On the conduction pathway for protons in nanocrystalline yttria-stabilized zirconia
S Kim, HJ Avila-Paredes, S Wang, CT Chen… - Physical Chemistry …, 2009 - pubs.rsc.org
Physical Chemistry Chemical Physics, 2009•pubs.rsc.org
In this communication we elucidate a microstructural picture of proton conduction in nano-
crystalline yttria-stabilized zirconia at low temperatures (Kim et al. Adv. Mater., 2008, 20,
556). Based on careful analysis of electrical impedance spectra obtained from samples with
grain sizes of∼ 13 and∼ 100 nm under both wet and dry atmospheres over a wide range of
temperatures (room temperature–500° C), we were able to identify the pathway for proton
conduction in this material. It was found that the grain boundaries in nano-crystalline yttria …
crystalline yttria-stabilized zirconia at low temperatures (Kim et al. Adv. Mater., 2008, 20,
556). Based on careful analysis of electrical impedance spectra obtained from samples with
grain sizes of∼ 13 and∼ 100 nm under both wet and dry atmospheres over a wide range of
temperatures (room temperature–500° C), we were able to identify the pathway for proton
conduction in this material. It was found that the grain boundaries in nano-crystalline yttria …
In this communication we elucidate a microstructural picture of proton conduction in nano-crystalline yttria-stabilized zirconia at low temperatures (Kim et al. Adv. Mater., 2008, 20, 556). Based on careful analysis of electrical impedance spectra obtained from samples with grain sizes of ∼13 and ∼100 nm under both wet and dry atmospheres over a wide range of temperatures (room temperature–500 °C), we were able to identify the pathway for proton conduction in this material. It was found that the grain boundaries in nano-crystalline yttria-stabilized zirconia are highly selective for ion transport, being conductive for proton transport but resistive for oxygen-ion transport.
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