Lithium iodide as a promising electrolyte additive for lithium-sulfur batteries: mechanisms of performance enhancement

Feixiang Wu; Jung Tae Lee; Naoki Nitta; Hyea Kim; Oleg Borodin; Gleb Yushin

doi:10.1002/adma.201404194

Lithium iodide as a promising electrolyte additive for lithium-sulfur batteries: mechanisms of performance enhancement

Adv Mater. 2015 Jan 7;27(1):101-8. doi: 10.1002/adma.201404194. Epub 2014 Nov 3.

Authors

Feixiang Wu¹, Jung Tae Lee, Naoki Nitta, Hyea Kim, Oleg Borodin, Gleb Yushin

Affiliation

¹ School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA; School of Metallurgy and Environment, Central South University, Changsha, 410083, P.R. China.

PMID: 25367318
DOI: 10.1002/adma.201404194

Abstract

Lithium Iodide (LiI) is reported as a promising electrolyte additive for lithium-sulfur batteries. It induces formation of Li-ion-permeable protective coatings on both positive and negative electrodes, which prevent the dissolution of polysulfides on the cathode and reduction of polysulfides on the anode. In addition to enhancing the cell cycle stability, LiI addition also decreases the cell overpotential and voltage hysteresis.

Keywords: Li/S; cathode; lithium iodide; lithium sulfide; sulfur.