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:
Feb. 28, 2012
Filed:
Dec. 11, 2009
Kailash C. Jain, Troy, MI (US);
Joseph M. Keller, Grand Blanc, MI (US);
Rick D. Kerr, Fenton, MI (US);
Kailash C. Jain, Troy, MI (US);
Joseph M. Keller, Grand Blanc, MI (US);
Rick D. Kerr, Fenton, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
An improved LSCF 6428 perovskite material of the type LaSrCoFeOwherein x=0.4, z=(0-0.1), a=(0.01-0.04), and b=(0.05-0.15) for use as an SOFC cathode having increased electronic and ionic conductivity. The general formula is similar to the prior art formulae (LaSr)CoFeOand LaSrCoFeObut applies the z term to La and Sr independently as well as reducing the overall content of La. Further, by adding a small amount (a) of extra Co ions, catalytic activity, conductivity, and sinterability are further enhanced. Adding small amounts (b) of Fe and/or Fe and Co moderates the thermal expansion coefficient with no adverse effect on crystal structure or fuel cell performance. Improved sinterability, microstructure, and reduced film cracking result in high power density of fuel cells. An inherently low-cost solid state reaction method is described.