Patent ID: 8481226
Filing Date: 2013-07-09
Classification: B32B,C04B,H01M,Y02E

Abstract:
1. A sheet body for a solid oxide fuel cell comprising; a solid electrolyte layer; a fuel electrode layer formed on an upper surface of the solid electrolyte layer and receiving a supply of a fuel gas from the upper surface of the fuel electrode layer; and an air electrode layer formed on a lower surface of the solid electrolyte layer and receiving a supply of a gas containing oxygen from the lower surface of the air electrode layer; wherein the solid electrolyte, fuel electrode, and air electrode layers are stacked and fired; wherein the fuel electrode layer is a fired body including at least particles of a first material for allowing an oxygen ion to pass, particles of a second material for allowing an electron to pass, and zircon particles, wherein the zircon particles are uniformly distributed in the plane direction of the fuel electrode layer; wherein the fuel electrode layer is a laminate of a continuous first layer formed on the upper surface of the solid electrolyte layer and composed of the particles of the first and second materials, and a continuous second layer formed on and covering an entirety of the upper surface of the first layer and composed of the particles of the first and second materials and the zircon particles, wherein the zircon particles are uniformly distributed in the plane direction and the stacking direction, and wherein a diameter of the particles of the first material contained in the second layer is within a range of 0.3 to 1.5 μm, a diameter of the particles of the second material contained in the second layer is within a range of 0.5 to 2 μm, and a diameter of the zircon particles contained in the second layer is within a range of 0.7 to 2.5 μm; and wherein a thickness of the solid electrolyte layer is within a range of 0.1 to 30 μm, a thickness of the fuel electrode layer is within a range of 50 to 500 μm, and the thickness of the air electrode layer is within the range of 3 to 50 μm.