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:
Jul. 12, 2005
Filed:
Nov. 05, 2001
Emad Batawi, Winterthur, CH;
Kaspar Honegger, Wallenwil, CH;
Emad Batawi, Winterthur, CH;
Kaspar Honegger, Wallenwil, CH;
Sulzer Hexis AG, Winterthur, CH;
Abstract
A fuel cell having a solid electrolyte layer () forms together with two electrode layers () a plate-like multiple layer system (). The layers are applied by means of coating procedures to an open-pored, electrically conducting carrier structure () in the sequence anode (), electrolyte () and cathode (). This multiple layer system () has an outer edge which is exposed during a current generating operation of the fuel cell to an external environment () which contains molecular oxygen. The material of the carrier structure assumes an oxidized or a reduced state in thermodynamic equilibrium at the operating temperature of the fuel cell depending on the environment. The outer edge () of the multiple layer plate is covered over with an inert material. At the operating temperature of the fuel cell this edge covering () forms a barrier which inhibits or prevents the transport of molecular oxygen out of the external environment () into the carrier structure. The material is in particular YSZ, i.e. zirconium dioxide ZrOwhich is stabilized with yttrium oxide YO.