TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The device further comprises at least one lithium metal oxide cathode, at least one porous separator, and an anode comprising carbon and/or lithium metal.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The alkali metal salt is lithium perchlorate, lithium tetrafluoroborate, lithium hexafluoroarsenate, lithium hexafluorophosphate, lithium trifluoromethanesulfonate, lithium bis(trifluoromethylsulfonyl)imide, lithium tris(trifluoromethanesulfonate)methide, lithium bis(pentafluoroethane-sulfonyl)imide, lithium alkyl fluorophosphates, lithium bis(chelato)borates, lithium tris(pentafluoroethyl)trifluorophosphate or lithium tris(trifluoromethyl)trifluorophosphate, preferably lithium bis(chelato)borate having 5-10 (preferably 5-7) membered rings.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The cyclic polysiloxane is crosslinked. The cyclic polysiloxane is entrapped within at least one crosslinked network polymer. The network polymer includes a poly(methacrylate); a cross-linked polysiloxane; and a polysiloxane, where at least a portion of the main chain silicons are linked to side chains that each include a poly(alkylene oxide) moiety. The network polymer is formed from a poly(alkylene glycol) dialkyl alkyl acrylate monomer of formula (R3=C(R2a)-C(=O)-(O-CH2-CH(X))n-O-C(=O)-C(R2b)=R3). The main chain silicons are bonded to a crosslinker having a moiety comprising (O-(CH2CH2O)q) or (Si-O-(Si-O)k-Si), where n of the main chain silicons are bonded to a crosslinker, m of the main chain silicons are bonded to a side chain, and a ratio of n:m is 1:4-1:200, preferably 1:6-1:100. The electrolyte is a liquid or solid. The electrolyte includes: at least one alkali metal salt; and a blend of polysiloxanes. The electrolyte further includes: at least one solid polymer; and a polysiloxane having a structure of formula (b). The solid polymer is polyacrylonitrile, poly(methyl methacrylate), poly(vinylidene fluoride), poly(vinylidene fluoride-co-hexafluoropropylene), poly(vinyl acetate), polystyrene or poly(ethylene oxide). The average molecular weight of the cyclic polysiloxane is less than or equal to 20000 g/mole. The dynamic viscosity of the cyclic polysiloxane is less than or equal to 10000 cps. The (ethylene oxide)/(lithium) ratio is 5-50, where (ethylene oxide) is a molar concentration in the electrolyte of active oxygen in the polysiloxane, and (lithium) is a molar concentration of the lithium in the electrolyte.R3 = 1-10C alkyl;R2a, R2b = H, 1-10C alkyl or 2-12C alkenyl;X = H or CH3;n = 1-15;q = 4-30; andk = 5-30.In formula (b),R = alkyl;R1c = alkyl or H;p = greater than 0;n = 1-100;x = 1-30; andQ = crosslinker linking the polysiloxane to another polysiloxane. Preferred Definitions:    R1 = H; and    R2 = spacer group having 6 or fewer CH2 group.