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Meeting MS&T25: Materials Science & Technology
Symposium ACerS Robert B. Sosman Award Symposium
Presentation Title Electro-Chemo-Mechanics of (Ce,Pr)O2-ä Nanostructures
Author(s) Nicola H. Perry
On-Site Speaker (Planned) Nicola H. Perry
Abstract Scope (Ce,Pr)O2-ä (PCO) is a mixed ionic/electronic conductor of interest for high-temperature electrodes. For efficient performance, electrode materials are often nanostructured, but the relationship between nanostructuring and electro-chemo-mechanical coupling has not been widely studied. In this talk I will describe investigations into redox chemical expansivity, transport behavior, and catalyst ex-solution on PCO nanoparticles, nanocrystalline ceramics, and nanostructured thin films. TGA, simultaneous dilatometry with EIS, atomistic simulations, and STEM-EELS reveal how modified interface defect chemistry gives rise to lower chemical strains, more ionic behavior, and non-linear strain-stoichiometry relationships at the nanoscale. Nanostructured Ni-PCO films enable a combined elastic and electrochemical driving force for facile catalyst ex-solution under mild conditions, observed with synchrotron NAP-XPS, AFM, and EIS. Ex-solution of Ni lowers polarization resistance and increases conductivity under fuel electrode conditions, attributed to the higher oxygen vacancy and electron concentrations. Implications for electrode design will be addressed. Funding: DOE grant DE-SC0023438 (MUSIC EFRC)

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Deep Dive into the Structure, Transport, and Surface Exchange Kinetics of the BaCoxFe0.8-xZr0.1Y0.1O3-d (BCFZY, 0.1≤x≤0.7) Triple-Conducting Oxide System
Atomic and Dynamic Insights into Transport, Mechanics and Failure in Energy Electroceramics
Earth as a Factory: Interfacial and Subsurface Electron Transfer for Clean Fuel Generation
Electro-Chemo-Mechanics of (Ce,Pr)O2-ä Nanostructures
Guiding Mixed Anion Material Synthesis with a Computational-Experimental Feedback Loop
Oxygen Transport in Lithium Layered Oxides

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