Electrochemical Activity of Hydrothermally Synthesized Li-Ti-O Cubic Oxides towards Li Insertion.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F02%3A54020146" target="_blank" >RIV/61388955:_____/02:54020146 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical Activity of Hydrothermally Synthesized Li-Ti-O Cubic Oxides towards Li Insertion.

Popis výsledku v původním jazyce

Li-Ti-O oxides prepared by hydrothermal synthesis are active hosts for lithium insertion. Annealing of synthesized samples at temperatures above 250degreesC leads to structural water removal, which causes narrowing of voltammetric peaks and, subsequently, shift of the insertion potential toward more negative potentials. An increase of annealing temperature also improves coulombic efficiency and stability against self-discharge reactions. On the other hand, the lithium insertion/extraction kinetics slowsdown with increasing annealing temperature. Hydrothermally synthesized Li-Ti-O spinels show more favorable charge transfer kinetics as well lithium transport comparing with spinels prepared at 8 00degrees C. Thermodynamics of Li insertion into hydrothermally prepared phases can be described by the Frumkin insertion isotherm. The low temperature prepared spinels seem to be less susceptible to a lithium-insertion triggered phase transition than the high temperature synthesized materials.

Název v anglickém jazyce

Electrochemical Activity of Hydrothermally Synthesized Li-Ti-O Cubic Oxides towards Li Insertion.

Popis výsledku anglicky

Li-Ti-O oxides prepared by hydrothermal synthesis are active hosts for lithium insertion. Annealing of synthesized samples at temperatures above 250degreesC leads to structural water removal, which causes narrowing of voltammetric peaks and, subsequently, shift of the insertion potential toward more negative potentials. An increase of annealing temperature also improves coulombic efficiency and stability against self-discharge reactions. On the other hand, the lithium insertion/extraction kinetics slowsdown with increasing annealing temperature. Hydrothermally synthesized Li-Ti-O spinels show more favorable charge transfer kinetics as well lithium transport comparing with spinels prepared at 8 00degrees C. Thermodynamics of Li insertion into hydrothermally prepared phases can be described by the Frumkin insertion isotherm. The low temperature prepared spinels seem to be less susceptible to a lithium-insertion triggered phase transition than the high temperature synthesized materials.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA203%2F99%2F0879" target="_blank" >GA203/99/0879: Elektrochemické a in-situ AFM studium elektrochemické tvorby tenkých oxidových vrstev s kontrolovanou krystalinitou za zvýšených teplot</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

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

Název periodika

Journal of the Electrochemical Society

ISSN

0013-4651

e-ISSN

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Svazek periodika

149

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

1224-1229

Kód UT WoS článku

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EID výsledku v databázi Scopus

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