ISIS Neutron and Muon Source Data Journal

Ionic diffusion via oxygen vacancies and interstitial positions in layered Ruddlesden-Popper nickelates: A high-temperature study

Abstract: Rare-earth nickelates Ln2NiO4+? (Ln = La, Pr, Nd) with perovskite-related layered Ruddlesden-Popper (RP) structure are promising mixed ionic-electronic conductors (MIEC) for high-temperature electrochemical applications such as dense MIEC membranes for oxygen separation and oxygen electrodes for solid oxide fuel/electrolysis cells. The objective of the proposed study is to provide an insight on the changes in oxygen diffusion mechanism on a gradual transition from oxygen excess to oxygen deficiency in the RP structure occurring on substitution of lanthanum by strontium in La2-xSrxNiO4+?. To this end, the neutron diffraction patterns of three compositions (x = 0, 1.0 and 1.6) will be collected at room temperature, 700°C and 900°C and analyzed by a combination of Rietveld analysis and maximum-entropy method to reveal the dominating pathway of oxygen-ion diffusion.

Principal Investigator: Dr Aleksey Yaremchenko
Local Contact: Dr Dmitry Khalyavin

DOI: 10.5286/ISIS.E.RB2220545

ISIS Experiment Number: RB2220545

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Aleksey Yaremchenko et al; (2023): Ionic diffusion via oxygen vacancies and interstitial positions in layered Ruddlesden-Popper nickelates: A high-temperature study, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2220545

Data is released under the CC-BY-4.0 license.