Impacts of distorted local chemical coordination on electrochemical performance in hydrated vanadium pentoxide.

ABSTRACT: Modulating and elevating the operating voltage of a given cathode is a significant challenge to enhance the energy density of secondary batteries without sacrificing power output. The chemical coordination strongly influences the energy levels of d-orbitals of redox cations in cathode materials, which tie to their operating voltage. In contrast to concentrated studies on enhancing the specific capacity, in this study, we choose bi-layered hydrated vanadium pentoxide as the model to modulate the d-orbital energy levels through local chemical coordination manipulation, achieving a higher operating voltage in rechargeable aqueous zinc ion batteries. Here we show that, by employing X-ray absorption spectroscopy (XAS) and pair distribution function (PDF) techniques, we can analyze the distortio

SUBMITTER: Niu H 

PROVIDER: S-EPMC11527994 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature