TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The negative electrode active material is obtained using sulfur-based amorphous solid electrolyte including lithium-ion electrolyte, sulfur-containing glass, lithium nitride, amorphous sulfur-containing compound of formula: Li2S-P2O5, a NASICON structured-type compound comprising lithium-aluminum-titanium-silicon-oxygen-containing compound, Li1+x+yAlxTi2-xSiyP3-yO12, germanium-phosphorus-compound of formula: Li10GeP2S12, and garnet structured-compound comprising lithium-lanthanum-zirconium-oxygen-containing compound of formula: Li7La3Zr2O12, where x is 0.3, and y is 0.2. The negative electrode active material comprises silicon-carbon composite comprising silicon particles, and carbon. The amorphous surface layer comprises amorphous carbon. The negative electrode active material is obtained using graphite, graphene, carbon nanotube, carbon fiber, and amorphous carbon. Preferred Properties: The silicon-carbon composite has average particle diameter of 5-20 mu m. The silicon particles have average particle diameter of 5-200 nm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The conductive composition is obtained using aprotic solvent chosen from hydrocarbon-based solvent, aromatic compound-based solvent, ketone-based solvent, ether-based solvent, ester-based solvent, amide-based solvent and nitrile-based solvent, protic solvent chosen from water and alcohol, additive chosen from polyvinylpyrrolidone, sodium salt of carboxymethyl cellulose and sodium chlorate, and 0.05-1 g/l carbon chosen from fibrous carbon having average diameter of 10-200 nm, graphene structure carbon particles having average particle diameter of 10-200 nm, and carbon black having average particle diameter of 10-80 nm.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The negative electrode active material obtained using additive chosen from polyvinylpyrrolidone, sodium salt of carboxymethyl cellulose and polyvinyl alcohol, and coal-tar pitch including polycyclic aromatic compound.