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Article: Facile synthesis, characterization, and electrochemical performance of multi-scale AgVO3 particles

TitleFacile synthesis, characterization, and electrochemical performance of multi-scale AgVO3 particles
Authors
KeywordsSilver vanadium oxides
Sol–gel method
Materials characterization
Electrochemical performance
Issue Date2016
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jallcom
Citation
Journal of Alloys and Compounds, 2016, v. 674, p. 56-62 How to Cite?
AbstractMulti-scale AgVO3 particles were successfully synthesized from different organic acids using a facile sol–gel method; a series of techniques were then used to characterize the particles. The X-ray Diffraction (XRD) patterns showed that a main characteristic peak of element Ag is at around 38°. The X-ray photoelectron spectroscopy (XPS) spectra demonstrated the binding energies of Ag0 3d (5/2) and Ag0 3d (3/2), which further confirmed the existence of element Ag. In addition, the composition of the samples, including the amorphous phase, was determined with a quantitative X-ray diffraction (QXRD) analysis. With a heating rate of 10 °C/min, the products synthesized with citric acid at 450 °C had a larger amorphous phase (26.4% in wt.%) than the samples synthesized with citric acid at 500 °C. To obtain lesser amorphous phase, the precursors were treated at 500 °C with a slower heating rate of 5 °C/min. The electrochemical performance of these three samples, particularly their suitability as cathode materials for lithium ion batteries, were investigated. The products with minimum amorphous phase (9.4%) showed higher specific discharge capacity than other two samples at the first 40 cycles. However, with the increasing fading rate, only 27% of the initial capacity was retained after 100 cycles. Amorphous phase can stabilize the material and avoid the structural collapse during the cycles. Therefore, under the synergistic effect of amorphous content and particle size, the products obtained at 500 °C with quicker heating rate exhibited the optimal capacity and cycling stability. This electrode showed a high initial capacity of 243 mA h/g and retained 41% of the initial capacity after 100 cycles.
Persistent Identifierhttp://hdl.handle.net/10722/229394
ISSN
2015 Impact Factor: 3.014
2015 SCImago Journal Rankings: 1.006

 

DC FieldValueLanguage
dc.contributor.authorLi, H-
dc.contributor.authorLi, H-
dc.contributor.authorWu, S-
dc.contributor.authorLiao, C-
dc.contributor.authorZhou, Z-
dc.contributor.authorLiu, X-
dc.contributor.authorDjurisic, A-
dc.contributor.authorXie, MH-
dc.contributor.authorTang, C-
dc.contributor.authorShih, K-
dc.date.accessioned2016-08-23T14:10:53Z-
dc.date.available2016-08-23T14:10:53Z-
dc.date.issued2016-
dc.identifier.citationJournal of Alloys and Compounds, 2016, v. 674, p. 56-62-
dc.identifier.issn0925-8388-
dc.identifier.urihttp://hdl.handle.net/10722/229394-
dc.description.abstractMulti-scale AgVO3 particles were successfully synthesized from different organic acids using a facile sol–gel method; a series of techniques were then used to characterize the particles. The X-ray Diffraction (XRD) patterns showed that a main characteristic peak of element Ag is at around 38°. The X-ray photoelectron spectroscopy (XPS) spectra demonstrated the binding energies of Ag0 3d (5/2) and Ag0 3d (3/2), which further confirmed the existence of element Ag. In addition, the composition of the samples, including the amorphous phase, was determined with a quantitative X-ray diffraction (QXRD) analysis. With a heating rate of 10 °C/min, the products synthesized with citric acid at 450 °C had a larger amorphous phase (26.4% in wt.%) than the samples synthesized with citric acid at 500 °C. To obtain lesser amorphous phase, the precursors were treated at 500 °C with a slower heating rate of 5 °C/min. The electrochemical performance of these three samples, particularly their suitability as cathode materials for lithium ion batteries, were investigated. The products with minimum amorphous phase (9.4%) showed higher specific discharge capacity than other two samples at the first 40 cycles. However, with the increasing fading rate, only 27% of the initial capacity was retained after 100 cycles. Amorphous phase can stabilize the material and avoid the structural collapse during the cycles. Therefore, under the synergistic effect of amorphous content and particle size, the products obtained at 500 °C with quicker heating rate exhibited the optimal capacity and cycling stability. This electrode showed a high initial capacity of 243 mA h/g and retained 41% of the initial capacity after 100 cycles.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jallcom-
dc.relation.ispartofJournal of Alloys and Compounds-
dc.rightsPosting accepted manuscript (postprint): © <year>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/-
dc.subjectSilver vanadium oxides-
dc.subjectSol–gel method-
dc.subjectMaterials characterization-
dc.subjectElectrochemical performance-
dc.titleFacile synthesis, characterization, and electrochemical performance of multi-scale AgVO3 particles-
dc.typeArticle-
dc.identifier.emailLi, H: hlli18@hku.hk-
dc.identifier.emailDjurisic, A: dalek@hku.hk-
dc.identifier.emailXie, MH: mhxie@hku.hk-
dc.identifier.emailTang, C: tangc@hku.hk-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityDjurisic, A=rp00690-
dc.identifier.authorityXie, MH=rp00818-
dc.identifier.authorityTang, C=rp01765-
dc.identifier.authorityShih, K=rp00167-
dc.identifier.doi10.1016/j.jallcom.2016.03.010-
dc.identifier.hkuros262256-
dc.identifier.volume674-
dc.identifier.spage56-
dc.identifier.epage62-
dc.publisher.placeNetherlands-

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