Issue 30, 2012

Evidence of catalyzed oxidation of Li2O2 for rechargeable Li–air battery applications

Abstract

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 gcarbon−1 were found only at voltages equal to and greater than 4.0 V vs. Li (VLi). 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 VLi. In addition, Pt/C and Ru/C showed quick initiation of Li2O2 oxidation in contrast to VC and Au/C.

Graphical abstract: Evidence of catalyzed oxidation of Li2O2 for rechargeable Li–air battery applications

Supplementary files

Article information

Article type
Paper
Submitted
29 May 2012
Accepted
30 May 2012
First published
08 Jun 2012

Phys. Chem. Chem. Phys., 2012,14, 10540-10546

Evidence of catalyzed oxidation of Li2O2 for rechargeable Li–air battery applications

J. R. Harding, Y. Lu, Y. Tsukada and Y. Shao-Horn, Phys. Chem. Chem. Phys., 2012, 14, 10540 DOI: 10.1039/C2CP41761H

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