Steve P. Simner
Pacific Northwest National Laboratory
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Publication
Featured researches published by Steve P. Simner.
Electrochemical and Solid State Letters | 2006
Steve P. Simner; Mark H. Engelhard; Jeffry W. Stevenson
The long-term stability of anode-supported YSZ electrolyte SOFCs utilizing (La0.6Sr0.4)0.98Co0.2Fe0.8O3-? (LSCF-6428) cathodes was assessed. Samples tested for 500 hours at 750 C and 0.7V indicated ?50% degradation. While scanning electron microscopy (SEM) and energy dispersive x-ray (EDX) analysis indicated no obvious microstructural or chemical phenomena that could explain the high degradation, x-ray photon spectroscopy (XPS) revealed that enrichment of Sr at the cathode-electrolyte and cathode-current collector interfaces was at least partially responsible for the observed degradation.
Electrochemical and Solid State Letters | 2002
Steve P. Simner; Jeff F. Bonnett; Nathan L. Canfield; Kerry D. Meinhardt; Vince L. Sprenkle; Jeffry W. Stevenson
Three cathode compositions (La0.8Sr0.2FeO3-d, La0.7Sr0.3Fe0.8Ni0.2O3-d and LaNi0.6Fe0.4O3-d) have been tested as SOFC cathodes at operating temperatures from 650 degrees C to 750 degrees C. Sintering temperatures were established for each cathode composition to provide optimized cell performance. La0.8Sr0.2FeO3-d exhibited the highest power density (> 900 mW/cm2 at 750 degrees C and 0.7 V), and indicated excellent performance stability over a 300 hour period.
SAE 2002 World Congress & Exhibition | 2002
Kevin R. Keegan; Mohammad A. Khaleel; Lawrence A. Chick; Kurtis P. Recknagle; Steve P. Simner; John E. Deibler
The solid oxide fuel cell (SOFC) system has emerged as an important technology for automotive and stationary applications. Modeling and simulation of the SOFC system have been utilized as an integral tool in an accelerated joint SOFC system development program. Development of unique modeling approaches and their results are discussed and compared with experimental performance. One dimensional system level analysis using Aspen with an embedded stack electro-chemical model was performed resulting in effective sub-system partitioning and requirements definition. Further, a three-dimensional integrated electro-chemical/thermal/computational fluid dynamics analysis of steady-state operation was employed. The combination of one-dimensional and three-dimensional environments led to effective performance projection at all levels in the system, resulting in optimization of overall system performance early in the design cycle.
Journal of Power Sources | 2003
Steve P. Simner; Jeff F. Bonnett; Nathan L. Canfield; Kerry D. Meinhardt; Jayne P. Shelton; Vince L. Sprenkle; Jeffry W. Stevenson
Journal of The Electrochemical Society | 2003
Rick E. Williford; Lawrence A. Chick; Gary D. Maupin; Steve P. Simner; Jeffry W. Stevenson
Solid State Ionics | 2004
Steve P. Simner; Michael D. Anderson; Jeff F. Bonnett; Jeffry W. Stevenson
Archive | 2001
Steve P. Simner; Kerry D. Meinhardt; Nathan L. Canfield; Jeffry W. Stevenson
Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4 | 2008
Zhenguo Yang; Xiao‐Hong Li; Gary D. Maupin; Prabhakar Singh; Steve P. Simner; Jeffry W. Stevenson; Guanguang Xia; X.-D. Zhou
Archive | 2003
Steve P. Simner; Michael D. Anderson; Jeffry W. Stevenson
intersociety energy conversion engineering conference | 2001
Prabhakar Singh; Larry R. Pederson; Steve P. Simner; Jeffry W. Stevenson; Vish Viswanathan
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