Relationships between polypyrrole synthesis conditions, its morphology and electronic structure with supercapacitor properties measured in electrolytes with different ions and pH values

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorIurchenkova, A. A.en_US
dc.contributor.authorKallio, T.en_US
dc.contributor.authorFedorovskaya, E. O.en_US
dc.contributor.departmentDepartment of Chemistry and Materials Scienceen
dc.contributor.groupauthorElectrochemical Energy Conversionen
dc.contributor.organizationDepartment of Chemistry and Materials Scienceen_US
dc.date.accessioned2021-12-01T07:51:01Z
dc.date.available2021-12-01T07:51:01Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2023-07-24en_US
dc.date.issued2021-09-20en_US
dc.descriptionFunding Information: This work was supported by the Ministry of Science and Higher Education of the Russian Federation project No FSUS-2020-0036. We thank HZB (Helmholtz Zentrum Berlin) for the allocation of synchrotron radiation beam time. The TEM was performed on the equipment of CKP “VTAN” in the ATRC department of NSU by G. K. Krivyakin. The authors acknowledge S. A. Martynova for FTIR measurements and E. V. Lobiak for XPS spectra. The SEM was performed on the equipment of Aalto OtaNano Nanomicroscope Center. The Raman spectra were performed on equipment of Aalto OtaNano Low-Temperature Laboratory. Funding Information: This work was supported by the Ministry of Science and Higher Education of the Russian Federation project No FSUS-2020-0036. We thank HZB (Helmholtz Zentrum Berlin) for the allocation of synchrotron radiation beam time. The TEM was performed on the equipment of CKP ?VTAN? in the ATRC department of NSU by G. K. Krivyakin. The authors acknowledge S. A. Martynova for FTIR measurements and E. V. Lobiak for XPS spectra. The SEM was performed on the equipment of Aalto OtaNano Nanomicroscope Center. The Raman spectra were performed on equipment of Aalto OtaNano Low-Temperature Laboratory. Publisher Copyright: © 2021
dc.description.abstractDespite a large number of articles about synthesis methods, structure, morphology and electrochemical properties of polypyrrole, none of these works reports the relationships between polypyrrole synthetic conditions, the electronic states of atoms in the polymer chains and its electrochemical properties in various electrolytes. Our work is dedicated to filling part of this gap. This work is focused on the effect of the synthetic medium used for polypyrrole synthesis on their atomic and electronic structure and morphology as well as investigation of the influence of these on the electrochemical characteristics of polypyrrole in aqueous electrolytes with different ions and pH values within a supercapacitor setup. It is shown that synthetic medium does not affect polymer particle shapes but changes particle sizes. Using oxygen functional groups containing synthetic medium based on water and ethanol leads to a decrease in C:N ratio, increase in C:O ratio, increase in the concentration of positively charged nitrogen-species and formation of linear-structured polymer chains. Contrary, acetonitrile-based synthetic medium without oxygen-containing functional groups leads to an increase in C:N ratio and concentration of neutrally charged nitrogen species, decrease in C:O ratio and formation of branched-structured polymer chains. Electrochemical properties of polypyrrole depend on the nature of the electrolyte, then nitrogen species and oxygen-containing functional groups in polypyrrole structure, and the size of polypyrrole particles. The favorable electrolyte for using polypyrrole in supercapacitors is neutral. The specific capacitance of polypyrrole produced in acetonitrile is shown to reach the value of ~ 385 F g −1 which is stable for more than 10,000 cycles in 1M KCl aqueous solution.en
dc.description.versionPeer revieweden
dc.format.extent12
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationIurchenkova, A A, Kallio, T & Fedorovskaya, E O 2021, ' Relationships between polypyrrole synthesis conditions, its morphology and electronic structure with supercapacitor properties measured in electrolytes with different ions and pH values ', Electrochimica Acta, vol. 391, 138892 . https://doi.org/10.1016/j.electacta.2021.138892en
dc.identifier.doi10.1016/j.electacta.2021.138892en_US
dc.identifier.issn0013-4686
dc.identifier.issn1873-3859
dc.identifier.otherPURE UUID: 6595c95e-fc62-4b10-a9fe-5fec34eb8ef4en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/6595c95e-fc62-4b10-a9fe-5fec34eb8ef4en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85111035319&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/76138228/CHEM_Iurchenkova_et_al_Relationships_between_polypyrrole_synthesis_2021_Electrochimica_Acta.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/111354
dc.identifier.urnURN:NBN:fi:aalto-2021120110504
dc.language.isoenen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofseriesElectrochimica Actaen
dc.relation.ispartofseriesVolume 391en
dc.rightsopenAccessen
dc.subject.keywordAqueous electrolytesen_US
dc.subject.keywordElectronically conducting polymeren_US
dc.subject.keywordFTIRen_US
dc.subject.keywordPolypyrroleen_US
dc.subject.keywordSupercapacitorsen_US
dc.subject.keywordXPSen_US
dc.titleRelationships between polypyrrole synthesis conditions, its morphology and electronic structure with supercapacitor properties measured in electrolytes with different ions and pH valuesen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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