The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2001
Filed:
Oct. 14, 1999
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
A solid oxide fuel cell and method of making same is disclosed. An electrolyte layer of an oxide ion conductor material that may be specified by La,A,Ga,B,Co,O,and an air electrode layer of an electron conductor material that may be specified by La,A,CoO,are laminated, preferably with an intermediate layer of an electron and ion mixed conductor material that may be specified by La,A,Ga,B,Co,O,interposed therebetween. The laminate may be sintered to integrate the layers, and may then subjected to a heat treatment to cause elements to diffuse through an interface between adjoining layers. The composition in each interface is thus continuously changed. Here, A may be at least one element selected from the group consisting of Sr and Ca, B may be at least one element selected from the group consisting of Mg, Al, and In, and 0.05≦a≦0.3, 0≦b, e≦0.3, 0≦c≦0.15, b+c≦0.3, 0≦d≦0.5, 0≦f≦0.15, 0.15<g≦0.3, and f+g≦0.3. The cell is free from cracks distortion, delamination, and the increase in interface resistance under thermal stress during sintering is reduced. In addition, an increase in the reaction area in an air electrode results in an improved cell efficiency.