Importance of Reaction Kinetics and Oxygen Crossover in aprotic Li–O2 Batteries Based on a Dimethyl Sulfoxide Electrolyte. Issue 18 (6th August 2015)

• Record Type: Journal Article
• Authors: Marinaro, M.; Balasubramanian, P.; Gucciardi, E.; Theil, S.; Jörissen, L.; Wohlfahrt‐Mehrens, M.
• Is Part Of: ChemSusChem. Volume 8:Issue 18(2015:Sep.)
• Page Start: 3139
• Page End: 3145
• Publication Date: 2015-08-06
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201500600
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Although still in their embryonic state, aprotic rechargeable Li‐O₂ batteries have, theoretically, the capabilities of reaching higher specific energy densities than Li‐ion batteries. There are, however, significant drawbacks that must be addressed to allow stable electrochemical performance; these will ultimately be solved by a deeper understanding of the chemical and electrochemical processes occurring during battery operations. We report a study on the electrochemical and chemical stability of Li–O₂ batteries comprising Au‐coated carbon cathodes, a dimethyl sulfoxide (DMSO)‐based electrolyte and Li metal negative electrodes. The use of the aforementioned Au‐coated cathodes in combination with a 1 <sc>M</sc> lithium bis(trifluoromethane)sulfonimide (LiTFSI)–DMSO electrolyte guarantees very good cycling stability (&gt;300 cycles) by minimizing eventual side reactions. The main drawbacks arise from the high reactivity of the Li metal electrode when in contact with the O₂‐saturated DMSO‐based electrolyte.</p> </abstract>