Na insertion into nanocrystalline Li4Ti5O12 spinel: An electrochemical study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00475663" target="_blank" >RIV/61388955:_____/17:00475663 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/17:00475663 RIV/00216208:11310/17:10367957

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.electacta.2017.05.161" target="_blank" >http://dx.doi.org/10.1016/j.electacta.2017.05.161</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2017.05.161" target="_blank" >10.1016/j.electacta.2017.05.161</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Na insertion into nanocrystalline Li4Ti5O12 spinel: An electrochemical study

Popis výsledku v původním jazyce

Na insertion into sol-gel made nanocrystalline spinel, Li4Ti5O12 (nano LTS) and reference commercial spinel (Aldrich LTS) is studied by cyclic voltammetry and galvanostatic chronopotentiometry at 1C and 2C charging/discharging rates. Nanocrystalline LTS exhibits the best performance for Na storage, its charge capacities reach 156 mAhg-1 and are twice as high as those of reference Aldrich LTS. A capacity drop of nano LTS taking place during galvanostatic cycling is ascribed to irreversible structural changes induced by Na accommodation in the Li4Ti5O12 lattice. Raman spectroscopy of nano LTS after Na insertion reveals a formation of orthorhombic Li0,5TiO2 phase in original nanocrystalline Li4Ti5O12. The occurrence of this phase, which is commonly formed during Li insertion into anatase, is discussed in terms of induced Li redistribution and its accommodation in very minor anatase impurities detectable by Raman spectroelectrochemistry and HRTEM, but visible neither by X-ray diffractometry nor cyclic voltammetry of Na insertion.

Název v anglickém jazyce

Na insertion into nanocrystalline Li4Ti5O12 spinel: An electrochemical study

Popis výsledku anglicky

Na insertion into sol-gel made nanocrystalline spinel, Li4Ti5O12 (nano LTS) and reference commercial spinel (Aldrich LTS) is studied by cyclic voltammetry and galvanostatic chronopotentiometry at 1C and 2C charging/discharging rates. Nanocrystalline LTS exhibits the best performance for Na storage, its charge capacities reach 156 mAhg-1 and are twice as high as those of reference Aldrich LTS. A capacity drop of nano LTS taking place during galvanostatic cycling is ascribed to irreversible structural changes induced by Na accommodation in the Li4Ti5O12 lattice. Raman spectroscopy of nano LTS after Na insertion reveals a formation of orthorhombic Li0,5TiO2 phase in original nanocrystalline Li4Ti5O12. The occurrence of this phase, which is commonly formed during Li insertion into anatase, is discussed in terms of induced Li redistribution and its accommodation in very minor anatase impurities detectable by Raman spectroelectrochemistry and HRTEM, but visible neither by X-ray diffractometry nor cyclic voltammetry of Na insertion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Electrochimica acta

ISSN

0013-4686

e-ISSN

—

Svazek periodika

245

Číslo periodika v rámci svazku

AUG 2017

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

505-511

Kód UT WoS článku

000406762700056

EID výsledku v databázi Scopus

2-s2.0-85019989612