Lithium confinement and dynamics in hexagonal and monoclinic tungsten oxide nanocrystals: a 7Li solid state NMR study.

Publikationstyp:
Zeitschriftenaufsatz
Metadaten:
Autoren
  • Rene Doeren
  • Martin Panthoefer
  • Leon Praedel
  • Wolfgang Tremel
  • Mihail Mondeshki
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000870405100001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1039/d2nr02492f
eISSN
2040-3372
Externe Identifier
  • Clarivate Analytics Document Solution ID: 5Q8KK
  • PubMed Identifier: 36218075
ISSN
2040-3364
Ausgabe der Veröffentlichung
41
Zeitschrift
NANOSCALE
Paginierung
15348 - 15363
Datum der Veröffentlichung
2022
Status
Published
Titel
Lithium confinement and dynamics in hexagonal and monoclinic tungsten oxide nanocrystals: a <SUP>7</SUP>Li solid state NMR study
Sub types
  • Article
Ausgabe der Zeitschrift
14

Datenquelle: Web of Science (Lite)

Andere Metadatenquellen:
Abstract
<jats:p>Surface and structural (nanoconfined) Li<jats:sup>+</jats:sup> cations, their spatial connectivity with proton species and dynamics (in terms of local strength of binding and exchange) were studied by <jats:sup>7</jats:sup>Li solid state NMR techniques in hexagonal Li<jats:sub><jats:italic>x</jats:italic></jats:sub>(NH<jats:sub>4</jats:sub>)<jats:sub><jats:italic>y</jats:italic></jats:sub>WO<jats:sub>3</jats:sub>.</jats:p>
Autoren
  • René Dören
  • Martin Panthöfer
  • Leon Prädel
  • Wolfgang Tremel
  • Mihail Mondeshki
DOI
10.1039/d2nr02492f
eISSN
2040-3372
ISSN
2040-3364
Ausgabe der Veröffentlichung
41
Zeitschrift
Nanoscale
Sprache
en
Online publication date
2022
Paginierung
15348 - 15363
Status
Published online
Herausgeber
Royal Society of Chemistry (RSC)
Herausgeber URL
http://dx.doi.org/10.1039/d2nr02492f
Datum der Datenerfassung
2024
Titel
Lithium confinement and dynamics in hexagonal and monoclinic tungsten oxide nanocrystals: a <sup>7</sup>Li solid state NMR study
Ausgabe der Zeitschrift
14

Datenquelle: Crossref

Abstract
Mixed-valence tungsten bronzes A<sub><i>x</i></sub>WO<sub>3</sub> (A = alkali metal, NH<sub>4</sub><sup>+</sup>, <i>etc</i>.) are a series of compounds with adaptive structural and compositional features that make them a hot research topic in thermoelectrics, electrochromics, catalysis or energy applications in battery electrodes. The mixed hexagonal lithium ammonium bronze Li<sub><i>x</i></sub>(NH<sub>4</sub>)<sub><i>y</i></sub>WO<sub>3</sub> is a new member of this structural family whose properties are compared to those of the pure hexagonal tungsten bronze (NH<sub>4</sub>)<sub><i>x</i></sub>WO<sub>3</sub>. Surface and structural (nanoconfined) Li<sup>+</sup> cations were characterized by <sup>7</sup>Li single pulse excitation and <sup>1</sup>H-<sup>7</sup>Li cross-polarization (CP) NMR experiments. CP build-up curves and two-dimensional heteronuclear correlation solid-state NMR techniques provide information about the spatial connectivity between different proton and Li<sup>+</sup> species. At 500 °C the bronze structurally transforms from the hexagonal to a monoclinic phase, and defects are formed that are characterized through the Li<sup>+</sup> environment. <sup>7</sup>Li exchange spectroscopy (EXSY) NMR experiments provide information about the chemical exchange between the lithium species. The measured <sup>7</sup>Li <i>T</i><sub>1</sub> and <i>T</i><sub>2</sub> relaxation time constants and the <i>T</i><sub>1</sub>/<i>T</i><sub>2</sub> ratio allow characterizing the local strength of Li<sup>+</sup> binding.
Addresses
  • Department Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128 Mainz, Germany. tremel@uni-mainz.de.
Autoren
  • René Dören
  • Martin Panthöfer
  • Leon Prädel
  • Wolfgang Tremel
  • Mihail Mondeshki
DOI
10.1039/d2nr02492f
eISSN
2040-3372
Externe Identifier
  • PubMed Identifier: 36218075
Open access
false
ISSN
2040-3364
Ausgabe der Veröffentlichung
41
Zeitschrift
Nanoscale
Sprache
eng
Medium
Electronic
Online publication date
2022
Paginierung
15348 - 15363
Datum der Veröffentlichung
2022
Status
Published
Datum der Datenerfassung
2022
Titel
Lithium confinement and dynamics in hexagonal and monoclinic tungsten oxide nanocrystals: a <sup>7</sup>Li solid state NMR study.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
14

Datenquelle: Europe PubMed Central

Abstract
Mixed-valence tungsten bronzes AxWO3 (A = alkali metal, NH4+, etc.) are a series of compounds with adaptive structural and compositional features that make them a hot research topic in thermoelectrics, electrochromics, catalysis or energy applications in battery electrodes. The mixed hexagonal lithium ammonium bronze Lix(NH4)yWO3 is a new member of this structural family whose properties are compared to those of the pure hexagonal tungsten bronze (NH4)xWO3. Surface and structural (nanoconfined) Li+ cations were characterized by 7Li single pulse excitation and 1H-7Li cross-polarization (CP) NMR experiments. CP build-up curves and two-dimensional heteronuclear correlation solid-state NMR techniques provide information about the spatial connectivity between different proton and Li+ species. At 500 °C the bronze structurally transforms from the hexagonal to a monoclinic phase, and defects are formed that are characterized through the Li+ environment. 7Li exchange spectroscopy (EXSY) NMR experiments provide information about the chemical exchange between the lithium species. The measured 7Li T1 and T2 relaxation time constants and the T1/T2 ratio allow characterizing the local strength of Li+ binding.
Autoren
  • René Dören
  • Martin Panthöfer
  • Leon Prädel
  • Wolfgang Tremel
  • Mihail Mondeshki
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/36218075
DOI
10.1039/d2nr02492f
eISSN
2040-3372
Ausgabe der Veröffentlichung
41
Zeitschrift
Nanoscale
Sprache
eng
Country
England
Paginierung
15348 - 15363
Datum der Veröffentlichung
2022
Status
Published online
Titel
Lithium confinement and dynamics in hexagonal and monoclinic tungsten oxide nanocrystals: a 7Li solid state NMR study.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
14

Datenquelle: PubMed

Abstract
<jats:p>Surface and structural (nanoconfined) Li<jats:sup>+</jats:sup> cations, their spatial connectivity with proton species and dynamics (in terms of local strength of binding and exchange) were studied by <jats:sup>7</jats:sup>Li solid state NMR techniques in hexagonal Li<jats:sub><jats:italic>x</jats:italic></jats:sub>(NH<jats:sub>4</jats:sub>)<jats:sub><jats:italic>y</jats:italic></jats:sub>WO<jats:sub>3</jats:sub>.</jats:p>
Autoren
  • René Dören
  • Martin Panthöfer
  • Leon Prädel
  • Wolfgang Tremel
  • Mihail Mondeshki
DOI
10.1039/d2nr02492f
eISSN
2040-3372
ISSN
2040-3364
Zeitschrift
Nanoscale
Sprache
en
Online publication date
2022
Status
Published online
Herausgeber
Royal Society of Chemistry (RSC)
Herausgeber URL
http://dx.doi.org/10.1039/d2nr02492f
Datum der Datenerfassung
2022
Titel
Lithium confinement and dynamics in hexagonal and monoclinic tungsten oxide nanocrystals: a 7Li solid state NMR study.

Datenquelle: Manual

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