Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 14, Issue 30, Pages 10540-10546Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2cp41761h
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Funding
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of FreedomCAR and Vehicle Technologies of the DOE [DE-AC03-76SF00098]
- Ford-MIT Alliance
- MRSEC Program of the National Science Foundation [DMR-0819762]
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The oxidation kinetics of Li2O2 was studied in a carbonate-free electrolyte using electrodes consisting of non-catalyzed and catalyzed Vulcan carbon (VC) and chemically synthesized Li2O2 particles. VC and Au nanoparticles supported on VC (Au/C) were fairly inactive for catalyzing the oxidation of Li2O2, where oxidation currents greater than 10 mA g(carbon)(-1) were found only at voltages equal to and greater than 4.0 V vs. Li (V-Li). Pt and Ru nanoparticles supported on VC (Pt/C and Ru/C) could significantly increase the kinetics of Li2O2 oxidation, where Li2O2 could be removed largely at voltages below 4 V-Li. In addition, Pt/C and Ru/C showed quick initiation of Li2O2 oxidation in contrast to VC and Au/C.
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