Electrochemical Performance of Na₃V₂(PO₄)₂F₃ Electrode Material in a Symmetric Cell.

ABSTRACT: A NASICON-based Na₃V₂(PO₄)₂F₃ (NVPF) cathode material is reported herein as a potential symmetric cell electrode material. The symmetric cell was active from 0 to 3.5 V and showed a capacity of 85 mAh/g at 0.1 C. With cycling, the NVPF symmetric cell showed a very long and stable cycle life, having a capacity retention of 61% after 1000 cycles at 1 C. The diffusion coefficient calculated from cyclic voltammetry (CV) and the galvanostatic intermittent titration technique (GITT) was found to be ~10^-9-10^-11, suggesting a smooth diffusion of Na⁺ in the NVPF symmetric cell. The electrochemical impedance spectroscopy (EIS) carried out during cycling showed increases in bulk resistance, solid electrolyte inter

SUBMITTER: James Abraham J 

PROVIDER: S-EPMC8584735 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature