Controllable synthesis of a Na-enriched Na₄V₂(PO₄)₃ cathode for high-energy sodium-ion batteries: a redox-potential-matched chemical sodiation approach.

ABSTRACT: Exploring a sodium-enriched cathode (i.e. Na₄V₂(PO₄)₃, which differs from its traditional stoichiometric counterpart Na₃V₂(PO₄)₃ that can provide extra endogenous sodium reserves to mitigate the irreversible capacity loss of the anode material (i.e. hard carbon), is an intriguing presodiation method for the development of high energy sodium-ion batteries. To meet this challenge, herein, we first propose a redox-potential-matched chemical sodiation approach, utilizing phenazine-sodium (PNZ-Na) as the optimal reagent to sodiate the Na₃V₂(PO₄)₃ precursor into Na-enriched Na₄V₂(PO₄)₃. The spontaneous sodiat

SUBMITTER: Xu M 

PROVIDER: S-EPMC10646896 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature