TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Components: The separator comprises at least one cathode and at least one anode. The anode is comprised of carbon anodes, tin or silicon anodes or anodes comprising lithium titanate compound of formula (Li4+xTi5O12).x = 0-3.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The metal or semimetal is boron, aluminum, silicon (preferred), titanium, zirconium, hafnium, germanium, tin, lead, vanadium, arsenic, antimony and/or bismuth. The amount of metal or semimetal is at least 90 mol.%. (D) is lithium hexafluorophosphate, lithium perchlorate, lithium hexafluoroarsenate, lithium trifluoromethanesulfonate, lithium(bis(trifluoromethylsulfonyl)imide) or lithium tetrafluoroborate. The metal or semimetal in the monomers AB and A1B1 is silicon, aluminum, titanium or zirconium, where the cationically polymerizable organic monomer units B and B1 in the corresponding monomers AB and A1B1 in each case are covalently bonded to M via one or more O, where in monomer AB, the metal or semimetal is silicon, the monomer unit A has two groups bonded to silicon over carbon, where the groups are 1-18C-alkyl, vinyl, 6-10C-aryl, 7-14C-alkylaryl or polyether containing group containing monomer units comprising ethylene oxide or propylene oxide, and the organic monomer unit B is covalently bonded to the metal or semimetal over two carbon atoms.    TECHNOLOGY FOCUS - POLYMERS - Preferred Process: The monomer AB is obtained by copolymerizing at least one first cationically polymerizable monomer unit A (which is covalently bonded to metal or semimetal via carbon atom of a group comprising 1-20C-hydrocarbyl or polyether containing group, and at least one second cationically polymerizable organic monomer unit B, which is bonded to the polymerizable unit A via one or more covalent bonds) with at least one monomer A1B1 in which at least one first cationically polymerizable monomer unit A1 has metal or semimetal, and at least one second polymerizable organic monomer B1, which is bonded to the polymerizable monomer unit A1 via one or more covalent chemical bonds, where the copolymerization takes place under cationic polymerization conditions in which the polymerizable monomers (a) and (A1) and the polymerizable monomer units (B) and (B1) are polymerized with breakage of the bonds between A and B, and (A1) and (B1). The polymerization takes place: further in the presence of a further component (E) comprising at least one inorganic (semi)metal oxide in the form of particles; and at 0-200 degrees C. Preferred Components: (a) is: at least partially penetrated by (b); and made of organic polymer, preferably polyolefins, polymers of heteroatom-containing vinyl monomers, polyesters, polyamides, polyimides, polyetheretherketones, polysulfones or polyoxymethylene. (c) is polyether, preferably polyethylene glycol, polypropylene glycol or a copolymer of ethylene oxide and propylene oxide. EXAMPLE - Pluriol A500E (RTM: Polyethylene glycol methyl ether with a molecular weight of about 500 g/mole) and lithium(bis(trifluoromethylsulfonyl)imide) were homogenized at 85 degrees C. Further 2,2-dimethyl-(4H-1,3,2-benzodioxasilyne) (266 mg) was added. Subsequently the mixture was then transferred into molten 2,2'-spirobi-(4H-1,3,2-benzodioxasilyne) (436 mg) and polymerized at 95 degrees C for 10 minutes using initiator solution consisting of tin tetrachloride (5.45 mg) in deuterated chloroform (56 mg) and transferred into polyethylene terephthalate and subsequently polymerized in an oven at 95 degrees C for 3 hours under nitrogen and heated at 195 degrees C for 30 min under vacuum to obtain composite materials with thicknesses of 30-90 mu m.