Structural studies and selected physical investigations of LiCoO2 obtained by combustion synthesis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F22%3A10251044" target="_blank" >RIV/61989100:27360/22:10251044 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.beilstein-journals.org/bjnano/articles/13/121" target="_blank" >https://www.beilstein-journals.org/bjnano/articles/13/121</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3762/bjnano.13.121" target="_blank" >10.3762/bjnano.13.121</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural studies and selected physical investigations of LiCoO2 obtained by combustion synthesis

Popis výsledku v původním jazyce

Nanocrystalline powders of LiCoO2 were synthesized using a modified solution combustion method, and the effects of the annealing temperature (450-900 degrees C) on structure and composition were investigated using various methods, including XRD, SEM, EPR, and electrical studies. It was found that, as the process temperature increases, the value of the specific surface area decreases, and, hence, the size of the crystallites increases. XRD analysis showed that phase-pure LiCoO2 material was maintained without ad-ditional phases. EPR studies revealed the presence of two Ni3+ complexes resulting from Ni impurities. The electrical properties of the studied LiCoO2 samples were investigated by using impedance spectroscopy. Comparison of the effect of annealing tempera-ture on electrical conductivity shows a very interesting behavior. As the annealing temperature increases, the DC conductivity value increases, reaching a maximum at a temperature of 500 degrees C. However, further increase in the annealing temperature causes a steady decrease in the DC conductivity.

Název v anglickém jazyce

Structural studies and selected physical investigations of LiCoO2 obtained by combustion synthesis

Popis výsledku anglicky

Nanocrystalline powders of LiCoO2 were synthesized using a modified solution combustion method, and the effects of the annealing temperature (450-900 degrees C) on structure and composition were investigated using various methods, including XRD, SEM, EPR, and electrical studies. It was found that, as the process temperature increases, the value of the specific surface area decreases, and, hence, the size of the crystallites increases. XRD analysis showed that phase-pure LiCoO2 material was maintained without ad-ditional phases. EPR studies revealed the presence of two Ni3+ complexes resulting from Ni impurities. The electrical properties of the studied LiCoO2 samples were investigated by using impedance spectroscopy. Comparison of the effect of annealing tempera-ture on electrical conductivity shows a very interesting behavior. As the annealing temperature increases, the DC conductivity value increases, reaching a maximum at a temperature of 500 degrees C. However, further increase in the annealing temperature causes a steady decrease in the DC conductivity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Beilstein journal of nanotechnology

ISSN

2190-4286

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

december

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

1473-1482

Kód UT WoS článku

000894036200001

EID výsledku v databázi Scopus

2-s2.0-85146703143