Visualization by Neutron Diffraction of 2D Oxygen Diffusion in the Sr0.7Ho0.3CoO3−δ Cathode for Solid-Oxide Fuel Cells

2014 ◽  
Vol 6 (12) ◽  
pp. 9194-9200 ◽  
Author(s):  
V. Cascos ◽  
R. Martínez-Coronado ◽  
J. A. Alonso ◽  
M. T. Fernández-Díaz
Keyword(s):  
Fuel Cells ◽  
Neutron Diffraction ◽  
Solid Oxide Fuel Cells ◽  
Oxygen Diffusion ◽  
Solid Oxide ◽  
Oxide Fuel

OPTIMIZING OXYGEN DIFFUSION IN CATHODE MATERIALS FOR SOLID OXIDE FUEL CELLS

2012 ◽  
Vol 26 (30) ◽  
pp. 1250196 ◽  
Author(s):  
A. CHRONEOS ◽  
D. PARFITT ◽  
R. V. VOVK ◽  
I. L. GOULATIS
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Oxygen Diffusion ◽  
Solid Oxide ◽  
Atomistic Simulations ◽  
Oxygen Stoichiometry ◽  
Layered Perovskite ◽  
Oxide Fuel ◽  
Cation Disorder ◽  
Experimental And Theoretical Studies

Recent investigations have revealed that the Ruddlesden–Popper series ( A n+1 B n O 3n+1) and the layered perovskite Ln BaCo 2 O 5+δ (Ln = rare-earth cations) are promising as cathodes for intermediate temperature solid oxide fuel cells. For these to be economical the oxygen diffusion must be maximized. Based on atomistic simulations, we propose strategies for optimizing oxygen diffusion in these materials by modifying the oxygen stoichiometry, the composition and cation disorder. The present investigation is focused on La 2 CoO 4+δ and GdBaCo 2 O 5+δ and the results are discussed in view of recent experimental and theoretical studies.

Evaluation of Sr2CoMoO6−δ as anode material in solid-oxide fuel cells: A neutron diffraction study

2011 ◽  
Vol 109 (3) ◽  
pp. 034907 ◽  
Author(s):  
A. Aguadero ◽  
J. A. Alonso ◽  
R. Martínez-Coronado ◽  
M. J. Martínez-Lope ◽  
M. T. Fernández-Díaz
Keyword(s):  
Fuel Cells ◽  
Neutron Diffraction ◽  
Solid Oxide Fuel Cells ◽  
Diffraction Study ◽  
Anode Material ◽  
Neutron Diffraction Study ◽  
Solid Oxide ◽  
Oxide Fuel

Diffusion of Oxygen at Ceramic Interfaces for High-Temperature Solid Oxide Fuel Cells

2005 ◽  
Vol 242-244 ◽  
pp. 129-142 ◽  
Author(s):  
Teruhisa Horita ◽  
Haruo Kishimoto ◽  
Katsuhiko Yamaji ◽  
Natsuko Sakai ◽  
Yue Ping Xiong ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Oxygen Diffusion ◽  
Secondary Ion Mass Spectrometry ◽  
Ceramic Materials ◽  
Electrochemical Process ◽  
Solid Oxide ◽  
Oxide Ceramic ◽  
Oxide Fuel ◽  
Oxide Scales

Oxygen diffusion was measured at oxygen/cathode/electrolyte interfaces and at oxide scales/alloy interconnects in Solid Oxide Fuel Cells (SOFCs). A stable isotope oxygen exchange technique (16O/18O exchange) was adopted to label the diffusion profiles in the oxides, and secondary ion mass spectrometry (SIMS) depth profiles were examined to determine the diffusion coefficients in the oxide ceramic materials. Diffusivity of oxygen in LaMnO3 cathode was measured under polarized condition (that is, considering the electrochemical process and diffusion). Also, oxygen diffusion in the oxide scales formed on the alloy was measured to clarify the formation mechanism of oxide scale.

Effect of Oxygen Diffusion Constraints on the Performance of Planar Solid Oxide Fuel Cells for Variable Oxygen Concentration

2020 ◽  
Vol 59 (42) ◽  
pp. 18844-18856
Author(s):  
Nayan Biswas ◽  
Deepra Bhattacharya ◽  
Manoj Kumar ◽  
Jayanta Mukhopadhyay ◽  
Rajendra Nath Basu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Oxygen Concentration ◽  
Oxygen Diffusion ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Effect Of Oxygen

Structural and Physical Property Trends of the Hyperstoichiometric Series, La2Ni(1-x)CoxO4+δ

2002 ◽  
Vol 755 ◽  
Author(s):  
G. Amow ◽  
P. S. Whitfield ◽  
J. Davidson ◽  
R. P. Hammond ◽  
C. Munnings ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Neutron Diffraction ◽  
Solid Oxide Fuel Cells ◽  
Physical Properties ◽  
Physical Property ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Structural Trend ◽  
X Ray ◽  
Potential Use

ABSTRACTMembers of the Ruddlesden-Popper system, La2Ni(1-x)CoxO4+δ (0.00 ≤ × ≤ 1.00), were synthesized and studied for their potential use as cathodes for solid-oxide fuel cells. An unusual structural trend has been noted across the series, which appears to correlate with the oxygen-hyperstoichiometry observed. Details of the structural variance by x-ray and neutron diffraction, as well as selected physical properties for this system will be presented.

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