Ionic Conductivity of Lithium Germanium Phosphate Glass-Ceramics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F19%3A39914969" target="_blank" >RIV/00216275:25310/19:39914969 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acs.jpcc.9b03666" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jpcc.9b03666</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.9b03666" target="_blank" >10.1021/acs.jpcc.9b03666</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ionic Conductivity of Lithium Germanium Phosphate Glass-Ceramics

Popis výsledku v původním jazyce

In this study, the effect of induced crystallization on the electrical transport was studied in the mixed glass former glasses with the composition 40Li(2)O-(60 - x)P2O5-xGeO(2), x = 0-25 mol %, as potential solid electrolytes for Li-ion batteries. It has been of interest to investigate how various steps of crystallization influence electrical transport in prepared glass-ceramics. Structural properties of obtained glass-ceramics, which contain single to multicrystalline phases, are characterized by XRD, MAS NMR, and SEM and then correlated with electrical properties studied using impedance spectroscopy. For GeO2-free glass-ceramics, a slight increase in the electrical conductivity is evidenced, whereas a conductivity decrease for glass-ceramics containing up to 20 mol % GeO2 is related to the reduction of a number of lithium ions in the residual glassy phase, since the LiPO3 crystalline phase is formed. The crystallization in the glass-ceramics with higher GeO2 content causes an increase in the electrical conductivity. This increase is a result of two simultaneous contributions. One is the formation of crystallites with well-defined shapes, which creates easy conduction pathways for lithium ion transport within crystalline grains and along crystalline grain boundaries. And the second one is the increase of the predominantly phosphate amorphous phase for samples Ge-25.

Název v anglickém jazyce

Ionic Conductivity of Lithium Germanium Phosphate Glass-Ceramics

Popis výsledku anglicky

In this study, the effect of induced crystallization on the electrical transport was studied in the mixed glass former glasses with the composition 40Li(2)O-(60 - x)P2O5-xGeO(2), x = 0-25 mol %, as potential solid electrolytes for Li-ion batteries. It has been of interest to investigate how various steps of crystallization influence electrical transport in prepared glass-ceramics. Structural properties of obtained glass-ceramics, which contain single to multicrystalline phases, are characterized by XRD, MAS NMR, and SEM and then correlated with electrical properties studied using impedance spectroscopy. For GeO2-free glass-ceramics, a slight increase in the electrical conductivity is evidenced, whereas a conductivity decrease for glass-ceramics containing up to 20 mol % GeO2 is related to the reduction of a number of lithium ions in the residual glassy phase, since the LiPO3 crystalline phase is formed. The crystallization in the glass-ceramics with higher GeO2 content causes an increase in the electrical conductivity. This increase is a result of two simultaneous contributions. One is the formation of crystallites with well-defined shapes, which creates easy conduction pathways for lithium ion transport within crystalline grains and along crystalline grain boundaries. And the second one is the increase of the predominantly phosphate amorphous phase for samples Ge-25.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

<a href="/cs/project/GA18-01976S" target="_blank" >GA18-01976S: Nová perspektivní skla a skokeramické materiály na bázi fosforečnanů a borofosforečnanů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

123

Číslo periodika v rámci svazku

38

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

23312-23322

Kód UT WoS článku

000488334700004

EID výsledku v databázi Scopus

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