyelene-flurodie polymer, vinylidene-fluoride-hexafluoropropylene copolymer, ethlylene-4-ethyelne-fluoride copolymer, 4-ethyelne-fluoride-hexafluoro-propyelne copolymer, 3-fluorinated ethylene chloride polymer, and/or polytetrafluoroethylene. The ratio of vinylidene fluoride in compound and vinylidene fluoride in compound, is 95-60 wt.%. Preferred Component: The modified substance is acrylic acid, methyl acrylate, methacrylic acid and/or methyl-methacrylate. Preferred Process: The compounds (A,B,C) are grafted by radiation-exposure process. The radiation-exposure processing of compound is performed by gamma-ray irradiation, and absorption dose of gamma-ray of compound is 10-90 kGy.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Particle: The inorganic substance particle comprises silicon, germanium, magnesium, tin, lead, silver, aluminum, zinc, cadmium, antimony, bismuth, indium, calcium, iron, nickel, cobalt and/or manganese, and lithium, or their alloys, oxides and compounds, preferably silicon particle, silicide compound, silicon oxide or silicon oxy carbide. Preferred Properties: The mean particle diameter of particle (11), is 0.1-50 mum. The lamination interval (d002) of graphite network flat surface, is 0.3354-0.339 nm, as measured by X-ray diffraction. At least 85% of exposed portion of mixture containing carbon nano fiber and/or particle-form aggregate, forms the edge portion of graphite network. Preferred Composition: The weight ratio of particle (11) and carbon material (12), is 95/5-30/70. The carbon particle has 80-99.5 wt.% of carbon nano fiber and 0.5-20 wt.% of particle form aggregate. The cathode material having axis is arranged parallel to fiber axis, and carbon nano fiber is formed concentric-circularly into several cylindrical graphite networks.    TECHNOLOGY FOCUS - TEXTILES AND PAPER - Preferred Fiber: The carbon nano fiber has lamination of planar-shaped graphite network. The graphite network has perpendicular structure with respect to fiber axis. EXAMPLE - Carbon material (in wt.%) (10) was dispersed in N-methyl pyrrolidone, and dispersion solution was obtained. Acrylic acid grafted polyvinylidene fluoride (as resin binder) (15) was dissolved in solvent, and resin binder solution was obtained. The dispersion solution, resin binder, and silicon particle (75) having mean particle diameter of 0.5-1 mum, were mixed, to obtain cathode material. A solvent was removed from the cathode material and dried, to obtain cathode. The cathode had high electroconductivity, and provided battery with charging and discharging capacitance of 92% and improved energy density.