Issue 2, 2018

Auto-generated iron chalcogenide microcapsules ensure high-rate and high-capacity sodium-ion storage

Abstract

Sodium-ion batteries (SIBs) are regarded as promising alternative energy-storage devices to lithium-ion batteries (LIBs). However, the trade-off of between energy density and power density under high mass-loading conditions restricts the application of SIBs. Herein, we synthesized an FeSe@FeS material via a facile solid-state reaction. A microcapsule architecture was spontaneously achieved in this process, which facilitated electron transport and provided stable diffusion paths for Na ions. The FeSe@FeS material exhibits a high capacity retention (485 mA h g−1 at 3 A g−1 after 1400 cycles) and superior rate capability (230 mA h g−1 at 10 A g−1 after 1600 cycles) in the half-cell test. Furthermore, superior cycling stability is achieved in the full-cell test. The high mass-loaded FeSe@FeS electrodes (8 mg cm−2) realize a high areal capacity retention of 2.8 mA h cm−2 and high thermal stability.

Graphical abstract: Auto-generated iron chalcogenide microcapsules ensure high-rate and high-capacity sodium-ion storage

Supplementary files

Article information

Article type
Paper
Submitted
06 Nov 2017
Accepted
06 Dec 2017
First published
06 Dec 2017

Nanoscale, 2018,10, 800-806

Auto-generated iron chalcogenide microcapsules ensure high-rate and high-capacity sodium-ion storage

X. Wang, Z. Yang, C. Wang, L. Ma, C. Zhao, J. Chen, X. Zhang and M. Xue, Nanoscale, 2018, 10, 800 DOI: 10.1039/C7NR08255J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements