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Meeting Materials Science & Technology 2019
Symposium Advanced Manufacturing, Processing, Characterization and Modeling of Functional Materials
Presentation Title Investigation of the Deposition Mechanism of Nano-CeO2 Catalyst within SOFC Electrodes using Bio-adhesive Catechol Surfactants
Author(s) Ozcan Ozmen, Shiwoo Lee, Gregory Hackett, Harry Abernathy, Edward M. Sabolsky
On-Site Speaker (Planned) Edward M. Sabolsky
Abstract Scope We developed an efficient catechol adhesive-assisted infiltration protocol for decorating solid-oxide fuel cells (SOFC) electrodes with nano- CeO2 catalyst to enhance electrochemical kinetics. Catechol surfactants such as poly-norepinephrine (pNE) are biomolecules that are used as material-independent binding, local chelating and wetting agents due to their multi-functional side groups. These types of surfactants were shown to assist the distinct control of the deposition, dispersion, and particle size of nano-CeO2 catalyst throughout the SOFC electrodes. To investigate the deposition mechanism, we monitored the growth of nano-CeO2 structures associated with the surfactants on YSZ single crystals and porous electrode surfaces, with the variables of coated surfactant morphology, catalyst precursor concentration and deposition time. Deposited nano-CeO2 structures on the ultra-flat YSZ single crystals were characterized using AFM and XPS. The samples were annealed up to 150 h at 750oC to monitor the particle coarsening depending on deposition parameters.
Proceedings Inclusion? Planned: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Direct Energy Deposition Material Process Validation for Remanufacture, Restoration, and Coating for Ground Vehicle Systems
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Effects of High Temperature Oxides on the Thermomechanical Properties of NiTiHf20 Shape Memory Alloy Wires
Effects of Hot-isostatic Pressing on the Microstructural and Magnetic Properties Development in Permalloy-80 Manufactured by Laser Powder Bed Fusion
Effects of Laser-beam Defocus on Microstructural Features of Compositionally Graded WC/Co Composites Additively Manufactured by Multi-laser Metal Deposition
Effects of Ni during Thermo-mechanical Processing in Ni-rich NiTiHf High Temperature Shape Memory Alloy
Epitaxial Growth of a Magnetic Shape-memory Alloy: Laser Metal Deposition of Ni-Mn-Ga
Integrated Heat Transfer and Material Model to Predict Magnetic Field-induced Strain in an Additively Manufactured Magnetic Shape Memory Alloy
Investigating SOFC Electrode Microstructures and Performance Degradation: A High Throughput Integrated Model
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Laser- and Binder-based Additive Manufacturing and Post-processing of Functional Magnetic Materials
Laser Powder Bed Fusion of Ti-rich TiNi Graded Lattice Structures: Process Optimisation, Geometrical Integrity and Mechanical Property
Machine Learning for Solving Metals AM Problems
Magnetic Shielding Promotion in Laser Powder Bed Fusion of NiFeMo Permalloy via Directional Grain Formation and Thermal Post Processing
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Synchrotron Radiation X-ray Diffraction Measurements on Non-metallic Inclusions and their Effect on Fatigue Life in NiTiHf High Temperature Shape Memory Alloys
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