TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The salt electrolyte is chosen alkali metal salts, quaternary ammonium salts (e.g. tetramethylammonium tetrafluoroborate), quaternary phosphonium salts (e.g. tetramethylphosphonium tetrafluoroborate), transition metal salts (e.g. silverperchlorate) or acids (e.g. hydrochloric, perchloric acid, fluoboric acid, phosphoric acid or sulfuric acid). The salt electrolyte is lithium trifluoromethanesulfonic acid, lithium bis(oxalato)borate, lithium trifluoro methane sulfonimide, lithium trifluoro-methanesulfonic acid methide, lithium methyl trifluoro methanesulfonic acid methide, fluoro substituted lithium compound of formula LiCCH3(CF3SO2)2, LiCH(CF3SO2)2, LiCH2(CF3SO2), lithium pentafluoroethanesulfonic acid, lithium pentafluoroethanesulfonic acid imide, lithium trifluoroethanesulfonic acid borate, lithium phosphofluoride, lithium antimony-fluoride, lithium perchlorate, lithium thiocyanate, lithium arsenofluoride, sodium triflate, sodium hexafluorophosphate, sodium perchlorate, sodium iodide, sodium fluoroborate, sodium hexafluoroarsenate, potassium triflate, potassium hexafluorophosphate, potassium iodide, lithium trifluoromethane carbonate, sodium chlorate, sodium thiocyanate, potassium fluoroborate, magnesium perchlorate and/or magnesium fluoroborate. The mineral filler is an oxide compound e.g. silica, titania and/or alumina. The molar ratio of the block-B1 to the salt electrolyte (e.g. lithium) is 0.01-200, preferably 15-30.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The anode is lithium metal or carbon. The cathode is lithium.R1 = 1-10C alkyl;m = 5-1000;n = 2-5000;p = 2-50; andR = H or CH3.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The SPE further comprises a mineral filler at 1-20 wt.%. The SPE is present in the form of a sheet, membrane or film. The SPE is subjected to a heat-treatment at 40-100degreesC for 2-300 hours. Preferred Components: The block-A and B1 are cstatistical copolymers. The block-A is polystyrene, poly(1-10 carbon alkyl)methacrylate, poly(meth)acrylic acid, poly(styrene/(meth)acrylic acid) statistical copolymer or poly(1-10 carbon alkyl)methacrylate/(meth)acrylic acid statistical copolymer. The block-B1 is polyethyleneoxide, polypropyleneoxide, polyethyleneoxide-polypropyleneoxide statistical copolymer or polyethylene glycol-poly(meth)acrylate statistical copolymer. The triblock is of formula -(CH2-C(CH3)(C(=O)(OR1)))m-O-(CH2-CH2-O)n-(CH2-C(CH3)(C(=O)(OR1)))m-, -(CH2-C(R)(C(=O)(OH)))m-(CH2-C(R)(C(=O)(O-(CH2-CH2-O)p)))m-(CH2-C(R)(C(=O)(OH)))m-, or a polystyrene-polyethylene-polystyrene triblock of formula (a) or (b). The tri-block copolymer is poly(1-10 carbon alkyl)methacrylate-polyethyleneoxide-poly(1-10 carbon alkyl)methacrylate; polyacrylic acid-poly(1-10 carbon alkyl)methacrylate-polyacrylic acid; polystyrene-polyethyleneoxide-polystyrene (preferred); polystyrene-polyethylene glycol-poly(meth)acrylate statistical copolymer-polystyrene; poly(meth)acrylic acid-polyethylene glycol-poly(meth)acrylate statistical copolymer-poly(meth)acrylic acid; or poly(1-10 carbon alkyl)methacrylate-polyethylene glycol-poly(meth)acrylate statistical copolymer-poly(1-10 carbon alkyl)methacrylate. The block-A is present at less than or equal to35, preferably 15-30 wt.%. The block-A has a number average molecular weight of 500-30000, preferably 1000-10000 g/mol. The block-B1 has a number average molecular weight of 2000-200000, preferably 5000-20000 g/mol. The tri-block copolymer has a number average molecular weight of 2500-260000, preferably 10000-50000 g/mol. The block-A is subjected to a photo-or thermo crosslinking after nanostructuring and preparing the SPE. The tri-block copolymer further comprises homo-/copolymer e.g. polyethyleneoxide, polystyrene, m-tert-butoxystyrene-polyethyleneoxide. EXAMPLE - In a 100 ml ball tricol, macroalkoxyamine (6.3 g), styrene (15 g) and toluene (10 g) were reacted under ambient temperature for 20 minutes. Nitrogen was degassed from the obtained reaction mixture and reacted at 110degreesC for 5 hours to give polystyrene-polyethyleneoxide-polystyrene.