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).

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. [ABSTRACT FROM AUTHOR]