Low‐Polarization Lithium–Oxygen Battery Using [DEME][TFSI] Ionic Liquid Electrolyte1. Issue 1 (23rd November 2017)

• Record Type: Journal Article
• Authors: Ulissi, Ulderico; Elia, Giuseppe Antonio; Jeong, Sangsik; Mueller, Franziska; Reiter, Jakub; Tsiouvaras, Nikolaos; Sun, Yang‐Kook; Scrosati, Bruno; Passerini, Stefano; Hassoun, Jusef
• Is Part Of: ChemSusChem. Volume 11:Issue 1(2018)
• Page Start: 229
• Page End: 236
• Publication Date: 2017-11-23
• Subjects: ionic liquids -- lithium–oxygen batteries -- temperature dependence -- iron-doped zinc oxide -- conversion-alloying anode; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201701696
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: The room‐temperature molten salt mixture of N, N ‐diethyl‐ N‐( 2‐methoxyethyl)‐ N ‐methylammonium bis(trifluoromethanesulfonyl) imide ([DEME][TFSI]) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt is herein reported as electrolyte for application in Li–O2 batteries. The [DEME][TFSI]–LiTFSI solution is studied in terms of ionic conductivity, viscosity, electrochemical stability, and compatibility with lithium metal at 30 °C, 40 °C, and 60 °C. The electrolyte shows suitable properties for application in Li–O2 battery, allowing a reversible, low‐polarization discharge–charge performance with a capacity of about 13 Ah g - 1 carbon in the positive electrode and coulombic efficiency approaching 100 %. The reversibility of the oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) is demonstrated by ex situ XRD and SEM studies. Furthermore, the study of the cycling behavior of the Li–O2 cell using the [DEME][TFSI]‐LiTFSI electrolyte at increasing temperatures (from 30 to 60 °C) evidences enhanced energy efficiency together with morphology changes of the deposited species at the working electrode. In addition, the use of carbon‐coated Zn0.9 Fe0.1 O (TMO‐C) lithium‐conversion anode in an ionic‐liquid‐based Li‐ion/oxygen configuration is preliminarily demonstrated. Abstract : Team IL : An ionic liquid (IL) electrolyte is prepared with N, N ‐diethyl‐ N‐( 2‐methoxyethyl)‐ N ‐methylammonium bis(trifluoromethanesulfonyl) imide ([DEME][TFSI]) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) for efficient use in reversible, low‐polarization, highperformance Li–O2 batteries.