An electric energy storage device has an inner terminal disposed in a cylindrical metal case and connected to an electrode of a bare cell, wherein the inner terminal includes a plate-shaped terminal body having a circular outer circumference; at least one electrolyte impregnation hole formed through the terminal body in a thickness direction; a flange located at the outer circumference of the terminal body and extending perpendicular to a plane of the terminal body; and a spacer formed to protrude at a periphery of at least one impregnation hole among the impregnation holes or formed by protruding a part of the plane of the terminal body.

An electric energy storage device has an inner terminal disposed in a cylindrical metal case and connected to an electrode of a bare cell, wherein the inner terminal includes a plate-shaped terminal body having a circular outer circumference; at least one electrolyte impregnation hole formed through the terminal body in a thickness direction; a flange located at the outer circumference of the terminal body and extending perpendicular to a plane of the terminal body; and a spacer formed to protrude at a periphery of at least one impregnation hole among the impregnation holes or formed by protruding a part of the plane of the terminal body.

Provided is an electrical storage device that is compact and can be manufactured easily, while allowing for use of higher voltages. In an electrical storage device, a winding structure comprises: a central electrode body in which a first extending part and a second extending part extending from either side of a central portion are wound around the central portion in the same direction; a first electrode body electrically connected to a first external terminal and extending toward an outer peripheral side from a vicinity of the central portion; a second electrode body electrically connected to a second external terminal and extending toward the outer peripheral side from a vicinity of the central portion; a first separator disposed between the central electrode body and the first electrode body; and a second separator disposed between the central electrode body and the second electrode body.

An electric double-layer capacitor that includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive-electrode collector electrode and a positive-electrode polarizable electrode on the positive-electrode collector electrode. The negative electrode includes a negative-electrode collector electrode and a negative-electrode polarizable electrode on the negative-electrode collector electrode. The negative electrode faces the positive electrode. The electrolyte is interposed between the positive electrode and the negative electrode. A separator is provided between the positive-electrode polarizable electrode and the negative-electrode polarizable electrode adjacent to each other. No polarizable electrode is provided on an outer surface of the collector electrode of each one of the positive electrode and the negative electrode positioned outermost in a thickness direction of the electric double-layer capacitor.

A package electric double-layer capacitor having a first terminal that extends from a package at a first corner of a first cell, which is adjacent to a second cell, on one side in a second direction orthogonal to a first direction. A second terminal extends from the package at the first corner in the first direction and on a side of the first terminal opposite to the second cell. A third terminal extends from the package at a second corner of the second cell, which is adjacent to the first cell and the first corner. A fourth terminal extends from the package at the second corner in the first direction and on a side of the third terminal opposite to the first cell.

A package electric double-layer capacitor having a first terminal that extends from a package at a first corner of a first cell, which is adjacent to a second cell, on one side in a second direction orthogonal to a first direction. A second terminal extends from the package at the first corner in the first direction and on a side of the first terminal opposite to the second cell. A third terminal extends from the package at a second corner of the second cell, which is adjacent to the first cell and the first corner. A fourth terminal extends from the package at the second corner in the first direction and on a side of the third terminal opposite to the first cell.

An asymmetric nanocomposite supercapacitor and a method of making the asymmetric nanocomposite supercapacitor. The asymmetric nanocomposite supercapacitor includes a negative electrode with monoclinic tungsten oxide (m-WO.sub.3) nanoplates, and a binding compound coated on one face of a substrate, and a positive electrode with a carbonaceous material and a binding compound coated on one face of a substrate. Where the face of the positive electrode and the face of the negative electrode coated with the carbonaceous material and m-WO.sub.3 nanoplates, respectively, are separated by and in direct contact with a porous separator.

An asymmetric nanocomposite supercapacitor and a method of making the asymmetric nanocomposite supercapacitor. The asymmetric nanocomposite supercapacitor includes a negative electrode with monoclinic tungsten oxide (m-WO.sub.3) nanoplates, and a binding compound coated on one face of a substrate, and a positive electrode with a carbonaceous material and a binding compound coated on one face of a substrate. Where the face of the positive electrode and the face of the negative electrode coated with the carbonaceous material and m-WO.sub.3 nanoplates, respectively, are separated by and in direct contact with a porous separator.

The present invention relates to a nano-porous electrode for a super capacitor and a manufacturing method thereof, and more specifically, to a nano-porous electrode for a super capacitor and a manufacturing method thereof wherein pores are formed on the surface or inside an electrode using an electrodeposition method accompanied by hydrogen generation, thereby increasing the specific surface area of the electrode and thus improving the charging and discharging capacity, energy density, output density, and the like of a capacitor. The method for manufacturing a nano-porous electrode for a super capacitor according to the present invention manufactures a nano-porous electrode using hydrogen generated by the electrodeposition as a template to minimize the amount of metal used, so that electrode manufacturing costs can be sharply reduced, the specific surface area of the electrode can be adjusted by a simple process, and also the charging and discharging capacity, energy density, output density, and the like of a capacitor can be improved by increasing the specific surface area.

The present invention relates to a nano-porous electrode for a super capacitor and a manufacturing method thereof, and more specifically, to a nano-porous electrode for a super capacitor and a manufacturing method thereof wherein pores are formed on the surface or inside an electrode using an electrodeposition method accompanied by hydrogen generation, thereby increasing the specific surface area of the electrode and thus improving the charging and discharging capacity, energy density, output density, and the like of a capacitor. The method for manufacturing a nano-porous electrode for a super capacitor according to the present invention manufactures a nano-porous electrode using hydrogen generated by the electrodeposition as a template to minimize the amount of metal used, so that electrode manufacturing costs can be sharply reduced, the specific surface area of the electrode can be adjusted by a simple process, and also the charging and discharging capacity, energy density, output density, and the like of a capacitor can be improved by increasing the specific surface area.