Kataev, Elmar Yu, Itkis, Daniil M., Fedorov, Alexander V., Senkovsky, Boris V., Usachov, Dmitry Yu ORCID: 0000-0003-0390-0007, Verbitskiy, Nikolay I., Grueneis, Alexander, Barinov, Alexei, Tsukanova, Daria Yu, Volykhov, Andrey A., Mironovich, Kirill V., Krivchenko, Victor A., Rybin, Maksim G., Obraztsova, Elena D., Laubschat, Clemens, Vyalikh, Denis V. and Yashina, Lada V. (2015). Oxygen Reduction by Lithiated Graphene and Graphene-Based Materials. ACS Nano, 9 (1). S. 320 - 327. WASHINGTON: AMER CHEMICAL SOC. ISSN 1936-086X

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Abstract

Oxygen reduction reaction (ORR) plays a key role in lithium-air batteries (LABs) that attract great attention thanks to their high theoretical specific energy several times exceeding that of lithium-ion batteries. Because of their high surface area, high electric conductivity, and low specific weight, various carbons are often materials of choice for applications as the LAB cathode. Unfortunately, the possibility of practical application of such batteries is still under question as the sustainable operation of LABs with carbon cathodes is not demonstrated yet and the cyclability is quite poor, which is usually associated with oxygen reduced species side reactions. However, the mechanisms of carbon reactivity toward these species are still unclear. Here, we report a direct in situ X-ray photoelectron spectroscopy study of oxygen reduction by lithiated graphene and graphene-based materials. Although lithium peroxide (Li2O2) and lithium oxide (Li2O) reactions with carbon are thermodynamically favorable, neither of them was found to react even at elevated temperatures. As lithium superoxide is not stable at room temperature, potassium superoxide (KO2) prepared in situ was used instead to test the reactivity of graphene with superoxide species. In contrast to Li2O2 and Li2O, KO2 was demonstrated to be strongly reactive.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Kataev, Elmar YuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Itkis, Daniil M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fedorov, Alexander V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Senkovsky, Boris V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Usachov, Dmitry YuUNSPECIFIEDorcid.org/0000-0003-0390-0007UNSPECIFIED
Verbitskiy, Nikolay I.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Grueneis, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Barinov, AlexeiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tsukanova, Daria YuUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Volykhov, Andrey A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mironovich, Kirill V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Krivchenko, Victor A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rybin, Maksim G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Obraztsova, Elena D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Laubschat, ClemensUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vyalikh, Denis V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yashina, Lada V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-418256
DOI: 10.1021/nn5052103
Journal or Publication Title: ACS Nano
Volume: 9
Number: 1
Page Range: S. 320 - 327
Date: 2015
Publisher: AMER CHEMICAL SOC
Place of Publication: WASHINGTON
ISSN: 1936-086X
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
PHOTOELECTRON-SPECTROSCOPY; LI-O-2 BATTERIES; LITHIUM-GRAPHITE; AIR BATTERIES; FUEL-CELLS; CARBON; ELECTRODES; SURFACE; XPS; LIMultiple languages
Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/41825

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