TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic particles comprise colloidal silica, alpha -alumina, gamma -alumina, zirconium oxide and/or magnesium fluoride. The first nanoparticles: are polymer particles or inorganic particles; have no glass transition temperature; comprise metal fluoride, metal nitride, metal carbide and magnesium fluoride; and are not colored when dipped in an organic electrolyte solution including a lithium salt at 70 degrees C for 72 hours. The coupling agent does not comprise a metalloid element. The anode active material comprises silicon, tin, lead, germanium, aluminum, silicon oxide of formula (SiOx), tin oxide, lithium titanium oxide (Li4Ti5O12), lithium titanate, titanium dioxide, lithium titanate, and lithium titanate (Li2Ti3O7).x = 0-2.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The polar functional group is a carboxyl group, a hydroxy group, an amine group and/or a glycidyl group.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The binder composition comprises a first polymer binder aggregate of at least two first polymer binders. The binder composition further comprises fillers, a matrix, a solvent and a coupling agent for chemically binding the first nanoparticles and the first polymer binder. Preferred Components: The amount of the first nanoparticles is 1-60 pts. wt. The first nanoparticles are randomly dispersed in the first polymer binder. The first nanoparticles are randomly disposed in an interface between the two first polymer binders. The first nanoparticles comprise polyethylene, polypropylene, ethylene-propylene copolymer, polyvinylchloride, polyvinylidenechloride, polystyrene, polyacrylonitrile, polytetrafluoroethylene, polymethylmethacrylate, polyvinylacetate, polyisoprene, polychloroprene, polyester, polycarbonate, polyamide, polyacrylate, polyurethane, an acrylonitrile-butadiene-styrene copolymer, polyoxyethylene, polyoxymethylene, polyoxypropylene, styrene-acrylonitrile copolymer, acrylonitrile-styrene-acrylate copolymer, styrene-butadiene copolymer, acrylated styrene-butadiene copolymer, acrylonitrile-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, acryl rubber, butyl rubber, fluorine rubber, polyvinylpyrolidone, polyepichlorohydrin, polyphosphazene, an ethylene propylene diene copolymer, polyvinylpyridine, chlorosulfonated polyethylene, polysulfone, polyvinylalcohol, thermoplastic polyester rubber, carboxymethyl cellulose, hydroxypropylmethyl cellulose, hydroxypropyl cellulose and/or diacetyl cellulose. The first polymer binder comprises styrene-butadiene rubber, acrylated styrene-butadiene rubber, acrylonitrile-butadiene rubber, acrylonitrile-butadiene-styrene rubber, acryl rubber, butyl rubber, fluorine rubber, polytetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene copolymer, polyethylene oxide, polyvinylpyrolidone, polyepichlorohydrin, polyphosphazene, polyacrylate, polyacrylonitrile, polystyrene, ethylene propylene diene copolymer, polyvinylpyridine, chlorosulfonated polyethylene, latex, polyester resin, acryl resin, phenolic resin, epoxy resin, polyvinylalcohol, carboxymethyl cellulose, hydroxypropylmethyl cellulose, hydroxypropyl cellulose and/or diacetyl cellulose. The first polymer binder: comprises a polar functional group to chemically bind to the first nanoparticles; has a gel content of less than or equal to 90%; is inert with respect to at least one of protonic acid and Lewis acid; and has a breaking strength of greater than or equal to 25 Kg/cm2, preferably greater than or equal to 30 Kg/cm2, as measured in a binder film impregnated with an electrolyte. The polymer particles are polyurethane or crosslinked polymer particles. The crosslinked polymer particles are crosslinked polymethylmethacrylate. The filler is dispersed in an elastic matrix of the first polymer binder. EXAMPLE - 30 pts. wt. Polymer emulsion having solid content of 15 wt.% and diameter of 70 nm, and 4 pts. wt. carbodiimide coupling agent were added to 100 pts. wt. polymer emulsion BM451B having solid content of 40 wt.% and an average particle diameter of 120 nm and stirred for 10 minutes to prepare a binder composition having solid content of 29 wt.%.