TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Component: The monomer contains salt of quaternary-ammonium cation (A) and fluorine-containing anion chosen from bis((trifluoromethyl) sulfonyl) amide anion or tetra-fluoroborate anion. The quaternary-ammonium cation (A) is chosen from 1-ethyl-3-vinyl imidazolium, N-(2-(meth)acryloyl oxyethyl)-N, N,N-trimethyl ammonium, N-(3-(meth)acryloyl oxypropyl)-N, N,N-trimethyl ammonium, N-(4-vinyl benzyl)-N,N,N-trimethyl ammonium, and N,N-diallyl-N,N-dimethyl ammonium. The fused salt contains salt of quaternary-ammonium cation (B) and bis ((trifluoromethyl) sulfone) amide anion and/or tetra-fluoroborate anion. The cation (B) is chosen from N-methyl-N-propyl piperidinium, N-(2-methoxyethyl)-N,N,N-triethyl ammonium or N,N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium. The lithium salt is tetrafluoro lithium borate (LiBF4) and/or lithium complex (Li(CF3SO2)2N).Preferred Material: The anode active material is chosen from vanadium pentaoxide, vanadium complex oxide (V6O13+y, where y is 0-0.16), lithium-cobalt complex (LiCoO2), lithium-nickel complex (LiNiO2), and lithium-manganese complex (LiMnO2, LixMn2O4, where x is between 0.1 and 0.5). The cathode active material contains substance capable of electrochemically occluding and discharging metal lithium and lithium.    TECHNOLOGY FOCUS - POLYMERS - Preferred Phase: The continuous phase is formed at both anode side and cathode side.Preferred Compound: The fused-salt polymer electrolyte is polymer of mixture containing quaternary ammonium salt having polymerizable functional group, quaternary ammonium salt which does not have polymerizable functional group, and lithium salt. The electrolyte contains electrochemically inactive polymeric reinforcement material.Preferred Method: The electrolyte is obtained by polymerizing polymerization liquid containing polymerizable fused-salt monomer (in wt.%) (10-20), non-polymerizable fused salt (30-40), polyvinylidene fluoride (20-30), and lithium salt (20-30). The dispersion liquid of electroconductive material is applied to collector, and thermal polymerization is carried out with drying. The active material and electroconductive material adhered to collector using binder polymer is impregnated with precursor polymerization liquid.Preferred Compound: Polyvinylidene fluoride contains double bond between carbon-carbon.