Synthesis and Characterization of Na2Ti6O13 and Na2Ti6O13/Na2Ti3O7 Sodium Titanates with Nanorod-like Structure as Negative Electrode Materials for Sodium-ion Batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F17%3APU124815" target="_blank" >RIV/00216305:26220/17:PU124815 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S2352152X17301329?via%3Dihub" target="_blank" >http://www.sciencedirect.com/science/article/pii/S2352152X17301329?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.est.2017.07.008" target="_blank" >10.1016/j.est.2017.07.008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis and Characterization of Na2Ti6O13 and Na2Ti6O13/Na2Ti3O7 Sodium Titanates with Nanorod-like Structure as Negative Electrode Materials for Sodium-ion Batteries

Popis výsledku v původním jazyce

In this work, we report microwave assisted hydrothermal synthesis of monoclinic sodium titanates with either tunnel or with mixed tunnel/layered structure. Single phase Na2Ti6O13 and mixed phase Na2Ti6O13/Na2Ti3O7 titanates were studied by electrochemical measurements with cyclic voltammetry, impedance spectroscopy and galvanostatic cycling. SEM images revealed that all the synthesized materials consist of rods with widths in the range of tenths to hundreds nanometers. XRD analysis was used for determination of the phase composition and crystallite size. It was shown that mixed phase electrode material reveals higher capacity and wider active voltage range but has also lower cycling stability. The insertion potential of layered titanate Na2Ti3O7 is much lower than in the case of Na2Ti6O9 and the specific capacity of mixed titanate in the first cycle is double the capacity of pure Na2Ti6O9. Although presence of layered titanate contributed to high specific capacity in early cycling, it allowed a considerable decrease in specific capacity at higher numbers of cycles.

Název v anglickém jazyce

Synthesis and Characterization of Na2Ti6O13 and Na2Ti6O13/Na2Ti3O7 Sodium Titanates with Nanorod-like Structure as Negative Electrode Materials for Sodium-ion Batteries

Popis výsledku anglicky

In this work, we report microwave assisted hydrothermal synthesis of monoclinic sodium titanates with either tunnel or with mixed tunnel/layered structure. Single phase Na2Ti6O13 and mixed phase Na2Ti6O13/Na2Ti3O7 titanates were studied by electrochemical measurements with cyclic voltammetry, impedance spectroscopy and galvanostatic cycling. SEM images revealed that all the synthesized materials consist of rods with widths in the range of tenths to hundreds nanometers. XRD analysis was used for determination of the phase composition and crystallite size. It was shown that mixed phase electrode material reveals higher capacity and wider active voltage range but has also lower cycling stability. The insertion potential of layered titanate Na2Ti3O7 is much lower than in the case of Na2Ti6O9 and the specific capacity of mixed titanate in the first cycle is double the capacity of pure Na2Ti6O9. Although presence of layered titanate contributed to high specific capacity in early cycling, it allowed a considerable decrease in specific capacity at higher numbers of cycles.

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

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

—

Svazek periodika

1

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000417188500006

EID výsledku v databázi Scopus

2-s2.0-85033397068