Mixed Ion-Polaron Glasses as New Catode Materials

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F17%3A39912341" target="_blank" >RIV/00216275:25310/17:39912341 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.5562/cca3330" target="_blank" >http://dx.doi.org/10.5562/cca3330</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5562/cca3330" target="_blank" >10.5562/cca3330</a>

Result language

angličtina

Original language name

Mixed Ion-Polaron Glasses as New Catode Materials

Original language description

Electrical transport in mixed ion-polaron glasses has been investigated in four series of glasses containing transition metal oxides (TMO) namely WO3/MoO3, and Na+/Ag+ ions with the composition xWO3-(30-0.5x)Na2O-(30-0.5x)ZnO-40P2O5, xWO3-(30-0.5x)Ag2O-(30-0.5x)ZnO-40P2O5, xMoO3-(30-0.5x)Na2O-(30-0.5x)ZnO-40P2O5, and xMoO3-(30-0.5x)Ag2O-(30-0.5x)ZnO-40P2O5, 0 ≤ x ≤ 60 (mol%). The DC con-ductivity of Na-glasses up to 30 mol% of WO3 and MoO3 is almost identical due to the dominance of ionic conductivity. In this compositional region, the introduction of tungstate and molybdate units increases the mobility of sodium ions and compensates the decrease in sodium number density. On the other hand, with increasing WO3 and MoO3 content and decreasing Ag+ ion concentration in Ag-glasses the DC conduc-tivity decreases for few orders of magnitude. A significant difference in conductivity is observed for glasses with higher WO3 and MoO3 content. While for glasses containing WO3 the conductivity rapidly increases due to a huge polaronic contribution indicating a turnover from predomi-nantly ionic to polaronic transport, the conductivity for MoO3-glasses decreases in the entire mixed compositional range suggesting dominant ionic transport. The changes in the conduction mechanism with the systematic alternation of the glass composition have been analyzed in correlation with the structural modifications and variations of molybdenum and tungsten in different oxidation states.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Croatica Chemica Acta

ISSN

0011-1643

e-ISSN

—

Volume of the periodical

90

Issue of the periodical within the volume

4

Country of publishing house

HR - CROATIA

Number of pages

9

Pages from-to

657-665

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85046259139