TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The solution adds polymer adsorbent in 0.1-1 pbw, and polyethylene glycol in 0.2-1 pbw, based on 100 pbw of total organic electrolytic solution used.Preferred Component: The polymer adsorbent is poly(ethylene)oxide, poly(ethylene glycol) monomethyl ether, poly(ethylene glycol) dimethyl ether, poly(ethylene glycol) monomethyl acrylate, and/or poly(ethylene glycol) dimethyl acrylate.Preferred Property: The weight-average molecular weight of the poly(ethylene glycol) dimethyl ether is 1000-2000.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The material capable of reacting with lithium to form lithium alloy is aluminum iodide, aluminum phosphate, aluminum sulfate, aluminum triflate, magnesium iodide, magnesium chloride, magnesium bromide, magnesium perchlorate, magnesium hexafluorophosphate, and/or magnesium triflate. The lithium salt is lithium phosphorus hexafluoride, lithium boron tetrafluoride, lithium chlorate, lithium di-(trifluoromethane sulfur dioxide), lithium antimony hexafluoride, and/or lithium arsenic hexafluoride.Preferred Composition: The material capable of reacting with lithium is present in 0.01-0,3 pbw, based on 100 pbw of solution.Preferred Concentration: The concentration of lithium salt is 0.4-1.5M.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Solvent: The organic solvent is ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, vinylene carbonate acetone, acetonitrile, M-methyl-2-pyrrolidone (NMP), diglyme(diethylene glycol dimethyl ether) (DGM), diethylene glycol diethyl ether, triglyme(triethylene glycol dimethylene ether) (TGM), triethylene glycol diethyl ether, 1,3-dioxolane, 4,5-dimethylidioxolane, 4,5-diethyldioxolane, 4-methyl-1,3-dioxolane, 4-ethyl-1,3-dioxolane, 2-fluorobenzene, 3-fluorobenzene, 4-fluorobenzene, dimethoxyethane, diethoxyethane, and/or sulfolane. EXAMPLE - Lithium phosphorus hexafluoride (LiPF6) was placed into a plastic box for storing an electrolytic solution at a concentration to form 1.15M lithium LiPF6 solution and mixed solvent of ethylene carbonate/dimethyl carbonate/ethylene methylcarbonate/propylene carbonate was added, and violently stirred to dissolve the LiPF6. To the resultant product were added polyethylene glycol dimethyl ether (0.2 pbw) having weight-average molecular weight of 2000 and aluminum iodide (0.05 pbw) to prepare organic electrolytic solution.