Abstract: According to one embodiment, there is provided a secondary battery. This secondary battery includes an electrode and an organic-fiber layer. The electrode includes a current collector including an edge part, an active material-containing layer including an end part supported on the edge part, and a current-collecting tab including a surface a part of which is adjacent to the edge part. The organic-fiber layer is bonded with the end part of the active material-containing layer with maximum thickness and with the part of the surface of the current-collecting tab.

Abstract: According to one embodiment, there is provided a structural body including a core composed of fiber and a support, which is a component of the core and is in contact with the core.

Abstract: According to the embodiment, a nanofiber manufacturing device that includes an ejector and a power generator is provided. The ejector is capable of ejecting a solution from a head portion toward a target. The power generator generates a potential difference between the head portion and the target. The head portion includes a first guide having a first surface and a second guide having a second surface, the first surface and the second surface making a gap, the gap being capable of maintaining the solution. A tip of at least one of the first guide and the second guide includes a maintain portion provided so as to be capable of maintaining the solution.

Abstract: According to one embodiment, a press apparatus for an electrode, includes, a press unit configured to compress an electrode sheet includes a first region formed with an electrode layer on a surface thereof and a second region on which the electrode layer is not formed, and a stretching unit includes a stretching member, which comprises a projecting surface located opposite the electrode sheet and projecting toward the electrode sheet, in a position corresponding to the second region, a retracted surface retracted from the electrode sheet relative to the projecting surface, in a position corresponding to the first region, and a relief surface retracted away from the electrode sheet, in a position corresponding to an edge portion of the electrode sheet.

Abstract: According to one embodiment, a lithium-ion secondary battery includes a first current collector, a first layer, and a separator. The first current collector has a plurality of first recesses on a surface of the first current collector. The first layer is provided on the first current collector. The layer includes a first active material body, a first binder, and a first conductive body. The separator is provided in the first recesses via the first layer and including a fiber.

Abstract: According to an embodiment, a battery includes a positive electrode, a negative electrode, a separator, and a filler portion. The separator is provided between the positive electrode and the negative electrode, and does not allow the passage of electrons and allows the passage of ions. The filler portion fills a depression provided in a positive electrode active material layer of the positive electrode or a negative electrode active material layer of the negative electrode, and does not allow the passage of electrons and allows the passage of ions.

Abstract: An optical-waveguide sensor chip includes an optical waveguide having a first substance immobilized on the surface thereof, the first substance being specifically reactive with an analyte substance, and fine particles dispersed on the optical waveguide and having a second substance immobilized on the surface thereof, the second substance being specifically reactive with the analyte substance.

Abstract: According to one embodiment, the secondary battery includes a container, an electrode structure provided in the container and an electrolyte provided in the container. The electrode structure includes a positive electrode, a negative electrode, and a separator provided between the positive electrode and the negative electrode. The separator includes an organic fiber layer accumulated on at least one of the positive electrode and the negative electrode. The organic fiber layer has contacts in which the organic fiber intersects with itself. The form of the intersections is changed by a tensile stress.

Abstract: According to one embodiment, a double-sided coating apparatus includes a first coating head arranged on one side of a raw material to coat the one side with a coating liquid by alternately forming a coating region and a non-coating region in a direction crossing a delivery direction, a second coating head arranged on the other side of the raw material to coat the other side with the coating liquid by alternately forming the coating region and the non-coating region in the direction crossing the delivery direction, and a coating roller arranged near a position on the one side of the raw material and opposite to the second coating head across the raw material and having a large-diameter portion and a small-diameter portion with different diameters along an axial direction with the small-diameter portion opposite to the coating region and the large-diameter portion opposite to the non-coating region.

Abstract: According to one embodiment, there is provided a secondary battery. This secondary battery includes an electrode and an organic-fiber layer. The electrode includes a current collector including an edge part, an active material-containing layer including an end part supported on the edge part, and a current-collecting tab including a surface a part of which is adjacent to the edge part. The organic-fiber layer is bonded with the end part of the active material-containing layer with maximum thickness and with the part of the surface of the current-collecting tab.

Abstract: According to one embodiment, a lithium-ion secondary battery includes a first current collector, a first layer, and a separator. The first current collector has a plurality of first recesses on a surface of the first current collector. The first layer is provided on the first current collector. The layer includes a first active material body, a first binder, and a first conductive body. The separator is provided in the first recesses via the first layer and including a fiber.

Abstract: According to one embodiment, a secondary battery electrode includes a current collector, and a layer. The layer is provided on the current collector. The layer includes a plurality of active material bodies and a fiber provided between adjacent active material bodies out of the active material bodies, and connects the adjacent active material bodies to each other.

Abstract: According to one embodiment, a manufacturing method of an electrode, includes coating a first surface of a current collector with slurry, coating a second surface of the current collector with the slurry, and drying. The first and second surfaces are coated with the slurry in such a way that a slurry coated portion and a slurry non-coated portion are alternately arranged in a direction perpendicular to a moving direction of the current collector. The slurry non-coated portion is arranged on annular protruding portions of a backup roll. The slurry coated portion is dried by a drying apparatus. A formula (1), 0<L1, and a formula (2), 0<L2, are satisfied.

Abstract: According to one embodiment, a manufacturing method of an electrode, includes coating first and second surfaces of a current collector with slurry, and drying. The first surface is coated with the slurry in such a way that a slurry coated portion and a slurry non-coated portion are alternately arranged in a direction perpendicular to a moving direction of the current collector. The slurry non-coated portion is arranged on annular protruding portions of a backup roll. The second surface excluding a portion arranged on the annular protruding portions is coated with the slurry, thereby forming the slurry coated portion. Next, the slurry coated portions are dried.

Abstract: According to one embodiment, a manufacturing method of an electrode includes supplying a current collector, coating the current collector with a slurry and drying the slurry. In the manufacturing method of the electrode, the current collector is supplied onto a backup roll including annular protruding portions formed on an outer circumferential surface of the backup roll. A surface of the current collector excluding a portion arranged on a plurality of the annular protruding portions is coated with slurry containing an active material. And, then, the slurry is dried.

Abstract: An optical-waveguide sensor chip includes an optical waveguide having a first substance immobilized on the surface thereof, the first substance being specifically reactive with an analyte substance, and fine particles dispersed on the optical waveguide and having a second substance immobilized on the surface thereof, the second substance being specifically reactive with the analyte substance.

Abstract: An optical-waveguide sensor chip includes an optical waveguide having a first substance immobilized on the surface thereof, the first substance being specifically reactive with an analyte substance, and fine particles dispersed on the optical waveguide and having a second substance immobilized on the surface thereof, the second substance being specifically reactive with the analyte substance.

Abstract: According to one embodiment, a method for producing an electrode, includes applying tensile force. The electrode includes a strip current collector, a current collector exposed portion, and an active material-containing layer. In the applying tensile force, arranging a strip electrode plate on a roller including a step portion and a recessed portion such that the current collector exposed portion is positioned on the step portion and the active material-containing layer is positioned on the recessed portion, and then applying tensile force to the strip electrode plate in a longitudinal direction of the strip electrode plate.

Abstract: According to one embodiment, a press apparatus for an electrode, includes, a press unit configured to compress an electrode sheet includes a first region formed with an electrode layer on a surface thereof and a second region on which the electrode layer is not formed, and a stretching unit includes a stretching member, which comprises a projecting surface located opposite the electrode sheet and projecting toward the electrode sheet, in a position corresponding to the second region, a retracted surface retracted from the electrode sheet relative to the projecting surface, in a position corresponding to the first region, and a relief surface retracted away from the electrode sheet, in a position corresponding to an edge portion of the electrode sheet.

Abstract: An optical glucose sensor chip includes a substrate, a pair of optical elements formed on a surface of the substrate for introducing light into the substrate and for emitting the light from the substrate, and a glucose sensing membrane formed on the surface of the substrate at a position between the optical elements. The sensing membrane includes a color reagent substrate, a first enzyme which oxidizes or reduces glucose, a second enzyme that generates a material which makes the color reagent substrate exhibit color by a reaction with a product obtained by oxidation or reduction of glucose, a nonionic cellulose derivative, and an ionic polymer into which a buffer is incorporated. At least one of the first and second enzymes is coated with the ionic polymer, and the color reagent substrate. The first and second enzymes, the buffer and the ionic polymer are supported by the nonionic cellulose derivative.