Mixed alkali-ion transport and storage in atomic-disordered honeycomb layered NaKNi₂TeO₆.

ABSTRACT: Honeycomb layered oxides constitute an emerging class of materials that show interesting physicochemical and electrochemical properties. However, the development of these materials is still limited. Here, we report the combined use of alkali atoms (Na and K) to produce a mixed-alkali honeycomb layered oxide material, namely, NaKNi₂TeO₆. Via transmission electron microscopy measurements, we reveal the local atomic structural disorders characterised by aperiodic stacking and incoherency in the alternating arrangement of Na and K atoms. We also investigate the possibility of mixed electrochemical transport and storage of Na⁺ and K⁺ ions in NaKNi₂TeO₆. In particular, we report an average discharge cell voltage of about 4 V and a

SUBMITTER: Masese T 

PROVIDER: S-EPMC8329229 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature