Issue 18, 2018

Construction of a stable lithium sulfide membrane to greatly confine polysulfides for high performance lithium–sulfur batteries

Abstract

A stable lithium sulfide membrane is constructed in situ to wrap the mixed sulfur/C material surface of a lithium–sulfur battery (LSB) by delicately tuning the galvanostatic discharge current. The membrane offers unique and selective channels which allow only ions/small sulfides to pass through and confine polysulfide transport, restricting the shuttle effect, and thus providing a large capacity of 685 mA h g−1 at 1C and a long-lasting cycling stability (0.03% capacity decay per cycle). This LSB, which is much superior to the same sulfur-loaded battery without the membrane (0.26% capacity decay per cycle over 207 cycles and 213 mA h g−1 at 1C), is the best among all reported plain carbonaceous host material-based LSBs. The mechanism responsible for such dramatically improved performance is discussed in detail. This work not only offers a facile approach to greatly improve the capacity and stability of LSBs for practical applications but also offers new scientific insights into LSB design.

Graphical abstract: Construction of a stable lithium sulfide membrane to greatly confine polysulfides for high performance lithium–sulfur batteries

Supplementary files

Article information

Article type
Paper
Submitted
04 Jan 2018
Accepted
12 Apr 2018
First published
13 Apr 2018

J. Mater. Chem. A, 2018,6, 8655-8661

Construction of a stable lithium sulfide membrane to greatly confine polysulfides for high performance lithium–sulfur batteries

C. Wu, C. Guo, J. Wu, W. Ai, T. Yu and C. M. Li, J. Mater. Chem. A, 2018, 6, 8655 DOI: 10.1039/C8TA00098K

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