A systematic study of Nasicon-type Li1+xMxTi2-x(PO4)3 (M:Cr, Al, Fe) by neutron diffraction and impedance spectroscopy

Simple item page
dc.contributor.authorPérez Estébanez, Marta
dc.contributor.authorIsasi Marín, Josefa
dc.contributor.authorRivera Calzada, Alberto Carlos
dc.contributor.authorTobbens, Daniel
dc.contributor.authorLeón Yebra, Carlos
dc.date.accessioned2024-01-19T13:54:59Z
dc.date.available2024-01-19T13:54:59Z
dc.date.issued2014
dc.description.abstractA systematic study of Li1+ xMxTi2 − x(PO4)3 with M=Al, Cr and Fe and 0 ≤ x ≤ 1 has been carried out by X-ray and neutron powder diffraction and by impedance spectroscopy. The analysis of the diffraction data allowed us to describe the disposition of the lithium atoms within the structure. They were found to occupy two different positions, the well-known M1 and a new position called M2′. The addition of trivalent metals into the LiTi2(PO4)3 compound, even in small amount, gives rise to the liberation of the M1 sites and simultaneous occupation of the M2′ sites. This situation becomes more pronounced as the substituent content increases, meaning a higher delocalization of lithium atoms within the structure.Moreover, rising temperature also provokes the movement of lithium fromM1 to M2′. The impedance spectroscopy measurements allowed us to relate the electrical properties to the observations of the crystal structure. Both dc bulk and grain boundary ionic conductivity showa thermally activated behavior, and their values increase with substituent content until compositions of x= 0.2–0.3. The activation energy for bulk dc conductivity hardly changes with the substitution, and the main factor affecting the variation of the ionic conductivity is the pre-exponential factor. We find indeed a correlation between the pre-exponential factor and the degree of disorder of the lithium atoms in the structure as determined from neutron diffraction data. The highest conductivity was found in the sample Li1.3Al0.3Ti1.7(PO4)3 with a value of 6.2 × 10−3 S cm−1 at room temperature and activation energy of 0.30 eV, which is comparable with those measured in the best ionic conductors reported to date.
dc.description.departmentDepto. de Pintura y Conservación-Restauración
dc.description.departmentDepto. de Física de Materiales
dc.description.facultyFac. de Bellas Artes
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipUniversidad Complutense de Madrid
dc.description.sponsorshipMinisterio de Ciencia, Innovación y Universidades (España)
dc.description.sponsorshipComunidad de Madrid
dc.description.statuspub
dc.identifier.citationPérez-Estébanez, M., et al. «A Systematic Study of Nasicon-Type Li1+xMxTi2−x(PO4)3 (M: Cr, Al, Fe) by Neutron Diffraction and Impedance Spectroscopy». Solid State Ionics, vol. 266, noviembre de 2014, pp. 1-8. https://doi.org/10.1016/j.ssi.2014.07.018.
dc.identifier.doi10.1016/j.ssi.2014.07.018
dc.identifier.issn0167-2738
dc.identifier.officialurlhttps://doi.org/10.1016/j.ssi.2014.07.018
dc.identifier.urihttps://hdl.handle.net/20.500.14352/94094
dc.journal.titleSolid State Ionics
dc.language.isoeng
dc.page.final8
dc.page.initial1
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsrestricted access
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject.cdu54
dc.subject.keywordNasicon-type structure
dc.subject.keywordNeutron diffraction
dc.subject.keywordIonic conductivity
dc.subject.keywordOccupation factor
dc.subject.ucmQuímica
dc.subject.unesco23 Química
dc.titleA systematic study of Nasicon-type Li1+xMxTi2-x(PO4)3 (M:Cr, Al, Fe) by neutron diffraction and impedance spectroscopy
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number266
dspace.entity.typePublication
relation.isAuthorOfPublication6ad69803-800b-4244-9927-e7e52dc03f84
relation.isAuthorOfPublication57702872-f198-424a-88e5-360c3ab1ae93
relation.isAuthorOfPublication65d45b0a-357f-4ec4-9f97-0ffd3e1cbdcc
relation.isAuthorOfPublication213f0e33-39f1-4f27-a134-440d5d16a07c
relation.isAuthorOfPublication.latestForDiscovery6ad69803-800b-4244-9927-e7e52dc03f84
Download
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
A_systematic_study_of_Nasicon.pdf
Size:
2.01 MB
Format:
Adobe Portable Document Format
Download
Collections
Artículos