TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: Lithium salt is lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), lithium hexafluoroarsenate (LiAsF6), lithium hexafluorostibate (LiSbF6), lithium perchlorate (LiClO4), lithium tetrachloroaluminate (LiAlCl4), lithium tetrachlorogallate (LiGaCl4), lithium nitrate (LiNO3), (tris(trifluoromethylsulfonyl)methyl)lithium (LiC(SO2CF3)3), monolithium mono((trifluoromethylsulfonyl)nitride) (LiN(SO2CF3)), lithium thiocyanate (LiSCN), lithium bis(trifluoromethylsulfonyl)amide (LiN(SO2CF3)2), lithium pentafluoroethanesulfonate (LiO3SCF2CF3), lithium pentafluorobenzensulfonate (LiC6F5SO3), lithium trifluoroacetate (LiO2CCF3), lithium fluorosulfate (LiSO3F), lithium phenyl derivative (LiB(C6H5)) or lithium trifluoromethanesulfonate (LiCF3SO3), preferably lithium LiPF6, or LiBF4. Ion solution is composed of salt of organic cationic group and inorganic anion. Inorganic anion is aluminum tetrachloride (AlCl4-), tetrafluoroborate (BF4-), tetrafluorophosphate (PF4-), trifluoroacetate (CF3COO-), trifluoromethanesulfonate (CF3SO3-), bis(trifluoromethylsulfonyl)amide (CF3SO2)2N-, hexafluorostibate (SbF6-), chloride (Cl-), bromide (Br-), iodide (I-), nitrate (NO3-), or perchlorate (ClO4-). Preferred Composition: Content of lithium salt is 2-30 wt.%.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: Maleimide is bismaleimide modified by barbituric acid. Organic cation is imidazole, pyridine, ammonium, or phosphine ion. The fire-resistant polymer electrolyte composition with maleimide further comprises organic solvent, vinylene carbonate additive, macromolecule of acrylic ester, and oxide additive chosen from silicon dioxide (SiO2), or titanium oxide (TiO2). Organic solvent is propylene carbonate, ethylene carbonate, gamma -butyrolactone, acrylic ester, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate, or their combination, preferably propylene carbonate, ethylene carbonate, or diethyl carbonate. Preferred Composition: Mole proportion of barbituric acid and bismaleimide is 1:1 to 1:20 (1:3 to 1:10). Composition of modified maleimide is 1-30 wt.%. Composition of organic solvent is 30-98 wt.%.