TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The polymer is a soluble, swellable, or insoluble polymer, or a polymer having mixed properties depending on the kind of liquid electrolyte to be used. The electrolyte swellable polymer is polyethylene oxide, polyvinylidene fluoride-hexafluoropropylene, polyvinylidene fluoride-trichloroethylene, polymethyl methacrylate, polyacrylonitrile, polyacrylonitrilestyrene copolymer, polyvinyl chloride (PVC), polyvinyl pyrrolidone, polyvinyl acetate, polyethylene-vinyl acetate copolymer, or gelatin. The electrolyte-soluble polymer is cyanoethyl pullulan, cyanoethyl polyvinyl alcohol, cyanoethyl cellulose, cyanoethyl sucrose, pullulan, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, polyethylene glycol, glyme, polyethylene glycol dimethylether, or poly pyrrolidone.The liquid electrolyte includes a salt represented by the formula A+B-, where A+ = alkali metal cation or its combination and B- = anion or its combination. The salt is dissolved or dissociated in organic solvent from propylene carbonate, ethylene carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, dimethyl sulfoxide, acetonitrile, dimethoxyethane, diethoxyethane, tetrahydrofuran, N-methyl-2-pyrrolidone, ethylmethyl carbonate, or gamma-butyrolactone. The polymer coated on the surface of electrode active material as an independent phase is swelled and/or dissolved by incorporation of liquid electrolyte upon injection of the liquid electrolyte to form part of electrolyte. The electrolyte formed by polymer coated on the surface of material as an independent phase infiltrates uniformly into surface of electrodes of the electrochemical device, pores present in the electrode active material or in the electrodes, surface of a separator, and pores of a separator.Preferred Property: The polymer has a dielectric constant of 1.0-100 measured at a frequency of 1 kHz. The electrolyte-soluble or electrolyte-swellable polymer has a solubility parameter of 18-30 (J1/2/cm3/2) depending on the kind of liquid electrolyte to be used. The polymer coating layer has a thickness of 1 nm - 1 microns. The electrode has a porosity of 1-50%.Preferred Process: The dipping of electrode is carried out by dip coating, die coating, roll coating, and/or comma coating.