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Journal article
Exploring Fast Room Temperature Oxygen Diffusion in Pr2NiO4+delta Stand-Alone Single-Crystalline Electrodes
Chemistry of materials, v 34(1), pp 414-421
11 Jan 2022
Abstract
Performant solid-state oxygen ion conductors are of utmost importance for current and future energy applications. A significant enhancement of oxygen mobility has been recently established in the intermediate temperature range from 500 to 700 degrees C, but materials showing notable room temperature oxygen diffusion are still rare. While devices for energy storage or transformation generally employ polycrystalline electrodes, we report here on the electrochemical oxygen permeation capacity of single-crystalline Pr2NiO4+delta electrodes, showing remarkably high oxygen diffusion under ambient conditions, with 60 mu m thickness. The electrochemically performed oxygen reduction was followed up by in situ single-crystal synchrotron diffraction, revealing oxygen mass transport corresponding to a chemical diffusion coefficient of D* = 6.3 x 10(-11) cm(2) s(-1). Rapid oxygen diffusion becomes possible due to the predominant absence of grain boundaries, as revealed from the evolution of the individual twin domains. For the first time, the formation of anti-phase domains, organized on a length scale of 7 nm, could be evidenced during a chemical reaction, indicated by sharp satellite reflections of the second order. Our results demonstrate the yet unexplored potential of single crystals as stand-alone electrodes for high-throughput solid oxygen ion conductors under already ambient conditions.
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8 citations in Scopus
Details
- Title
- Exploring Fast Room Temperature Oxygen Diffusion in Pr2NiO4+delta Stand-Alone Single-Crystalline Electrodes
- Creators
- Avishek Maity - Université de MontpellierRajesh Dutta - Université de MontpellierOles Sendtskyi - Université de MontpellierMonica Ceretti - École Nationale Supérieure de Chimie de MontpellierAngelique Lebranchu - Université de MontpellierDmitry Chernyshov - European Synchrotron Radiation FacilityAlexei Bosak - European Synchrotron Radiation FacilityWerner Paulus - Centre National de la Recherche Scientifique
- Publication Details
- Chemistry of materials, v 34(1), pp 414-421
- Publisher
- Amer Chemical Soc
- Number of pages
- 8
- Grant note
- ANR-14-CE36-0006-01 / French National Research Agency (ANR) French ministry of Research and Education (MENRT)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000772035800040
- Scopus ID
- 2-s2.0-85121983402
- Other Identifier
- 991022004771204721