High-Capacity Interstitial Mn-Incorporated MnxFe3-xO4/Graphene Nanocomposite for Sodium-Ion Battery Anodes

Haixia Ren, Ying Bai*, Xinran Wang, Qiao Ni, Zhaohua Wang, Yu Li, Guanghai Chen, Feng Wu, Huajie Xu, Chuan Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Sodium-ion batteries (SIBs) have attracted wide attention because of their prospects for grid-scale electrical regulation and cost effectiveness of sodium. In this regard, iron oxides (FeOx) are considered as one of the most promising anode candidates due to their high theoretical capacity and low cost. Unfortunately, the utilization of FeOx anodes suffers from sluggish reaction kinetics and significant lattice variation, causing insufficient rate performance and fast capacity degradation during the sodiation/desodiation process. In this study, Mn ions are incorporated through interstitial sites into a Fe3O4 lattice to form the Mn-incorporated Fe3O4/graphene (M-Fe3O4/G) composites through a facile hydrothermal method. Confirmed by XRD Rietveld refinement and the first-principles calculation, Mn occupation into the body structure can effectively condense the electron density around the Fermi level and thus contributes to the increased electrical conductivity and improved electrochemical properties. Accordingly, the M0.1Fe2.9O4/G composite demonstrates a high reversible capacity of 439.8 mA h g-1 at a current density of 100 mA g-1 over 200 cycles. Even at a high current density of 1 A g-1, the M-Fe3O4/G composites remain stable for over 1200 cycles, delivering a capacity of 210 mA h g-1. Coupled with a Na3V2(PO4)3-type cathode, the Mn-incorporated Fe3O4/G composites demonstrate good suitability in full SIBs (161.2 mA h g-1 at the current density of 1 A g-1 after 100 cycles). The regulation of Mn ions in the Fe3O4 lattice provides insights into the optimization of metal oxide anode candidates for their application in SIBs.

Original languageEnglish
Pages (from-to)37812-37821
Number of pages10
JournalACS applied materials & interfaces
Volume11
Issue number41
DOIs
Publication statusPublished - 16 Oct 2019

Keywords

  • full cell
  • graphene
  • high capacity
  • interstitial incorporation
  • iron oxides
  • sodium-ion batteries

Fingerprint

Dive into the research topics of 'High-Capacity Interstitial Mn-Incorporated MnxFe3-xO4/Graphene Nanocomposite for Sodium-Ion Battery Anodes'. Together they form a unique fingerprint.

Cite this