Insight into the Structural Disorder in Honeycomb-Ordered Sodium-Layered Oxide Cathodes.

ABSTRACT: Honeycomb-layered phases Na₃M₂XO₆ (M = Ni, Cu, Co; X = Sb, Bietc.) have been intensively pursued as high-voltage and high-rate capability cathode materials for Na-ion batteries (NIBs), but the crystal structure is not well elucidated. Herein, structural analysis was conducted on pristine Na₃Ni₂SbO₆ material using electron microscopy and associated spectroscopies to reveal its crystallographic features. Experimental observations along multiple zone axes indicate that structural disorder is intrinsic in the pristine Na₃Ni₂SbO₆, characteristic of randomly stacked layers with three variants of monoclinic structure. Stacking disorder is demonstrated by the non-vertical relationship of adjacent Ni<

SUBMITTER: Xiao L 

PROVIDER: S-EPMC7038003 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature