Atomic-scale unveiling of multiphase evolution during hydrated Zn-ion insertion in vanadium oxide.

ABSTRACT: An initial crystalline phase can transform into another phases as cations are electrochemically inserted into its lattice. Precise identification of phase evolution at an atomic level during transformation is thus the very first step to comprehensively understand the cation insertion behavior and subsequently achieve much higher storage capacity in rechargeable cells, although it is sometimes challenging. By intensively using atomic-column-resolved scanning transmission electron microscopy, we directly visualize the simultaneous intercalation of both H₂O and Zn during discharge of Zn ions into a V₂O₅ cathode with an aqueous electrolyte. In particular, when further Zn insertion proceeds, multiple intermediate phases, which are not identified by a macroscopic

SUBMITTER: Byeon P 

PROVIDER: S-EPMC8322084 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature