Electrochemical element, solid oxide fuel cell, and methods for producing the same

Abstract

Realized are an electrochemical element and a solid oxide fuel cell that have a dense electrolyte layer and that have excellent durability and robustness, and methods for producing the same. An electrochemical element includes: a metal substratehaving a plurality of through holes; an electrode layerprovided over a front face of the metal substrate; and an electrolyte layerprovided over the electrode layer, wherein the through holesare provided passing through the front face and a back face of the metal substrate, the electrode layeris provided in a region larger than a region, of the metal substrate, in which the through holesare provided, and the electrolyte layerhas a first portioncoating the electrode layer, and a second portionthat is in contact with the front face of the metal substrate