TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The cathode active substance is lithium cobalt oxide (LiCoO2), lithium-manganese-oxide (LiMn2O4), lithium-phosphate (LiM1PO4), lithium-manganese-oxide (LiMn2-xM2xO4) and lithium-nickel-cobalt-oxide (LiNi1-p-qCopO2), where M1 is iron, nickel, cobalt or manganese, M2 is nickel, chromium, cobalt, iron or copper, x is more than 0, but less than 2, p is more than 0, but less than 1, and q is more than 0, but less than 1.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The concentration of the structural unit (I) is 40-75 mol.%. The concentration of the structure unit (II) is 15-35 mol.%. The concentration of the structure unit (III) is 10-25 mol.%. The electric conductive agent comprises 0.1-1.5 pts. wt. carbon nano tube based on 100 pts. wt. cathode active substance. The composition further comprises 0.1-3 pts. wt. thickening agent based on 100 pts. wt. cathode active substance. Preferred Components: The structural unit (I) is vinyl fluoride, vinylidene fluoride, 1,2-difluoro-ethylene, trivinyl fluoride, tetrafluoroethylene, 1,2,3,3,3-pentafluoro propylene and hexafluoropropylene. The structural unit (II) is ethyl vinyl ether, cyclohexyl vinyl ether, phenyl vinyl ether and hydroxybutyl vinyl ether. The structure unit (III) is vinyl acetate and vinyl propionate. The aqueous solvent comprises water and optionally a glycol containing 2-6 carbon atoms. The thickening agent is selected from sodium carboxymethyl cellulose, sodium carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methylcellulose, hydroxypropyl cellulose and methyl cellulose.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The copolymer is in the emulsion form. The emulsifier composition further comprises fluorine-containing compound of formula (VII). Preferred Process: The copolymer is formed by using monomer emulsifying agent and initiator, monomer compounds of formulae (IV)-(VI) in the aqueous solvent under emulsion polymerization condition.n = 4-12.