Encapsulating highly crystallized mesoporous Fe3O4 in hollow N-doped carbon nanospheres for high-capacity long-life sodium-ion batteries

No Thumbnail Available
File version
Author(s)
Zhao, Y
Wang, F
Wang, C
Wang, S
Wang, C
Zhao, Z
Duan, L
Liu, Y
Wu, Y
Li, W
Zhao, D
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2019
Size
File type(s)
Location
License
Abstract

High capacity transition metal oxides have attracted much attention as potential sodium-ion batteries (SIBs) anodes. However, the fast capacity fading greatly limits their practical applications. In this study, highly crystallized mesoporous Fe3O4 nanoparticles encapsulated in the hollow nitrogen-doped carbon nanospheres (denoted as HCM-Fe3O4@void@N-C) have been synthesized and then explored as anode materials for SIBs. The resultant HCM-Fe3O4@void@N-C nanospheres possess a uniform particle size of ~ 180 nm with highly crystallized mesoporous Fe3O4 cores (~ 100 nm in diameter), a large surface area of ~ 250 m2 g−1 and a nitrogen-doped carbon shell (~ 7.6 wt%). Notably, a high discharge capacity of 372 mA h g−1 is obtained after the first five cycles at 160 mA g−1, which can gradually increase and be maintained at an ultrahigh specific capacity of 522 mA h g−1 even after 800 cycles. Besides, remarkable rate performance with a capacity of 196 mA h g−1 at a current density of 1200 mA g–1 and a high Coulombic efficiency (~ 100%) are obtained. Such good performance can be attributed to the unique yolk-shell nanostructure with a high crystallized mesoporous Fe3O4 core, a high conductive N-doped carbon shell, and a suitable void space, paving a new way to design and synthesize high-performance anode materials for SIBs.

Journal Title

Nano Energy

Conference Title
Book Title
Edition
Volume

56

Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Macromolecular and materials chemistry

Materials engineering

Nanotechnology

Persistent link to this record
Citation

Zhao, Y; Wang, F; Wang, C; Wang, S; Wang, C; Zhao, Z; Duan, L; Liu, Y; Wu, Y; Li, W; Zhao, D, Encapsulating highly crystallized mesoporous Fe 3 O 4 in hollow N-doped carbon nanospheres for high-capacity long-life sodium-ion batteries, Nano Energy, 2019, 56, pp. 426-433

Collections