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Probing a battery electrolyte drop with ambient pressure photoelectron spectroscopy
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry. Karlsruhe Inst Technol, Inst Appl Mat, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics.
Max Iv Lab, Box 118, S-22100 Lund, Sweden.
Max Iv Lab, Box 118, S-22100 Lund, Sweden.ORCID iD: 0000-0002-3734-0450
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2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 3080Article in journal (Refereed) Published
Abstract [en]

Operando ambient pressure photoelectron spectroscopy in realistic battery environments is a key development towards probing the functionality of the electrode/electrolyte interface in lithium-ion batteries that is not possible with conventional photoelectron spectroscopy. Here, we present the ambient pressure photoelectron spectroscopy characterization of a model electrolyte based on 1M bis(trifluoromethane)sulfonimide lithium salt in propylene carbonate. For the first time, we show ambient pressure photoelectron spectroscopy data of propylene carbonate in the liquid phase by using solvent vapor as the stabilizing environment. This enables us to separate effects from salt and solvent, and to characterize changes in electrolyte composition as a function of probing depth. While the bulk electrolyte meets the expected composition, clear accumulation of ionic species is found at the electrolyte surface. Our results show that it is possible to measure directly complex liquids such as battery electrolytes, which is an important accomplishment towards true operando studies.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2019. Vol. 10, article id 3080
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Physical Chemistry Materials Chemistry
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URN: urn:nbn:se:uu:diva-390789DOI: 10.1038/s41467-019-10803-yISI: 000475295300002PubMedID: 31300638OAI: oai:DiVA.org:uu-390789DiVA, id: diva2:1343092
Funder
Swedish Research Council, 2016-03545Swedish Research Council, 2012-4681Swedish Research Council, 2014-6019Swedish Research Council, 2018-06465Swedish Energy Agency, 40495-1StandUpCarl Tryggers foundation Available from: 2019-08-15 Created: 2019-08-15 Last updated: 2019-08-15Bibliographically approved

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