Affordable Access

deepdyve-link deepdyve-link
Publisher Website

Sulphur-impregnated flow cathode to enable high-energy-density lithium flow batteries.

Authors
  • Chen, Hongning
  • Zou, Qingli
  • Liang, Zhuojian
  • Liu, Hao
  • Li, Quan
  • Lu, Yi-Chun
Type
Published Article
Journal
Nature Communications
Publisher
Springer Nature
Publication Date
Jan 01, 2015
Volume
6
Pages
5877–5877
Identifiers
DOI: 10.1038/ncomms6877
PMID: 25565112
Source
Medline
License
Unknown

Abstract

Redox flow batteries are promising technologies for large-scale electricity storage, but have been suffering from low energy density and low volumetric capacity. Here we report a flow cathode that exploits highly concentrated sulphur-impregnated carbon composite, to achieve a catholyte volumetric capacity 294 Ah l(-1) with long cycle life (>100 cycles), high columbic efficiency (>90%, 100 cycles) and high energy efficiency (>80%, 100 cycles). The demonstrated catholyte volumetric capacity is five times higher than the all-vanadium flow batteries (60 Ah l(-1)) and 3-6 times higher than the demonstrated lithium-polysulphide approaches (50-117 Ah l(-1)). Pseudo-in situ impedance and microscopy characterizations reveal superior electrochemical and morphological reversibility of the sulphur redox reactions. Our approach of exploiting sulphur-impregnated carbon composite in the flow cathode creates effective interfaces between the insulating sulphur and conductive carbon-percolating network and offers a promising direction to develop high-energy-density flow batteries.

Report this publication

Statistics

Seen <100 times