Format

Send to

Choose Destination
ACS Appl Mater Interfaces. 2015 Dec 23;7(50):27959-67. doi: 10.1021/acsami.5b10300. Epub 2015 Dec 9.

Nanoscale Polysulfides Reactors Achieved by Chemical Au-S Interaction: Improving the Performance of Li-S Batteries on the Electrode Level.

Author information

1
Faculty of Chemistry, National & Local United Engineering Laboratory for Power Batteries, Northeast Normal University , Changchun 130024, China.

Abstract

In this work, the chemical interaction of cathode and lithium polysulfides (LiPSs), which is a more targeted approach for completely preventing the shuttle of LiPSs in lithium-sulfur (Li-S) batteries, has been established on the electrode level. Through simply posttreating the ordinary sulfur cathode in atmospheric environment just for several minutes, the Au nanoparticles (Au NPs) were well-decorated on/in the surface and pores of the electrode composed of commercial acetylene black (CB) and sulfur powder. The Au NPs can covalently stabilize the sulfur/LiPSs, which is advantageous for restricting the shuttle effect. Moreover, the LiPSs reservoirs of Au NPs with high conductivity can significantly control the deposition of the trapped LiPSs, contributing to the uniform distribution of sulfur species upon charging/discharging. The slight modification of the cathode with <3 wt % Au NPs has favorably prospered the cycle capacity and stability of Li-S batteries. Moreover, this cathode exhibited an excellent anti-self-discharge ability. The slight decoration for the ordinary electrode, which can be easily accessed in the industrial process, provides a facile strategy for improving the performance of commercial carbon-based Li-S batteries toward practical application.

KEYWORDS:

Au nanoparticles; Li−S batteries; anti-self-discharge; chemical Au−S interaction; postdecorated cathodes

PMID:
26619747
DOI:
10.1021/acsami.5b10300

Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center