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Advancements in Ion Exchange at Metal-Ceramic Interfaces for High-Temperature Cells

This research, led by PI Frank Ernst from Case Western Reserve University and Co-PI R. Raj from the University of Colorado, investigates asymmetrical electrode configurations for high EMF generation at elevated temperatures, which may lead to novel high-temperature cells. The project explores the impact of metal electrodes and ion interdiffusion on the mechanical strength of interfaces. Education and outreach efforts include graduate students completing significant theses and presenting findings at notable conferences, contributing to advancements in materials science and technology.

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Advancements in Ion Exchange at Metal-Ceramic Interfaces for High-Temperature Cells

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  1. Ion Exchange at Metal-Ceramic InterfacesPI: Frank Ernst, Case Western Reserve UniversityCo-PI: R. Raj, University of ColoradoAward Number: MET DMR-0208008 • Symmetrical electrodes, e.g. Al/Sp/Al do not create an EMF, but an asymmetrical electrode configuration, as shown on the right, creates a large EMF at elevated temperature, raising the specter of a new kind of high-temperature cell. • Metal electrodes made of the cations in the spinel lead to interdiffusion adjacent to the interfaces, which enhances mechanical strength of the interface.

  2. Ion Exchange at Metal-Ceramic InterfacesPI: Frank Ernst, Case Western Reserve UniversityCo-PI: R. Raj, University of ColoradoAward Number: DMR-0208008 Education and Outreach • Yeonseop Yu, graduate student at Case, completed his PhD thesis and defended in 2006. Based on the skills he acquired in this project, he was hired by Samsung R&D, Korea. • Gurpreet Singh, graduate student at UCB, completed his masters thesis. • Myongjai Lee, doctoral student at UCB, was trained in UHV techniques, preparation of thin films, and electrical measurements revealing the mobility of ions in ionic crystals as a function of temperature. Broader Impacts • Frank Ernst, PI, gave an invited presentation on results from this research project in the symposium in honor of David Brandon at the TMS Annual Meeting in San Antonio, 2006. • Frank Ernst, PI, has been invited to present results from this research project at the Materials Science and Technology meeting in Cincinnati, 2006. • Our group has published a paper on results from this project in the Journal of Materials Science (Springer, 2006).

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