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Full-Text Articles in Engineering
Characterization Of Sr‐Doped Lamno3 And Lacoo3 As Cathode Materials For A Doped Lagao3 Ceramic Fuel Cell, Kevin Huang, Man Feng, John B. Goodenough, Michael Schmerling
Characterization Of Sr‐Doped Lamno3 And Lacoo3 As Cathode Materials For A Doped Lagao3 Ceramic Fuel Cell, Kevin Huang, Man Feng, John B. Goodenough, Michael Schmerling
Kevin Huang
Energy dispersive spectrometry line scan and ac impedance spectroscopy were used in this study to investigate the chemical reactions between two cathode materials, La0.84Sr0.16MnO3 (LSM), La0.5Sr0.5CoO3-δ (LSC), and the electrolyte La0.9Sr0.1Ga0.8Mg0.2O2.85 (LSGM). Significant interdiffusions of Co into LSGM and Ga into LSC were found at an LSC/LSGM interface even at relatively low fabrication temperatures. In contrast, only small interdiffusions of Mn into LSGM and Ga into LSM were detected at the LSM/LSGM interface even though it was fired at 1470°C. The …
Development Of Delta-Type High Power Density Solid Oxide Fuel Cells At Siemens Stationary Fuel Cells, Kevin Huang
Development Of Delta-Type High Power Density Solid Oxide Fuel Cells At Siemens Stationary Fuel Cells, Kevin Huang
Kevin Huang
This paper describes recent development in Siemens Stationary Fuel Cells of Delta-type high power density solid oxide fuel cells, the foundation for future high power and high efficiency electrical power generation. Relatively high-level overviews are given in the areas of cell materials, basic cell design, basic bundle design and basic module design. The testing results of six-cell Delta 9 bundle and single Delta 8 cell are particularly highlighted to demonstrate the unique advantage of high power density and high total power presented by Delta geometry.
Sr‐ And Ni‐Doped Lacoo3 And Lafeo3 Perovskites: New Cathode Materials For Solid‐Oxide Fuel Cells, Kevin Huang, Hee Y. Lee, John B. Goodenough
Sr‐ And Ni‐Doped Lacoo3 And Lafeo3 Perovskites: New Cathode Materials For Solid‐Oxide Fuel Cells, Kevin Huang, Hee Y. Lee, John B. Goodenough
Kevin Huang
An improved cathode material for a solid‐oxide fuel cell would be a mixed electronic and oxide‐ion conductor with a good catalytic activity for oxygen reduction at an operating temperature T op ≥ 700°C and a thermal expansion matched to that of the electrolyte and interconnect. We report on the properties of Sr‐ and Ni‐doped LaCoO3 and LaFeO3 perovskites that meet these criteria. Single‐phase regions were determined by X‐ray diffraction, and thermogravimetric analysis measurements were used to obtain the temperatures above which oxygen loss, and hence oxide‐ion conductivity, occurs. The conductivity and Seebeck measurements indicate the coexistence of both …
Effects Of Testing Configurations And Cell Geometries On The Performance Of A Sofc: A Modeling Approach, Daan Cui, Chenghao Yang, Kevin Huang, Fanglin Chen
Effects Of Testing Configurations And Cell Geometries On The Performance Of A Sofc: A Modeling Approach, Daan Cui, Chenghao Yang, Kevin Huang, Fanglin Chen
Kevin Huang
No abstract provided.
Increasing Power Density Of Lsgm-Based Solid Oxide Fuel Cells Using New Anode Materials, Kevin Huang, Jen-Hau Wan, John Goodenough
Increasing Power Density Of Lsgm-Based Solid Oxide Fuel Cells Using New Anode Materials, Kevin Huang, Jen-Hau Wan, John Goodenough
Kevin Huang
Chemical reactions between the superior perovskite oxide-ion conductor Sr- and Mg-doped LaGaO3 (LSGM), CeO2, and NiO have been studied by powder X-ray diffraction. The results showed that an extensive reactivity occurs as a result of La migration driven by a gradient of La chemical activity. La migration across the LSGM/electrode interfaces in a fuel cell leads to the formation of resistive phases at the interface, either LaSrGa3O7 or LaSrGaO4. Use of 40 mol % La2O3 -doped CeO2 as an interlayer between anode and electrolyte as well as in the NiO-containing anode prevents all reactions found. Consequently, the air-H2 cell maximum …
Low Temperature Densification And Electrical Property Of A Carbonate-Added Proton Conducting Ceramic, Xue Li, Nansheng Xu, Lingling Zhang, Kevin Huang
Low Temperature Densification And Electrical Property Of A Carbonate-Added Proton Conducting Ceramic, Xue Li, Nansheng Xu, Lingling Zhang, Kevin Huang
Kevin Huang
Proton conducting yttrium-doped barium zirconate (BZY) is one of the most studied materials for SOFC applications due to its high bulk proton conductivity, good chemical stability under CO2 and mechanical robustness. However, it requires a very high temperature (1700-2100°C) and long sintering time (>24 h), even with nano-sized powers, to sinter into a dense ceramic. In this paper, we demonstrate a unique approach to make a dense BZY at much lower temperatures. The method involves prefabrication of a porous BZY matrix by solid-state reaction from micro-sized powders of BaCO3, ZrO2 and Y2O3 and densification by impregnating the porous BZY …
Synthesis Of Mixed Oxide-Ion And Carbonate-Ion Conductors Supported By A Prefabricated Porous Solid Oxide Matrix, Lingling Zhang, Xue Li, Siwei Wang, Kevin Romito, Kevin Huang
Synthesis Of Mixed Oxide-Ion And Carbonate-Ion Conductors Supported By A Prefabricated Porous Solid Oxide Matrix, Lingling Zhang, Xue Li, Siwei Wang, Kevin Romito, Kevin Huang
Kevin Huang
No abstract provided.
Sr2Fe4/3Mo2/3O6 As Anodes For Solid Oxide Fuel Cells, Guoliang Xiao, Qiang Liu, Xihui Dong, Kevin Huang, Fanglin Chen
Sr2Fe4/3Mo2/3O6 As Anodes For Solid Oxide Fuel Cells, Guoliang Xiao, Qiang Liu, Xihui Dong, Kevin Huang, Fanglin Chen
Kevin Huang
No abstract provided.
Fuel Cells With Doped Lanthanum Gallate Electrolyte, Man Feng, John Goodenough, Kevin Huang, Christopher Milliken
Fuel Cells With Doped Lanthanum Gallate Electrolyte, Man Feng, John Goodenough, Kevin Huang, Christopher Milliken
Kevin Huang
No abstract provided.