Electrochemical synthesis of germanium-polypyrrole composite nanomaterials in ionic liquids for the fabrication of lithium-ion batteries

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dc.contributor.authorLiu, Zhen
dc.contributor.authorYang, Li
dc.contributor.authorLahiri, Abhishek
dc.contributor.authorRohan, James F.
dc.contributor.authorEndres, Frank
dc.contributor.funderDeutsche Forschungsgemeinschaften
dc.contributor.funderHorizon 2020en
dc.date.accessioned2022-04-06T09:03:14Z
dc.date.available2022-04-06T09:03:14Z
dc.date.issued2022-03-27
dc.date.updated2022-04-06T08:58:02Z
dc.description.abstractHerein, we report the coating of nanostructured germanium using a polypyrrole (PPy) polymer coat as a composite anode material for the fabrication of lithium-ion batteries. The Ge/PPy composites were synthesized following the direct electrochemical deposition method in an ionic liquid (IL). The results revealed that the coating of PPy on Ge helped realize stable battery cycling and reversible capacities, which were not observed in uncoated Ge. The PPy layers could effectively inhibit side reactions between the electrode and electrolyte. The composition of the solid electrolyte interphase (SEI) formed after lithiation/delithiation cycles were analyzed using the X-ray photoelectron spectroscopy (XPS). Compact SEI layers consisted of decomposed TFSI− anion products such as LiF, Li2S, Li2NS2O4, and Li2CO3 at the Ge-PPy/IL interphase. In contrast, thick SEI layers consisted of not only decomposed TFSI− anion and [Py1,4]+ cation products but also chemically or physically adsorbed IL compounds at the Ge/IL interphase. In addition, the PPy coating could effectively inhibit Ge oxidation, resulting in improved battery capacity.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG) (EN 370/28-1)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationLiu, Z., Yang, L., Lahiri, A., Rohan, J. F. and Endres, Frank (2022) 'Electrochemical synthesis of germanium-polypyrrole composite nanomaterials in ionic liquids for the fabrication of lithium-ion batteries', Journal of Energy and Power Technology, 4 (1), (16 pp). doi: 10.21926/jept.2201010.en
dc.identifier.doi10.21926/jept.2201010en
dc.identifier.endpage16en
dc.identifier.issn2690-1692
dc.identifier.issued1en
dc.identifier.journaltitleJournal of Energy and Power Technologyen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/13035
dc.identifier.volume4en
dc.language.isoenen
dc.publisherLidsen Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::RIA/730957/EU/European Infrastructure Powering the Internet of Things/EnABLESen
dc.relation.urihttps://www.lidsen.com/journals/jept/jept-04-01-010
dc.rights© 2022 by the authors. This is an open access article distributed under the conditions of the Creative Commons by Attribution License, which permits unrestricted use, distribution, and reproduction in any medium or format, provided the original work is correctly cited.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subjectIonic liquiden
dc.subjectGermaniumen
dc.subjectPolypyrroleen
dc.subjectLi-ion batteryen
dc.subjectSEIen
dc.subjectXPSen
dc.titleElectrochemical synthesis of germanium-polypyrrole composite nanomaterials in ionic liquids for the fabrication of lithium-ion batteriesen
dc.typeArticle (peer-reviewed)en
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