Abstract: A lithium-ion secondary battery that includes a positive electrode including a sulfur-based positive active material containing at least sulfur and a negative electrode including a silicon-based negative active material containing at least silicon or a tin-based negative active material containing tin, in which lithium ions are easily implanted and moved. A positive electrode includes a positive current collector and a sulfur-based positive active material containing at least sulfur (S). A negative electrode includes a negative current collector and a silicon-based negative active material containing at least silicon (Si) or a tin-based negative active material containing tin (Sn). The positive current collector is made of an aluminum foil having a plurality of through holes. The negative current collector is made of a copper foil having a plurality of through holes. The positive electrode and the negative electrode are stacked via a separator to form an electrode group.

Abstract: Provided herein is an electrical storage device that can reduce fluctuations in pressing force applied to different portions of an insulating ring member. Eight projections 19c are integrally provided on a surface of a plate-like portion 19b of an insulating ring member 19, which opposes an annular projected portion 15, to contact the annular projected portion 15. The projections 19c are disposed at constant intervals in the circumferential direction of an axial core 11. The projections 19c are each shaped to extend in the radial direction of the axial core 11, and each have a length to project inwardly of a top portion 15a of the annular projected portion 15 in the radial direction of the axial core 11, being in contact with the annular projected portion 15.

Abstract: There is provided a lithium-ion secondary battery that includes a positive electrode including a sulfur-based positive active material containing at least sulfur and a negative electrode including a silicon-based negative active material containing at least silicon or a tin-based negative active material containing tin, in which lithium ions are easily implanted and moved. There is also provided a method of manufacturing the lithium-ion secondary battery. A positive electrode 3 includes a positive current collector 4 and a sulfur-based positive active material 5 containing at least sulfur (S). A negative electrode 7 includes a negative current collector 8 and a silicon-based negative active material 9 containing at least silicon (Si) or a tin-based negative active material 9 containing tin (Sn). The positive current collector 4 is made of an aluminum foil having a plurality of through holes. The negative current collector 8 is made of a copper foil having a plurality of through holes.

Abstract: Provided herein is a capacitor in which an electrolyte is infiltrated into a wound electrode group faster than conventionally. A negative current collecting member 9 has one slit 57 formed to extend across a protruded portion 49 and a negative current collecting member body (first welding portion) 53 and to penetrate the protruded portion 49 and the negative current collecting member body 53 in a thickness direction. The slit 57 passes through the center of the protruded portion 49, and extends entirely across the protruded portion 49 such that both ends of the slit 57 reach the negative current collecting member body 53.

Abstract: Provided herein is an electrical storage device that can reduce fluctuations in pressing force applied to different portions of an insulating ring member. Eight projections 19c are integrally provided on a surface of a plate-like portion 19b of an insulating ring member 19, which opposes an annular projected portion 15, to contact the annular projected portion 15. The projections 19c are disposed at constant intervals in the circumferential direction of an axial core 11. The projections 19c are each shaped to extend in the radial direction of the axial core 11, and each have a length to project inwardly of a top portion 15a of the annular projected portion 15 in the radial direction of the axial core 11, being in contact with the annular projected portion 15.

Abstract: Provided herein is a capacitor in which an electrolyte is infiltrated into a wound electrode group faster than conventionally. A negative current collecting member 9 has one slit 57 formed to extend across a protruded portion 49 and a negative current collecting member body (first welding portion) 53 and to penetrate the protruded portion 49 and the negative current collecting member body 53 in a thickness direction. The slit 57 passes through the center of the protruded portion 49, and extends entirely across the protruded portion 49 such that both ends of the slit 57 reach the negative current collecting member body 53.

Abstract: A mass-producible lithium ion capacitor that allows lithium ions to be easily occluded by a negative electrode in advance is provided. A layered member includes: two copper foils each having a portion in which tabs are formed on one side along the longitudinal direction of the copper foils, and a portion in which a large number of through holes are formed and which is disposed adjacent to the portion with the tabs, and lithium metal having a thin plate shape and sandwiched between the copper foils to contact the portions with the through holes of the copper foils. The tabs are joined to a negative current collector ring, and electrically connected to a negative current collecting member. By leaving the layered member to stand for a predetermined period, it is possible to cause lithium ions to be occluded by a negative active material of the lithium ion capacitor.

Abstract: A method for the production of reformed p-vinylphenol polymers which are lightened in color comprising treating a p-vinylphenol polymer under heating at about 150.degree. C. to about 350.degree. C. in the presence of an amine, and if optionally, in the additional presence of an acid compound and/or a reducing agent, and if necessary, in the additional presence of an inert solvent.

Abstract: A polyion complex derived from a polyanion and a polycation of the general formula ##SPC1##And a process for preparing the polyion complex. A film having superior water permeability and high strength can be prepared from the polyion complex. The film is usable as an ultra-filtering membrane or dialyzing membrane.