Communication—Lithium Ion Concentration Effect in PYR 14 TFSI Ionic Liquid for Li-O 2 Battery Cathodes

Abstract

The oxygen reduction reaction (ORR) has been studied on Au cathodes in O-2 saturated PYR14TFSI ionic liquid (IL) electrolyte using cyclic voltammetry, rotating ring disc electrode (RRDE), electrochemical quartz crystal microbalance (EQCM) and differential electrochemical mass spectrometry (DEMS). At different Li+ concentrations in the IL competition of Li+ and PYR14+ for superoxide ion results in dismutation of Li+ O-2(-) and formation of insoluble Li2O2. (C) The Author(s) 2017. Published by ECS. All rights reserved.