TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Electrolyte Cell: The positive and negative electrodes are layered or coiled or stacked together with interposition of electrolyte. A separator is arranged between positive and negative electrodes. Preferred Positive Electrode: The positive electrode comprises 0.001-0.0005 mol of diene compound/1 g of active material. Preferred Solid Electrolyte: The solid electrolyte is made of at least two layers, which are a first solid electrolyte layer (13a) formed on the side positive electrode and a second solid electrolyte layer (13b) formed on the side negative electrode. The first solid electrolyte layer contains 75% of diene compound. The solid electrolyte in a gelated state contains 1,4-cyclohexadiene as diene compound, and a non-aqueous solvent. Preferred Electrolyte Salt: The electrolyte salt(s) is LiPF6, LiClO4, LiCF3SO3, LiAsF6, LiBF4, LiN(CF3SO2)2, C4F9SO3Li, LiC(CF3SO2)3, LiF and/or LiBr.    TECHNOLOGY FOCUS - POLYMERS - Preferred Matrix Polymer: The matrix polymer(s) is polyethylene oxide, polypropylene oxide, polytetrafluoroethylene, polyvinylidene fluoride, polyvinylidene chloride, polymethacrylic acid, polyacrylic amide, polycarbonate, polysulfone and/or polyethersulfone.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Solvent: The non-aqueous solvent(s) is ethylene carbonate, propylene carbonate, alpha-butyrolactone, acetonitrile, diethylether, diethylene carbonate, dimethyl carbonate, 1,2-dimethoxyethane, dimethyl sulfoxide, 1,3-dioxolan, methyl sulfonate, 2-methyltetrahydrofuran, tetrahydrofuran, sulforan, 2,4-difluoroanisole and/or vinylene carbonate. EXAMPLE - (In weight parts) Pulverized graphite (90) and poly(vinylidene fluoride-co-hexafluoropropylene) (10) were mixed, and obtained mixture was dispersed and mixed in N-methyl-2-pyrolidone. The obtained mixture was coated on a copper foil of thickness 10 mum, dried and compression-molded to form negative electrode. Lithium carbonate and cobalt carbonate were mixed in a mole ratio of 0.5:1, fired at 900degreesC in air for 5 hours to form active material (LiCoO2). LiCoO2 (91), graphite (electrifying agent) (6), poly(vinylidene fluoride-co-hexafluoropropylene) (10) were mixed, and the obtained mixture was dispersed in N-methyl-2-pyrolidone to form a slurry. The slurry obtained was coated on strip-shaped aluminum foil of thickness 20 mum, dried and compression-molded to form positive electrode. The density of the active material/unit area of the positive electrode was 40 mg/cm2. Plasticizer (30), ethylene carbonate (31), propylene carbonate (41), alpha-butyrolactone (10), LiPF6 (15), 1,4-cyclohexadiene (3), poly(vinylidene fluoride-co-hexafluoropropylene) (10), and diethyl carbonate (60) were mixed to form a gel electrolyte solution. The obtained solution was coated on positive and negative electrodes, left at room temperature for 8 hours. The coated electrodes were pressed together through electrolyte solution coated side to form an element cell (2) which was a flat plate of thickness 0.4 cm. The obtained element cell was packed in vacuum with laminated film of three-layered structure of propylene, aluminum and nylon. A solid electrolyte cell was produced. The amount of 1,4-cyclohexadiene in electrolyte/1 g of positive electrode active material in the cell was 36 mg. The cell had initial capacity of 450 mAh. The cell had volume up-keep ratio of 94% after 300 cycles and 85% after 500 cycles. Gas was not formed during charging/discharging cycles of the cell.