Intercalant-induced V t_2g orbital occupation in vanadium oxide cathode toward fast-charging aqueous zinc-ion batteries.

ABSTRACT: Intercalation-type layered oxides have been widely explored as cathode materials for aqueous zinc-ion batteries (ZIBs). Although high-rate capability has been achieved based on the pillar effect of various intercalants for widening interlayer space, an in-depth understanding of atomic orbital variations induced by intercalants is still unknown. Herein, we design an NH₄⁺-intercalated vanadium oxide (NH₄⁺-V₂O₅) for high-rate ZIBs, together with deeply investigating the role of the intercalant in terms of atomic orbital. Besides extended layer spacing, our X-ray spectroscopies reveal that the insertion of NH₄⁺ could promote electron transition to 3d_xy state of V t₂

SUBMITTER: Wang Y 

PROVIDER: S-EPMC10068788 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature