Correlation between Structural and Transport Properties of Ca-Doped La Nickelates and Their Electrochemical Performance
نویسندگان
چکیده
This work presents the results from a study of structure and transport properties Ca-doped La2NiO4+?. La2?xCaxNiO4+? (x = 0–0.4) materials that were synthesized via combustion organic-nitrate precursors characterized by X-ray diffraction (XRD), in situ XRD using synchrotron radiation, thermogravimetric analysis (TGA) isotope exchange oxygen with C18O2. The was defined as orthorhombic (Fmmm) for x 0 tetragonal (I4/mmm) 0.1–0.4. Changes occurred unit cell parameters volume temperature changed during heating shown to be caused excess loss. Typical Ruddlesden–Popper phases, mobility surface reactivity decreased Ca content increased due reduction over-stoichiometric exception 0.1. composition demonstrated its superior compared La2NiO4+? enhanced structural features. Electrochemical data obtained showed relatively low polarization resistance electrodes content, which correlates well properties.
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ژورنال
عنوان ژورنال: Crystals
سال: 2021
ISSN: ['2073-4352']
DOI: https://doi.org/10.3390/cryst11030297