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Issue 30, 2012
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Evidence of catalyzed oxidation of Li2O2 for rechargeable Li–air battery applications

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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

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Publication details

The article was received on 29 May 2012, accepted on 30 May 2012, published on 08 Jun 2012 and first published online on 08 Jun 2012


Article type: Paper
DOI: 10.1039/C2CP41761H
Citation: Phys. Chem. Chem. Phys., 2012,14, 10540-10546
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    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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