Realizing a High-Performance Na-Storage Cathode by Tailoring Ultrasmall Na₂FePO₄F Nanoparticles with Facilitated Reaction Kinetics.

ABSTRACT: In this paper, the synthesis of ultrasmall Na₂FePO₄F nanoparticles (≈3.8 nm) delicately embedded in porous N-doped carbon nanofibers (denoted as Na₂FePO₄F@C) by electrospinning is reported. The as-prepared Na₂FePO₄F@C fiber film tightly adherent on aluminum foil features great flexibility and is directly used as binder-free cathode for sodium-ion batteries, exhibiting admirable electrochemical performance with high reversible capacity (117.8 mAh g^-1 at 0.1 C), outstanding rate capability (46.4 mAh g^-1 at 20 C), and unprecedentedly high cyclic stability (85% capacity retention after 2000 cycles). The reaction kinetics and mechanism are explored by a combination study of cyclic voltammetry, ex situ struct

SUBMITTER: Wang F 

PROVIDER: S-EPMC6662290 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature