TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Composition: The negative electrode contains carbon material (a) which occludes and discharge lithium ion, metal (b) which forms alloy with lithium, and/or metal oxide (c) which occludes and discharge lithium ion. The negative electrode active material is connected with negative electrode collector (d) by the binder for negative electrodes. The electrode element has a planar laminated structure.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: All or one portion of the metal oxide (c) has amorphous structure. Portion or all of metal (b) is dispersed in metal oxide (c). The electrolyte is gel electrolyte. The exterior component is aluminum laminate film. The lithium-supporting electrolyte is chosen from lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoro arsenide, lithium hexafluroantimonate, lithium perchlorate, lithium aluminum chloride, lithium trifluoromethanesulfonate, lithium nonafluorobutanesulfonate, lithium bis(trifluoromethanesulfonate), and lithium nitrate compound of formula: LiN(CpF2p+1SO2)(CqF2q+1SO2).p,q=1-5.    TECHNOLOGY FOCUS - METALLURGY - Preferred Composition: The metal (b) is silicon.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The electrolyte solution contains aprotic solvent chosen from low-dielectric solvent having dielectric constant of less than 20 and high-dielectric-constant solvent having dielectric constant of 20 or more. The aprotic solvent further contains cyclic carbonate, linear carbonate, aliphatic carboxylic acid ester, gamma -lactone, fluoro derivative, cyclic ether, and chain-shaped ether. The fluorinated ether is of formula: H-(CX1X2-CX3X4)n-CH2O-CX5X6-CX7X8-H (I) and/or H-(CF2-CF2)m-CH2O-CF2-CF2-H (II). The electrolyte solution further contains cyclic disulfonate compound of formula (III), chain-shaped disulfonate compound of formula: R3-S((=O)2)-C(-R4)(-R1)-S((=O)2)-R2 (IV), sultone compound of formula (V) and/or vinylene carbonate or its derivative(s).n=1-4;X1-X8=H or fluoro, where at least one of X1-X4 is fluoro and at least one of X5-X8 is fluoro;m=1 or 2;Q=oxygen, methylene, or single bond;A1=carbonyl or sulfinyl, or 1-5C branched alkylene, 1-5C branched perfluoro alkylene, 2-6C branched fluoro alkylene, 1-6C branched alkylene including ether bond, 1-6C branched perfluoro alkylene including ether bond or 2-6C branched fluoro alkylene including ether bond (all optionally substituted);A2=optionally substituted branched alkylene;R1,R4=H, 1-5C perfluoroalkyl, -SO2X9, -SY1, -COZ or halo, or 1-5C alkyl, 1-5C alkoxy or 1-5C fluoroalkyl (all optionally substituted);X9,Y1=optionally substituted 1-5C alkyl;R2,R3=1-5C perfluoroalkyl, 1-5C perfluoroalkoxy, hydroxy, halo, -NX10X11 or -NY2CONY3Y4, or 1-5C alkyl, 1-5 alkoxy, phenoxy, 1-5C fluoroalkyl or 1-5C fluoro alkoxy (all optionally substituted);X10,X11,Y2-Y4,Z=H or optionally substituted 1-5C alkyl;R5-R10=H, 1-12C alkyl, 3-6C cycloalkyl, or 6-12C aryl;andr=0, 1, or 2.The atomic ratio of fluoro and H bonded with the compound (I) is 1 or more.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The binder is polyimide or polyamidoimide.