TECHNOLOGY FOCUS - ELECTRONICS - Preferred Process: The solid electrolyte-cathode conjugant is joined with the composite anode such that the solid electrolyte surfaces touch. Alternately, the lithium ion electroconductive composition is applied on composite anode and solid electrolyte-anode conjugant is formed, and the formed conjugant is joined with cathode. Alternately, solid electrolyte-anode conjugant and solid electrolyte-cathode conjugant are formed and joined such that the solid electrolyte surfaces touch. The manufacture of anode and cathode are performed continuously and joining of the two poles is performed succeedingly. Preferred Property: The hardened film has thickness of 5-100 microns.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Compounds: The hardenable oligomer is urethane (meth)acrylate type compound having (meth)acryloyl group in the entire terminal and/or portion of the terminal, or polyisocyanate type derivative having hydrocarbon group. Preferred Composition: The electroconductive composition further contains electrolyte liquid. EXAMPLE - VESTANAT IPDI (isophorone diisocyanate) (in parts) (160) and CM-211 (ethylene oxide/propylene oxide block polyether polyol having weight average molecular weight of 2100) (755) were charged in a reactor. 2-hydroxy ethyl acrylate (85), hydroquinone monomethyl ether (0.4) and dibutyl tin dilaurate (0.1) were added to reactor and the contents were reacted to obtain urethane acrylate having number average molecular weight of 4300. Lithium trifluoro methyl sulfonyl amine (5) and lithium tetrafluoro borate (10) were dissolved in methoxy polyethylene glycol monoacrylate (37). Aerosil 200 (silicon oxide) (10), 1-hydroxy-cyclohexyl phenyl ketone (3) and urethane acrylate (80) were mixed to obtain lithium ion electroconductive composition. The composition was applied on cathode consisting of lithium foil and solid electrolyte-cathode conjugant was produced. Anode containing aluminum foil and the solid electrolyte-cathode conjugant were bonded by thermo compression bonding and sealed to obtain lithium polymer battery. The produced battery had capacitance maintenance percentage of 86%, excellent charging-and-discharging characteristic and storage elastic modulus of 3.2x106 Pa at 30degreesC and 1x106 Pa at 150degreesC.