K–O2 electrochemistry: achieving highly reversible peroxide formation

摘要: Since the advent of lithium–air battery, researchers have focused on understanding underpinning mechanisms oxygen reduction and evolution reaction in aprotic solvents. In this work, presence potassium ions dimethyl sulfoxide was exploited as a model system to refine present mechanistic picture environments. combined approach utilizing differential electrochemical mass spectrometry generator–collector arrangement well classical techniques, reversible formation insoluble peroxide slightly soluble superoxide is shown. As opposed other peroxides non-aqueous metal–oxygen systems, can be reoxidized with an overpotential little 100 mV. The investigation effect partial pressure between 0 1 atmosphere demonstrates how precipitation increases oxidation establishes link work studies, which reversibility has not been identified.