Issue 2, 2016

A graphene-like metallic cathode host for long-life and high-loading lithium–sulfur batteries

Abstract

Development of Li–S batteries with long cycle life and high practical capacity is central to enable low-cost, large-scale energy storage. Sulfiphilic cathode materials with strong affinity for lithium (poly)sulfides are a promising new group of candidates to control dissolution/precipitation reactions in the cell, where the improvement of conductivity and the areal sulfur loading is an important objective. Here we report a metallic Co9S8 material with an interconnected graphene-like nano-architecture that realizes this aim. First-principles calculations coupled with spectroscopic evidence demonstrate the synergistic strong dual-interactions of polysulfides with the host. The three dimensional interconnected structure with hierarchical porosity not only manifests up to a factor of 10 increase of cycling stability (fade < 0.045% per cycle over 1500 cycles at C/2) compared to standard porous carbons but also, more importantly, enables a high-loading sulfur electrode with up to 75 wt% sulfur, and up to 4.5 mg cm−2 areal sulfur loading.

Graphical abstract: A graphene-like metallic cathode host for long-life and high-loading lithium–sulfur batteries

Supplementary files

Article information

Article type
Communication
Submitted
18 अक्तूबर 2015
Accepted
07 दिसम्बर 2015
First published
09 दिसम्बर 2015

Mater. Horiz., 2016,3, 130-136

A graphene-like metallic cathode host for long-life and high-loading lithium–sulfur batteries

Q. Pang, D. Kundu and L. F. Nazar, Mater. Horiz., 2016, 3, 130 DOI: 10.1039/C5MH00246J

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