TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The carboxylic acid is alkylmonocarboxylate (preferably formic acid, acetic acid, octanic, acid, or stearic acid); alkyldicarboxylate (preferably oxalic acid, malonic acid, or adipic acid); aromatic carboxylic acid (preferably benzoic acid or terephthalic acid); or alkylcarboxylate fluoride (preferably perfluoro n-caprylate). The alkali metal carboxylate is lithium alkylmonocarboxylate (preferably lithium formate, lithium acetate, lithium octanoate, or lithium stearate); lithium alkyldicarboxylate (preferably lithium oxalate, lithium malonate, or lithium adipate); lithium aromatic carboxylate (preferably lithium benzoate or lithium terephthalate); or lithium alkylcarboxylate fluoride (preferably lithium perfluoro n-caprylate). The alkaline-earth metal carboxylate is magnesium alkylmonocarboxylate (preferably magnesium formate, magnesium acetate, magnesium octanoate, or magnesium stearate); magnesium alkyldicarboxylate (preferably magnesium oxalate, magnesium malonate, or magnesium adipate); magnesium aromatic carboxylate (preferably magnesium benzoate or magnesium terephthalate); or magnesium alkylcarboxylate fluoride (preferably magnesium perfluoro n-caprylate).    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The negative electrode contains copper or a material (e.g., carbonaceous material) capable of occluding and releasing lithium. The positive electrode contains lithium composite oxide. EXAMPLE - A positive electrode and a negative electrode were stuck together and a separator was interposed between them. Then, monomers consisting of methoxydiethyleneglycolmethacrylate (A) and polyethyleneglycolmethacrylate (B), and plasticizers consisting of propylene carbonate (C), ethylene carbonate (D), and diethyl carbonate (E) were mixed in 5:5:20:20:50 (A:B:C:D:E) mass fraction. A mixed solvent was prepared by dissolving magnesium stearate, lithium phosphate hexafluoride, and bis(4-t-butyl cyclohexyl) peroxy dicarbonate (BCHPC). The separator was impregnated with the mixed solvent. The electrodes and separator were then assembled into battery. The monomers were then radical-polymerized by at 75 degreesC for 45 minutes to obtain an electrolyte. The battery formed was then evaluated. Results showed that it had an initial discharging capacity of 498 mAh, a charging/discharging efficiency of 95%, and a capacity retention rate of 82 %.