Zn‐doped MnOx nanowires displaying plentiful crystalline defects and tunable small cross-sections for an optimized volcano-type performance towards supercapacitors

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dc.contributor.authorRibeiro G.A.C.
dc.contributor.authorde Lima S.L.S.
dc.contributor.authorSantos K.E.R.
dc.contributor.authorMendonca J.P.
dc.contributor.authorMacena P.
dc.contributor.authorPessanha E.C.
dc.contributor.authorCordeiro T.C.
dc.contributor.authorGardener J.
dc.contributor.authorSolorzano G.
dc.contributor.authorFonsaca J.E.S.
dc.contributor.authorDomingues S.H.
dc.contributor.authordos Santos C.C.
dc.contributor.authorDourado A.H.B.
dc.contributor.authorTanaka A.A.
dc.contributor.authorda Silva A.G.M.
dc.contributor.authorGarcia M.A.S.
dc.date.accessioned2024-03-12T19:07:45Z
dc.date.available2024-03-12T19:07:45Z
dc.date.issued2023
dc.description.abstract© 2023, The Author(s).MnOx-based nanomaterials are promising large-scale electrochemical energy storage devices due to their high specific capacity, low toxicity, and low cost. However, their slow diffusion kinetics is still challenging, restricting practical applications. Here, a one-pot and straightforward method was reported to produce Zn-doped MnOx nanowires with abundant defects and tunable small cross-sections, exhibiting an outstanding specific capacitance. More specifically, based on a facile hydrothermal strategy, zinc sites could be uniformly dispersed in the α-MnOx nanowires structure as a function of composition (0.3, 2.1, 4.3, and 7.6 wt.% Zn). Such a process avoided the formation of different crystalline phases during the synthesis. The reproducible method afforded uniform nanowires, in which the size of cross-sections decreased with the increase of Zn composition. Surprisingly, we found a volcano-type relationship between the storage performance and the Zn loading. In this case, we demonstrated that the highest performance material could be achieved by incorporating 2.1 wt.% Zn, exhibiting a remarkable specific capacitance of 1082.2 F.g−1 at a charge/discharge current density of 1.0 A g−1 in a 2.0 mol L−1 KOH electrolyte. The optimized material also afforded improved results for hybrid supercapacitors. Thus, the results presented herein shed new insights into preparing defective and controlled nanomaterials by a simple one-step method for energy storage applications.
dc.description.issuenumber1
dc.description.volume18
dc.identifier.doi10.1186/s11671-023-03933-2
dc.identifier.issn2731-9229
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/33981
dc.relation.ispartofDiscover Nano
dc.rightsAcesso Aberto
dc.subject.otherlanguageMnO2
dc.subject.otherlanguageNanowires
dc.subject.otherlanguageOxygen vacancies
dc.subject.otherlanguageSupercapacitors
dc.subject.otherlanguageSurface defects
dc.subject.otherlanguageZn
dc.titleZn‐doped MnOx nanowires displaying plentiful crystalline defects and tunable small cross-sections for an optimized volcano-type performance towards supercapacitors
dc.typeArtigo
local.scopus.citations10
local.scopus.eid2-s2.0-85178483328
local.scopus.subjectCrystalline defects
local.scopus.subjectElectrochemical energy storage devices
local.scopus.subjectHigh specific capacity
local.scopus.subjectLarge-scales
local.scopus.subjectLow toxicity
local.scopus.subjectPerformance
local.scopus.subjectSpecific capacitance
local.scopus.subjectTunables
local.scopus.subjectZn
local.scopus.subjectZn-doped
local.scopus.updated2025-04-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85178483328&origin=inward
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