TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The high molecular compound contains inorganic fine particle comprising aluminum oxide, silicon dioxide, magnesium oxide, titanium dioxide and zirconium dioxide, where the oxidation-reduction potential (based on lithium metal) of the oxidation reduction compound in the electrolyte solution is higher than the electric potential potential (based on lithium metal) of the positive electrode of the charge final voltage in the electrolyte solution, and it is lower than the oxidation potential (based on lithium metal) of the inorganic fine particle in the electrolyte solution. The positive electrode contains metal salt comprising an alkali metal such as Magnesium, aluminum, carbon, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc as a constituent element, and the metal salt contains carbonate, carboxylate, a phosphate, nitrate, a sulfate, and fluorides. The electrolyte solution comprises a halogen as a constituent element and cyclic carbonate, 4-fluoro-1,3-dioxolan-2-one and 4,5-difluoro-1,3-dioxolan-2-one. Preferred Composition: The chlorine content in the electrolyte solution is 10 ppm or less. The secondary battery has open-circuit voltage is 4.25-6.00V.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The oxidation reduction compound is Li2B12FxZ12-x, phenyl compound of formula (I), 2-phenyl-benzo(1,3,2)dioxaborole compound of formula (II), 1-hydroxy-imidazolidin-4-one compound of formula (III), 2,5-dihydro-imidazol-1-ol compound of formula (IV) and pyridin-1-ol compound of formula (V). The high molecular compound contains an organic polymer compound and the inorganic polymer compounds comprising polyvinylidene fluoride, polytetrafluoroethylene, poly hexafluoropropylene, polychlorotrifluoroethylene, polyethylene, polypropylene, polystyrene, polyacrylonitrile, polyacrylic acid, polymethacrylic acid, polymethyl methacrylate, polymethacrylicacid ethyl, sodium polyacrylate, polyacrylic acid lithium salt, polymethacrylic-acid lithium salt, polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyether imide, polyphenylene ether, polyether ketone, polyetheretherketone, polyamide, aramid, polyamic acid, polyamide imide, polyurethane, urea resin, melamine resin, phenol resin, epoxy resin, unsaturated polyester resin, styrene butadiene rubber, carboxymethylcellulose, sodium carboxymethylcellulose, carboxymethylcellulose lithium salt, polybenzimidazole, polysiloxane, alginic acid, sodium alginate, and alginic acid lithium salt. The separator has the multilayered structure on which the high molecular compounds were laminated or the single layer structure from which a composition of the high molecular compound differs in thickness direction.Z=H, Cl, or Br;x=4-12;R1-R4=halo such as F, Cl, Br or I, alkyl, or H (optionally substituted);a,b=more than 0;R1+R1, R1+R2, R3+R4, R5-R9, R10-R14, R15-R21=ring;c=0-4;d=0-5;R5-R8, R10-R13, R15-R18 =alkyl, alkenyl, or H (optionally substituted with the halo of F, Cl, Br, or I);R9, R14=H, C, O, N or P;Y1= -S- or -SO2-;R19-R21=H, C, O, N, or P;C+R19-R21= single bond or double bond;Z=N, P, O, or S;f, g=integers determined according to bonding between C of R19 and R20;andh=an integer determined according to Z, where 0 greater than a+b equals to 6.