Mechanism and Kinetics of Li2S Precipitation in Lithium-Sulfur Batteries

Frank Y Fan; W Craig Carter; Yet-Ming Chiang

doi:10.1002/adma.201501559

Mechanism and Kinetics of Li2S Precipitation in Lithium-Sulfur Batteries

Adv Mater. 2015 Sep 16;27(35):5203-9. doi: 10.1002/adma.201501559. Epub 2015 Aug 10.

Authors

Frank Y Fan¹, W Craig Carter¹, Yet-Ming Chiang¹

Affiliation

¹ Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA, 02139, USA.

PMID: 26257297
DOI: 10.1002/adma.201501559

Abstract

The kinetics of Li2 S electrodeposition onto carbon in lithium-sulfur batteries are characterized. Electrodeposition is found to be dominated by a 2D nucleation and growth process with rate constants that depend strongly on the electrolyte solvent. Nucleation is found to require a greater overpotential than growth, which results in a morphology that is dependent on the discharge rate.

Keywords: electrodeposition; kinetics; lithium-sulfur batteries; morphology.