Disclosed are a corona-resistant enameled round wire and preparation method therefor. The corona-resistant enameled round wire is suitable for electric vehicle motors and comprises a copper conductor and an insulating layer, wherein the insulating layer clads the copper conductor and comprises, in sequence from inside to outside, a corona-resistant polyamideimide coating, a corona-resistant special resin coating, a corona-resistant polyimide coating, a corona-resistant modified silicone resin coating, and a corona-resistant polyamideimide coating.

An insulated electric conductor includes a flat or round wire made of one or more electrically conductive materials, the flat or round wire having an exterior surface that is free of an oxide layer; and an insulating layer adhering directly to the oxide-layer-free exterior surface to form a coating around the oxide-layer-free exterior surface, the insulating layer being made of at least one thermoplastic material which provides electrical insulation. The flat or round wire is designed to conduct an electrical current.

Provided is a method for producing a material that suppresses a decrease in the life of an insulation against surge voltage, that is, a material that provides a long dielectric breakdown lifetime. The method is a method for producing a fullerene-derivative-containing resin composition containing a fullerene derivative and a resin that has an affinity for a polar solvent, including: a step (I) of dispersing a fullerene derivative in a polar solvent; and a step (II) of mixing the polar solvent in which the fullerene derivative is dispersed with a resin that has an affinity for the polar solvent.

A silica sol dispersed in a nitrogen-containing solvent and a silica-containing resin composition containing a nitrogen atom-containing polymer. A silica sol including silica particles containing aluminum atoms and having an average primary particle diameter of 5 to 100 nm, the silica particles being dispersed in a nitrogen-containing solvent, wherein the aluminum atoms are bonded to the surfaces of the silica particles in an amount in terms of Al.sub.2O.sub.3 of 800 to 10,000 ppm/SiO.sub.2. The silica particles are bonded to a silane compound or a hydrolysate of the silane compound. The nitrogen-containing solvent is an amide solvent. The nitrogen-containing solvent is dimethylacetamide, dimethylformamide, N-methylpyrrolidone, or N-ethylpyrrolidone. The insulating resin composition includes the silica sol and a nitrogen-containing polymer. The nitrogen-containing polymer is polyimide, polyamide, polyamic acid, polyamideimide, polyetherimide, or polyesterimide. An insulation-coated conductor wire produced by insulation coating of a conductor wire with the insulating resin composition.

A silica sol dispersed in a nitrogen-containing solvent and a silica-containing resin composition containing a nitrogen atom-containing polymer. A silica sol including silica particles containing aluminum atoms and having an average primary particle diameter of 5 to 100 nm, the silica particles being dispersed in a nitrogen-containing solvent, wherein the aluminum atoms are bonded to the surfaces of the silica particles in an amount in terms of Al.sub.2O.sub.3 of 800 to 10,000 ppm/SiO.sub.2. The silica particles are bonded to a silane compound or a hydrolysate of the silane compound. The nitrogen-containing solvent is an amide solvent. The nitrogen-containing solvent is dimethylacetamide, dimethylformamide, N-methylpyrrolidone, or N-ethylpyrrolidone. The insulating resin composition includes the silica sol and a nitrogen-containing polymer. The nitrogen-containing polymer is polyimide, polyamide, polyamic acid, polyamideimide, polyetherimide, or polyesterimide. An insulation-coated conductor wire produced by insulation coating of a conductor wire with the insulating resin composition.

A battery and a method of constructing a battery are disclosed in which a first conductive substrate portion has a first face and a second conductive substrate portion has a second face opposed to the first face. A first electrode material is disposed in electrical contact with the first face, an electrolyte material is disposed in contact with the first electrode material, a second electrode material is disposed in contact with the electrolyte material, and a conductive tab disposed in contact with the second electrode material. The first conductive substrate portion, the first electrode material, and the conductive tab extend outward beyond a particular edge of the second conductive substrate portion.

Coated conductors comprising a conductor and elongated polymeric coatings at least partially surrounding the conductor, where the elongated polymeric coatings comprise a polymeric matrix material and a plurality of microcapillaries containing an elastomeric polymeric material. Also disclosed are dies and methods for making such coated conductors.

A sheathed wire harness includes connectors to be fitted to counterpart connectors, electric wires connected to the connectors, and a fibrous resin cloth that is connected to the electric wires and surrounds the electric wires. The resin cloth includes a cover portion that can be moved to a closed position in which portions of the electric wires near the connectors are covered, and moved to an open position in which the portions of the electric wires near the connectors are exposed.

Disclosed is an enameled wire comprising a metal wire, in particular a copper wire, which is coated with an electrically insulating varnish containing at least one varnish polymer. Fluorine atoms are bonded to the outer surface of the varnish by substitution or radical substitution as a result of a treatment of the outer surface with fluorine or fluorine gas.

Disclosed is an enameled wire comprising a metal wire, in particular a copper wire, which is coated with an electrically insulating varnish containing at least one varnish polymer. Fluorine atoms are bonded to the outer surface of the varnish by substitution or radical substitution as a result of a treatment of the outer surface with fluorine or fluorine gas.