Lithium‐Oxygen Batteries: Stabilization of Li Metal Anode in DMSO‐Based Electrolytes via Optimization of Salt–Solvent Coordination for Li–O2 Batteries (Adv. Energy Mater. 14/2017)

Abstract

In article number 1602605, a new approach to enhance the cycling stability of Li-O2 batteries with dimethyl sulfoxide (DMSO) based electrolyte is developed by Wu Xu, Ji-Guang Zhang, and co-workers. It is found that the LiTFSI-3DMSO electrolyte exhibits an optimal concentration in which only most stable TFSI−–Li+–(DMSO)3 complexes exist but Li+–(DMSO)4 solvates and free DMSO solvent molecules are absent. This electrolyte significantly enhances the stability of both Li metal anodes and carbon-based airelectrode. The finding on the fundamental stability of the electrolyte in the absence of free-solvent against the chemical and electrochemical reactions can also be used to enhance the stability of other electrochemical systems.