Patent 7279241 was granted and assigned to Corning Incorporated on October, 2007 by the United States Patent and Trademark Office.
An electrolyte sheet comprises a substantially non-porous body and has at least one stress-relief area on at least a portion of the electrolyte sheet. The stress-relief area has a surface with a plurality of folds. The plurality of folds are arranged around and directed longitudinally toward a common central area.