Unraveling Oxygen Reduction Reaction at Solid Oxide Fuel Cell Cathodes
EMSL Project ID
46707
Abstract
We seek to uncover the role of the structure and chemistry of the surfaces of solid oxide fuel cell cathodes in the oxygen reduction reaction. In particular we seek to understand the relationship of the composition and defect chemistry of the surfaces of doped lanthanum manganite and lanthanum iron cobal oxide cathodes to the oxygen reduction process. In the proposed work we fabricate thin films of the aforementioned cathode materials on appropriate solid electrolytes and measure the surface structure and composition using TXRF and XANES spectroscopy. In another experiment we propose to deposit patterned thin film electrodes of the aforementioned cathode materials on suitable electrolyte substrates, and obtain kinetic parameters such as oxygen surface coverage, diffusivities (bulk and surface) and oxygen incorporation reaction rate constants by performing electrochemical impedance spectroscopy on such films. The final goal is to correlate the insights obtained about the surface structure and defect chemistry to the kinetic parameters obtained from modeling impedance spectroscopy data.
Project Details
Project type
Exploratory Research
Start Date
2012-02-14
End Date
2013-02-24
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Archival Journal Papers:
1) L.Miara, S.N.Basu, U.B.Pal, and S.Gopalan, "2D Numerical Model for Identification of Oxygen Reduction Reaction Mechanisms in Patterned Cathodes of La0.6Sr0.4Co0.2Fe0.8O3-δ", J.Electrochem.Soc., 159 (8) F419-F425 (2012)
2) L.Miara, J.N.Davis, S.Basu, U.B.Pal, and S.Gopalan, "Application of a State-Space Model to Patterned Cathodes of (La0.87Ca0.13)0.95MnO3", J.Electrochem.Soc, 158 B1523 (2011)
3) L.F.J.Piper, A.R.H.Preston, S.-W.Cho, A.DeMasi, B.Chen, J.Laverock, K.E.Smith, L.J.Miara, J.N.Davis, S.N.Basu, U.Pal, S.Gopalan, L.Saraf, T.Kaspar, A.Y.Matsuura, P.-A.Glans, and J.-H.Guo, "Soft X-Ray Spectroscopic Study of Dense Strontium-Doped Lanthanum Manganite Cathodes for Solid Oxide Fuel Cell Applications", J.Electrochem.Soc, 158 (2) B99-B105 (2011)
Refereed Conference Proceedings, Extended Abstracts, and Presentations:
1) L.Miara, U. Pal, and S.Gopalan, "Mechanistic Interpretation of the Oxygen Reduction Kinetics of La0.85Ca0.15MnO3 Cathode", ECS Trans. 35 (1), 2119 (2011)
2) L.J.Miara, K.J.Yoon, S.G.Topping, L.Saraf, U.B.Pal, and S.Gopalan, "Polarization Resistance of La0.85Ca0.15MnO3 Cathodes for Solid Oxide Fuel Cells (SOFCs) Measured Using Patterned Electrodes", ECS Transactions, 28 (23) 137-146, (2010)
3) J. N. Davis, L. Miara , L. Saraf, T. C. Kaspar, S. Gopalan, U. B. Pal, J. C. Woicik, K. F. Ludwig, and S.N. Basu, ?Hard X-Ray Fluorescence Measurements of Heteroepitaxial Solid Oxide Fuel Cell Cathode Material?, ECS Transactions, 41 (11) 19-24 (2012)
4) L.Miara, K.J.Yoon, S.G.Topping, L.Saraf, U.Pal, and S.Gopalan, " Polarization Resistance of La0.85Ca0.15MnO3 Cathodes for Solid Oxide Fuel Cells (SOFCs) Measured Using Patterned Electrodes ", ECS Trans. 28 (23), 137 (2010)
5) J. N. Davis, L. Miara , L. Saraf, T. C. Kaspar, S. Gopalan, U. B. Pal, J. C. Woicik, K. F. Ludwig, and S.N. Basu, ?Hard X-Ray Fluorescence Measurements of Heteroepitaxial Solid Oxide Fuel Cell Cathode Material?, Presented at PRiME 2012, The Electrochemical Society, Honolulu, HI, October 9-14 (2012)
6) L.Miara, L.Piper, J.N.Davis, L.Saraf, T.Kaspar, S.Basu, K.E.Smith, U.B.Pal, and S.Gopalan, "Surface Segregation Studies of SOFC Cathodes: Combining Soft X-Rays and Electrochemical Impedance Spectroscopy", MRS Proceedings (2009), 1217 : 1217-Y07-04
7) J.N. Davis, L. Saraf, T.C. Kaspar, S. Gopalan, U.B. Pal, J.C. Woicik, K.F. Ludwig and S.N. Basu, ?Electronic Structure Surface Evolution of Heteroepitaxial Solid Oxide Fuel Cell Cathode Material?, Presented at MRS Fall Meeting, Boston, MA, November 25-30 (2012)
8) Oxygen Reduction Reaction in SOFC Cathodes: An Investigation Using Thin Films L. Miara (Boston University), K. Yoon, L. Saraf (Pacific Northwest National Laboratory), U. Pal, and S. Gopalan (Boston University), Symposium on Solid State Ionics Devices, Las Vegas, NV 2010.
9) J. N. Davis, L. Miara , L. Saraf, T. C. Kaspar, S. Gopalan, U. B. Pal, K. F. Ludwig, and S.N. Basu, ?Direct Measurement of Oxygen Tracer Diffusion of Heteroepitaxial La0.8Sr0.2MnO3 Cathode Material.? Extended Abstract, Proceedings of The Electrochemical Society, Montreal, Canada (2011).
SECA Workshop Posters:
1 ) http://www.netl.doe.gov/publications/proceedings/12/seca/pdf/poster/Gopalan.pdf (2008 SECA meeting)
2) Epitaxial Cathode Thin-films to explore the fundamental science of Cathode interfaces in SOFCs (2009 SECA meeting)
3) Solid Oxide Fuel Cell Cathodes: Unraveling the Relationship between Structure, Surface Chemistry and Oxygen Reduction (2010 SECA meeting)
4) Application of a State-Space Model to Patterned Cathodes of (La0.87Ca0.13)0.95MnO3, L. J. Miara, J. N. Davis, S. N. Basu, U. B. Pal and S.Gopalan (2011 SECA meeting)
5) Unraveling Oxygen Reduction Mechanisms in Solid Oxide Fuel Cell Cathodes, L. J. Miara, J. N. Davis, S. N. Basu, U. B. Pal and S.Gopalan (2012 SECA meeting)
SECA Workshop Presentations:
1) Solid Oxide Fuel Cell Cathodes: Unraveling the Relationship Between Structure, Surface Chemistry and Oxygen Reduction, Srikanth Gopalan, Kevin E. Smith,
Soumendra N. Basu, Karl F. Ludwig, Uday B. Pal (2010)
2) Oxygen Reduction Kinetics in LSM and LSCF, Kinetics of Oxygen Reduction in
LSM and LSCF, Linc Miara, Jacob Davis, U.B.Pal, S.N.Basu, K.Ludwig, and S.Gopalan (2011)
3) A Two Dimension Numerical Model for Identification of Surface Diffusion in Patterned Cathodes of La0.6Sr0.4Co0.2Fe0.8O3-δ, L.Miara, J.N.Davis, U.B.Pal, S.N.Basu, K.Ludwig, and S.Gopalan (2011)
4) Unraveling Oxygen Reduction Mechanisms in Solid Oxide Fuel Cell Cathodes, , L.Miara, J.N.Davis, U.B.Pal, S.N.Basu, K.Ludwig, and S.Gopalan (2012)
5) Yang Yu, Deniz Cetin, Heng Luo, Xi Lin, Karl Ludwig, Uday Pal, Srikanth Gopalan, and Soumendra Basu, ?Surface Segregation and Phase Formation In SOFC Cathode Thin Films?, Jacob Davis, Presented at the 14th Annual SECA Workshop, Pittsburgh, PA, July 23-24 (2013).
Newby Jr. D, J Kuyyalil, J Laverock, KF Ludwig, Y Yu, JN Davis, S Gopalan, UB Pal, SN Basu, and KE Smith. 2015. "Surface Evolution of Lanthanum Strontium Cobalt Ferrite Thin Films at Low Temperatures." , Pacific Northwest National Laboratory, Richland, WA. doi:10.1016/j.tsf.2015.06.037 [Unpublished]