Relationship between local structure and oxide ionic diffusion of Nd2NiO4+δ with K2NiF4 structure

Toshiaki Ina, Yuki Orikasa, Titus Masese, Takayuki Nakao, Atsushi Mineshige, Koji Amezawa, Hajime Tanida, Tomoya Uruga, Yoshiharu Uchimoto

    Research output: Contribution to journalArticle

    Abstract

    The relationship between the local structure and oxide ionic conduction of Nd2NiO4+δ possessing the K2NiF4 structure was investigated. Various oxygen nonstoichiometry samples of Nd2NiO4+δ prepared with different annealing oxygen partial pressures were examined. The local structure related to oxide ionic conduction was determined by the Nd K-edge extended X-ray absorption fine structure. The oxide ionic conductivity and surface exchange coefficient were estimated using electronic conductivity relaxation methods. The activation energy for the oxide ionic conductivity was found to have a direct correlation to the surface exchange coefficient. The bottleneck size for oxide ion conduction was strongly correlated to the oxide ionic conduction of interstitial oxygen and the oxygen surface exchange rate.

    Original languageEnglish
    Pages (from-to)875-879
    Number of pages5
    JournalElectrochemistry
    Volume82
    Issue number10
    DOIs
    Publication statusPublished - 2014 Jan 1

    Keywords

    • Extended x-ray absorption fine structure
    • Local structure
    • NdNiO
    • Oxide ion conduction

    ASJC Scopus subject areas

    • Electrochemistry

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    Ina, T., Orikasa, Y., Masese, T., Nakao, T., Mineshige, A., Amezawa, K., Tanida, H., Uruga, T., & Uchimoto, Y. (2014). Relationship between local structure and oxide ionic diffusion of Nd2NiO4+δ with K2NiF4 structure. Electrochemistry, 82(10), 875-879. https://doi.org/10.5796/electrochemistry.82.875