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Pseudocapacitive behaviour of FeSx grown on stainless steel up to 1.8 V in aqueous electrolyte

2019-12Journal article Restricted access
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dc.contributor.authorUpadhyay, Kush
dc.contributor.authorTuyen, Nguyen
dc.contributor.authorMoura E Silva, Teresa
dc.contributor.authorCarmezim, Maria
dc.contributor.authorMONTEMOR, MARIA
dc.date.accessioned2020-04-07T15:29:47Z
dc.date.available2020-04-07T15:29:47Z
dc.date.issued2019-12
dc.description.abstractIron sulfide was synthesized for 4 h, 7 h and 12 h by a hydrothermal process directly on stainless steel current collectors. The synthesis time determined the material morphology and electrochemical response. The shortest synthesis time promoted the formation of randomly oriented nanowires that evolved to nanosheets decorated with nanoflakes, organized in a cuboidal-like morphology upon longer synthesis times. XRD, Raman, FTIR and XPS investigations confirmed the formation of FeSx. The electrochemical activity was studied in a potential window ranging from - 0.95 to 0 V and the material obtained after 7 h of synthesis stored the maximum specific capacitance of 730 mF cm(-2) at the current density of 1 mA cm(-2). This material also retained approximately 34% of its initial capacitance at 10 mA cm(-2) and showed very good cycling stability, keeping around 95% of the specific capacitance after 2000 galvanostatic charge-discharge (GCD) cycles. The kinetic analysis of the electrochemical results revealed the predominance of diffusional controlled processes. An asymmetric cell was assembled using FeS,, as negative electrode and carbon nanofoam (CNF) as positive electrode. The FeSx parallel to CNF cell showed enhanced capacitive response in a potential window of 1.8 V in 1 M Na2SO4 electrolyte and delivered specific capacitance of 236 mF cm(-2) at 0.5 mA cm(-2) with good rate capability. The FeSx parallel to CNF cell stored maximum energy density of 0.11 mW h cm(-2) at the power density of 0.45 mW cm(-2). The cell showed very good stability by retaining 83% of the initial capacitance after 2000 cycles of consecutive charge discharge.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationUPADHYAY, Kush K.; [et al] – Pseudocapacitive behaviour of FeSx grown on stainless steel up to 1.8 V in aqueous electrolyte. Journal of Energy Storage. ISSN: 2352-152X. Vol. 26 (2019), pp. 1-12pt_PT
dc.identifier.doi10.1016/j.est.2019.100949pt_PT
dc.identifier.issn2352-152X
dc.identifier.urihttp://hdl.handle.net/10400.21/11427
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationUID/QUI/00100/2019 - FCTpt_PT
dc.relationM-ERA-NET/0004/2014 - FCTpt_PT
dc.relation.publisherversionhttps://pdf.sciencedirectassets.com/308665/1-s2.0-S2352152X19X00067/1-s2.0-S2352152X19305523/main.pdf?X-Amz-Date=20200407T151659Z&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Signature=2e3a6219a133d4842ccb522823e9690a3936732ae495182891c2d7532279fd04&X-Amz-Credential=ASIAQ3PHCVTY3SX2BNWG%2F20200407%2Fus-east-1%2Fs3%2Faws4_request&type=client&tid=prr-f089fccd-73ce-465f-9753-56f704713f92&sid=650b25e46774b74fdd99c1830bc22c74271egxrqb&pii=S2352152X19305523&X-Amz-SignedHeaders=host&X-Amz-Security-Token=IQoJb3JpZ2luX2VjELb%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEaCXVzLWVhc3QtMSJIMEYCIQC7XC9chU6gerlb6R4z%2BQ1k3O4GN%2F7CNbui7qtd29S46gIhAPDckIGHz%2FvpoOh0nylAY%2FEXaww3q7vbYnZC3rPcGQ45Kr0DCL%2F%2F%2F%2F%2F%2F%2F%2F%2F%2F%2FwEQAxoMMDU5MDAzNTQ2ODY1Igxr75mCEvK31zqz04IqkQPA71JVVqVeXziXRjpsGtKwna6hMmxsz%2BazqTFtUpwtVgxnAxTtz30x0Z7cn9ecbd%2BLzyRTFrwAQF5SVn09xF0PlKysjllYk137s6x%2B2v%2FGGAFYv3vSjV7xPWZvKwwiKaFt%2BUEWw%2Fl2vPOw1Vlq%2FujMBEDIxqvnijpSKdUDX6sCDbZOyAEKxsd2z4%2Frzh15vLn4%2FxACJODdnpb%2BoK7rsFVgpfj%2BN35s9DIgTW%2FfAtB7PKnJvOcaEj%2BJLJLnt9MWpZ2Z6vby9Zx77THlnusj6QUJXXKph90yIcNsTYAWtxDPL33bzN0PwWZaLiaUqHFIFtxcnCyjRmNlS06GcY2SRKZWDIcYoqGGSUJWDN0yqHOAiE6VvD8xsXbyxWa8ixOzYaBridDutHzu0%2Fq01C52NDs6yTqOW5FpEnRCFrOR%2Bs2qSJVagB3UcKNZr%2FT0v42BnfdimQhvJaRY1ObyIoLwmJ7qs3riAzRKN9%2FnhXzT8kGufacUyQNGuhSk8Pv%2BJVja08VmJWoTwEgfGPr8BimfmDEV9TDLh7L0BTrqATnfmDHHEcWNza3NQdJ6bzxkdKyjuUlV4WITsWYAWVzJFd3TAvvcgEI%2Fvj3o7cCcjQu33WTLK87gVbSxtQ5RCFDFTgEDv%2FPiWRKP6InOKQsXXVgwvzF%2FHkn%2Byalt8fWH1R0BrQUFfresh8HhHjBdowuyDM9RcEVNe%2BWu32%2F3NZcFryNVB%2F5bnTA6kfv%2BPl7IpgdQ2%2BbohMZC7FjIIXrn137Rg%2BzrW9maB3j5ztSGD7sFd%2Bm%2FCCZ%2B46ajD3L2GE6LRaptdwcCM0fsg3m%2FNvveFzmL5mtFrhmVXYH0322OCo4uH6D1%2FM%2BgRTGJDQ%3D%3D&host=68042c943591013ac2b2430a89b270f6af2c76d8dfd086a07176afe7c76c2c61&X-Amz-Expires=300&hash=9bf399ed02c42d079990f07ac95de1837aa6a05a1e243386734135ef4f87f276pt_PT
dc.subjectIron sulfidept_PT
dc.subjectCuboidal morphologypt_PT
dc.subjectNegative electrodept_PT
dc.subjectHydrothermal synthesispt_PT
dc.subjectPseudocapacitorpt_PT
dc.subjectEnergy storagept_PT
dc.titlePseudocapacitive behaviour of FeSx grown on stainless steel up to 1.8 V in aqueous electrolytept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage12pt_PT
oaire.citation.startPage1pt_PT
oaire.citation.titleJournal of Energy Storagept_PT
oaire.citation.volume26pt_PT
person.familyNameUpadhyay
person.familyNameMoura e Silva
person.familyNameCarmezim
person.familyNameMONTEMOR
person.givenNameKush
person.givenNameTeresa
person.givenNameMaria
person.givenNameFATIMA
person.identifier2555577
person.identifier572597
person.identifier.ciencia-idB61F-5699-0F1E
person.identifier.ciencia-id2D17-B93D-44BC
person.identifier.ciencia-id5B18-7F83-3065
person.identifier.ciencia-id3C16-79AA-7E94
person.identifier.orcid0000-0003-0120-6871
person.identifier.orcid0000-0001-8402-6600
person.identifier.orcid0000-0002-0110-187X
person.identifier.orcid0000-0001-7835-6814
person.identifier.ridG-8065-2019
person.identifier.ridF-8778-2014
person.identifier.scopus-author-id56018964500
person.identifier.scopus-author-id6506601258
person.identifier.scopus-author-id6506753582
person.identifier.scopus-author-id7004347821
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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