Role of oxygen vacancies on the energy storage performance of battery-type NiO electrodes

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dc.contributor.authorPaskocimas, Carlos Alberto
dc.contributor.authorSilva, Thayse R.
dc.contributor.authorSilva, Vinícius D.
dc.contributor.authorFerreira, Luciena S.
dc.contributor.authorAraújo, Allan Jedson Menezes de
dc.contributor.authorTorres, Marco Antonio Morales
dc.contributor.authorSimões, Thiago Araújo
dc.contributor.authorMacedo, Daniel Araújo de
dc.date.accessioned2021-03-24T13:20:42Z
dc.date.available2021-03-24T13:20:42Z
dc.date.issued2020-05
dc.description.resumoIn this study, the influence of the surface oxygen vacancies on the energy storage performance of electrodes based on nickel oxide (NiO) nanoparticles was investigated. NiO samples were synthesized by three facile and low-cost syntheses routes: nitrate calcination, citrate, and combustion methods. The concentration of surface defects in NiO powders was determined using XPS analyses, which showed a higher amount of oxygen vacancies for the sample obtained by nitrate calcination. According to the cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) curves, NiO-based electrodes were classified as battery-like. CV results suggest that redox reactions are diffusion-controlled processes with a faster diffusion rate for the sample obtained by the nitrate calcination method. This is in accordance with the GCD and electrochemical impedance spectroscopy (EIS) results, with higher specific capacity and higher electrical conductivity (lower equivalent series resistance) for the sample obtained by nitrate calcination. The results indicate that oxygen vacancies play an important role in the electrochemical performance of battery-type NiO electrodespt_BR
dc.identifier.citationSILVA, Thayse R.; SILVA, Vinícius D.; FERREIRA, Luciena S.; ARAðJO, Allan J.M.; MORALES, Marco A.; SIMÕES, Thiago A.; PASKOCIMAS, Carlos A.; MACEDO, Daniel A.. Role of oxygen vacancies on the energy storage performance of battery-type NiO electrodes. Ceramics International, [S.L.], v. 46, n. 7, p. 9233-9239, maio 2020. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884219336661?via%3Dihub. Acesso em: 02 dez. 2020. http://dx.doi.org/10.1016/j.ceramint.2019.12.176.pt_BR
dc.identifier.doi10.1016/j.ceramint.2019.12.176
dc.identifier.issn0272-8842
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/31989
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectNiOpt_BR
dc.subjectFacile synthesispt_BR
dc.subjectBattery-type electrodespt_BR
dc.subjectElectrochemical energy storagept_BR
dc.subjectOxygen vacanciespt_BR
dc.titleRole of oxygen vacancies on the energy storage performance of battery-type NiO electrodespt_BR
dc.typearticlept_BR

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