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Authordc.contributor.authorOrive Gómez De Segura, Joseba 
Authordc.contributor.authorFernández de Luis, Roberto 
Authordc.contributor.authorLarrea, Edurne S. 
Authordc.contributor.authorMartínez Amesti, Ana 
Authordc.contributor.authorAltomare, Angela 
Authordc.contributor.authorRizzi, Rosanna 
Authordc.contributor.authorLezama, Luis 
Authordc.contributor.authorArriortua, María I. 
Authordc.contributor.authorGómez Cámer, Juan Luis 
Authordc.contributor.authorJauregui, María 
Authordc.contributor.authorCasas Cabanas, Montse 
Authordc.contributor.authorLisoni, Judit 
Cita de ítemdc.identifier.citationDalton Trans., 2020, 49, 3856es_ES
Abstractdc.description.abstractThree hydrated double layered vanadium oxides, namely Na(0.35)V(2)O(5)0.8(H2O), K-0.36(H3O)(0.15)V2O5 and (NH4)(0.37)V(2)O(5)0.15(H2O), were obtained by using mild hydrothermal conditions. Their delta type structural frameworks were solved by high-resolution synchrotron X-ray powder diffraction and the interlayer spacings were interpreted from difference Fourier maps. The inter-slab distances are modulated by the water content and the special arrangements of the alkali and ammonium cations. The XPS measurements denote mixed valence systems with high contents of V4+ ions up to 40%. The monitoring of the V4+ EPR signal over time suggests a reduction of the electronic delocalization on account of the partial oxidation to V5+. The electrochemical performance of the active phases is strongly conditioned by the vacuum-drying process of the electrodes, showing better capacity retention when vacuum is not applied. In situ X-ray diffraction shows a structural mechanism of contraction/expansion of the bilayers upon lithium insertion/extraction where the alkali ions behave as structural stabilizers. Galvanostatic cycling at very low current density implies migration of the alkali "pillars" triggering the collapse of the structure.es_ES
Patrocinadordc.description.sponsorshipMillennium Nucleus Multimat Spanish Ministerio de Ciencia, Innovación y Universidades (MINECO) ENE2016-81020-Res_ES
Publisherdc.publisherRoyal Society of Chemistryes_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceDalton Transactionses_ES
Keywordsdc.subjectSingle-crystal structurees_ES
Keywordsdc.subjectHydrothermal synthesises_ES
Keywordsdc.subjectLayered structureses_ES
Keywordsdc.subjectFacile synthesises_ES
Keywordsdc.subjectCathode materiales_ES
Keywordsdc.subjectRaman microspectrometryes_ES
Keywordsdc.subjectStructural chemistryes_ES
Keywordsdc.subjectElectrode materialses_ES
Títulodc.titleExploring new hydrated delta type vanadium oxides for lithium intercalationes_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile