Abstract: The invention presents an electrode for an electrochemical element for inserting and extracting a lithium ion reversibly, comprising a current collector forming a concave portion and a convex portion at least on one side, and a columnar body including an active material formed on the convex portion of the current collector, in which the columnar body covers at least a part of respective sides of the convex portion. By this configuration, an electrode for an electrochemical element of long life and excellent reliability is realized.

Abstract: Disclosed is an all-solid-state electric double layer capacitor comprising a solid electrolyte and a current collector, wherein the solid electrolyte is an inorganic solid electrolyte. Such a capacitor has high capacity and is free from any fear of leakage of an electrolytic solution, and also ensures high heat resistance and enables a low process cost.

Abstract: A method for producing a solid state battery including the steps of: (a) obtaining an active material slurry; (b) obtaining a solid electrolyte slurry; (c) obtaining a current collector slurry; (d) forming an active material green sheet and a solid electrolyte green sheet; (e) laminating the solid electrolyte green sheet on one surface of the active material green sheet to form a first green sheet group, and forming a current collector green sheet layer on the other surface of the active material green sheet to form a second green sheet group; (f) heating the second green sheet group at not less than 200° C. and not greater than 400° C. in an oxidizing atmosphere; and (g) baking the second green sheet group having heated in the step (f) in a low oxygen atmosphere at a baking temperature higher than the heating temperature in the step (f) to obtain a laminate.