Tailoring structure for improved sodium mobility and electrical properties in V2O5-Nb2O5-P2O5 Glass(es)-(Ceramics)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F23%3A39920371" target="_blank" >RIV/00216275:25310/23:39920371 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0022369723002512?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0022369723002512?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpcs.2023.111461" target="_blank" >10.1016/j.jpcs.2023.111461</a>
Alternative languages
Result language
angličtina
Original language name
Tailoring structure for improved sodium mobility and electrical properties in V2O5-Nb2O5-P2O5 Glass(es)-(Ceramics)
Original language description
This study investigates the influence of structural modifications induced by the introduction of Nb2O5 on the thermal, (micro)structural, and electrical properties of quaternary system 35Na2O-10V2O5-(55-x)P2O5-xNb2O5 (x = 0-40 mol%). Non-monotonic trends in DC conductivity and activation energy are attributed to the facilitating effect of Nb2O5 on the transport of Na+ ions, confirming the mixed glass former effect. The results demonstrate that the electrical conductivity mechanism is purely ionic, with V2O5 acting as both, glass modifier and network-former with vanadate units being in predominantly 4-fold coordination and without actively participating in the conduction process. Complementary Raman and IR-ATR spectroscopic studies in combination with solid-state impedance spectroscopy (SS-IS) reveal a strong correlation between structural and electrical properties indicating that the enhancement in conductivity is driven by the formation of mixed niobatephosphate glass network. The increase in conductivity is followed by a gradual transition of glass structure from a predominantly phosphate glass network into a mixed niobate-phosphate glass network. In the predominantly niobate network, the 3D clustering of NbO6 octahedra hinders the transport of Na+ ions. The scaling features of the conductivity spectra additionally confirm the ionic mechanism of electrical transport and provide insight into the local dynamics of Na+ ions.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physics and Chemistry of Solids
ISSN
0022-3697
e-ISSN
1879-2553
Volume of the periodical
181
Issue of the periodical within the volume
October
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
111461
UT code for WoS article
001021258300001
EID of the result in the Scopus database
2-s2.0-85161333551