Paving the Way for Using Li2S Batteries. Issue 9 (8th July 2014)

• Record Type: Journal Article
• Authors: Xu, Rui; Zhang, Xiaofeng; Yu, Cun; Ren, Yang; Li, James C. M.; Belharouak, Ilias
• Is Part Of: ChemSusChem. Volume 7:Issue 9(2014:Sep.)
• Page Start: 2457
• Page End: 2460
• Publication Date: 2014-07-08
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201402177
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>In this work, a novel lithium–sulfur battery was developed comprising Li₂S as the cathode, lithium metal as the anode and polysulfide‐based solution as the electrolyte. The electrochemical performances of these Li₂S‐based cells strongly depended upon the nature of the electrolytes. In the presence of the conventional electrolyte that consisted of lithium bis(trifluoromethanesulfonyl)‐imide (LiTFSI) salt dissolved in a solvent combination of dimethoxyethane (DME)/1, 3‐dioxolane (DOL), the Li/Li₂S cells showed sluggish kinetics, which translated into poor cycling and capacity retention. However, when using small amounts of polysulfides in the electrolyte along with a shuttle inhibitor the Li₂S cathode was efficiently activated in the cell with the generation of over 1000 mAh g⁻¹ capacity and good cycle life.</p> </abstract>