2026
article
OpenAlex
Kennedy Agyekum, Zhen Wei Jiang, Bernadette R. Cladek, Yewon Shin et autres
Abstract BaCo0.4Fe0.4Zr0.1Y0.1O3−δ (BCFZY4411) has garnered heightened interest due to its triple-conducting capability, accessible synthesis, and structural stability. The electrocatalytic activity and H+/O2– transport behavior of BaCoxFe0.8–xZr0.1Y0.1O3−δ (BCFZY) can be tailored by fine-tuning the Co/Fe ratio, as recent studies suggest; however, the underlying …
us, ph
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2026
article
OpenAlex
Elizabeth Griffin, Gabriel Trindade dos Santos, Megan Burrill, Kennedy Agyekum et autres
Hydrogen incorporation in solid-state materials remains a critical challenge for the deployment of hydrogen-based energy technologies. Device performance is often limited by the complex kinetics of hydrogen species (H+, H0, H-) within crystalline lattices [1, 2]. Oxyhydride SrTiO3-xHx (STOH), formed when the …
us, ph
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2025
conference-abstract
OpenAlex
Ryan O’Hayre, Yewon Shin, Michael Sanders, Zhen Jiang et autres
Triple-conducting oxides (TCOs) enable simultaneous transport of three charge carriers (h + /O 2- /H + ), making them highly effective as positrode (air/steam) materials in various electrochemical devices, including protonic ceramic and solid-oxide fuel cells and electrolyzers. Among candidate TCOs, BaCo …
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Accès ouvert
2025
conference-abstract
OpenAlex
Kennedy Agyekum, Bernadette R. Cladek, Jue Liu, Katharine Lynn Page
Perovskite oxyhydrides such as ATiO3-xHy (A = Sr, Ca, or Ba) offer flexible sublattices, high H- incorporation (up to 20 % of the anion site), and oxygen site vacancies to promote diffusion of both H- and O2-. Leveraging on both charge and …
us
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2025
article
OpenAlex
Bernadette R. Cladek, Kennedy Agyekum, Yewon Shin, William R. Meier et autres
Due, in part, to its simultaneous transport of protons, electrons, and oxygen ions, $\mathrm{BaC}{\mathrm{o}}_{0.4}\mathrm{F}{\mathrm{e}}_{0.4}\mathrm{Z}{\mathrm{r}}_{0.1}{\mathrm{Y}}_{0.1}{\mathrm{O}}_{3--\ensuremath{\delta}}$ (BCFZY4411) is an archetypal triple-conducting oxide (TCO) and a promising candidate for the air electrode of protonic ceramic electrochemical cells. While the average nuclear structure of BCFZY4411, a …
us
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Accès ouvert
2025
conference-abstract
OpenAlex
Kennedy Agyekum, Bernadette R. Cladek, Yewon Shin, Jue Liu et autres
Triple-conducting perovskite oxides are well-known for their outstanding electrocatalytic activity, thermal and chemical stability, and remarkable simultaneous ionic and electronic conduction rendering them exceptionally valuable for serving as cathodes in solid oxide fuel cells (SOFCs) and protonic ceramic fuel cells (PCFCs/H-SOFcs). The …
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