TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The nanoparticles comprise silicon oxide (SiO2), aluminum oxide (Al2O3), tin oxide (SnO2), titanium oxide (TiO2), lithium-aluminum oxide (LiAlO2), cerium oxide (CeO2), iron oxide (Fe3O4), rare earth, clay or zeolite. The material of positive electrode comprises lithium-cobalt oxide (LiCoO2), lithium-manganese oxide (LiMn2O4), lithium iron phosphate (LiFePO4), lithium-nickel-cobalt-manganese oxide (LiNi1/3Co1/3Mn1/3O2). The material of negative material comprises artificial graphite, or carbon micro-sphere of coke phase.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The mass ratio of polyethylene oxide and polyvinylidene fluoride-hexafluoropropylene in the mixture is 1:1-1:1.5. The dosage of nanoparticles is 5-20% of the mixture. The solvent comprises acetone, N,N-dimethyl formamide and/or tetrahydrofuran. The electrolyte solution consists of lithium hexafluorophosphate (LiPF6), ethylene carbonate (EC), dimethyl carbonate (DMC) and ethyl methyl carbonate (EMC). The concentration ratio of EC:DMC:EMC is 1:1:1, and the mol concentration of lithium hexafluorophosphate is 1 mol/l.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The inactive supporter has three-layered composite isolation film comprising polyethylene, polypropylene, polypropylene-ethylene-propylene or non-woven fabrics. The supported-nanoparticles-doped gel state polymer electrolyte is assembled with positive electrode and negative electrodes to form a button-type battery under environmental condition in which water content is less than 60 ppm and oxygen content is less than 2000 ppm. The polymer film in supported-nanoparticles-doped gel state polymer electrolyte, and material of positive and negative electrodes are assembled as a battery core by winding process, the positive electrode is led out from an aluminium lug by spot soldering, the negative electrode is led out from a nickel lug by spot soldering, the battery core is dried at 50-65 degrees C for 15-20 hours, and the dried battery core is placed in an aluminium plastic film bag. The electrolyte solution is injected into the aluminium plastic film bag, the top portion is sealed, the bag is sealed, kept in still position for 15-20 hours, and the bag is again sealed after generation of gas in the air bag, to obtain polymer lithium ion battery.