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Spatiotemporal Resolution of Phase Formation in Thick Porous Sodium Vanadium Oxide (NaV₃O₈) Electrodes via Operando Energy Dispersive X-ray Diffraction.

ABSTRACT: Herein, zinc vanadium oxide (ZVO) and zinc hydroxy-sulfate (ZHS) formation as discharge products in sodium vanadium oxide (NVO) cathode materials of two distinct morphologies, NVO(300) and NVO(500), is studied with ex situ and operando X-ray diffraction methods. ZHS formation upon discharge is shown to be favored at higher current densities and reversible upon charge, while ZVO formation is found to be favored at lower current densities but persists throughout cycling. Operando synchrotron-based energy dispersive X-ray diffraction (EDXRD) reveals reversible expansion of the NVO lattice due to Zn²⁺ during discharge, spontaneous ZVO formation following cell assembly, and ZHS formation concomitant with H⁺ insertion at potentials less than ∼0.8 V vs Z

SUBMITTER: Singh G

PROVIDER: S-EPMC9987351 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature

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Spatiotemporal Resolution of Phase Formation in Thick Porous Sodium Vanadium Oxide (NaV₃O₈) Electrodes via Operando Energy Dispersive X-ray Diffraction.

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Spatiotemporal Resolution of Phase Formation in Thick Porous Sodium Vanadium Oxide (NaV3O8) Electrodes via Operando Energy Dispersive X-ray Diffraction.

OmicsDI is part of the ELIXIR infrastructure

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Spatiotemporal Resolution of Phase Formation in Thick Porous Sodium Vanadium Oxide (NaV₃O₈) Electrodes via Operando Energy Dispersive X-ray Diffraction.