Electrochemical performance of sol-gel-made Na2Ti3O7 anode material for Na-ion batteries

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F18%3A00490935" target="_blank" >RIV/61388955:_____/18:00490935 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s10008-018-3958-3" target="_blank" >http://dx.doi.org/10.1007/s10008-018-3958-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10008-018-3958-3" target="_blank" >10.1007/s10008-018-3958-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical performance of sol-gel-made Na2Ti3O7 anode material for Na-ion batteries

Popis výsledku v původním jazyce

Nanocrystalline Na2Ti3O7material is prepared by a newly developed sol-gel procedure. The sol-gel made Na2Ti3O7calcined at 500 °C possesses mesoporous structure and BET surface area of 89 m2g−1. X-ray diffraction and scanning electron microscopy confirm the presence of sintered nanosheets or very small crystals of the size of 10–20 nm with short-range ordering. Electrochemical behavior of nanocrystalline Na2Ti3O7is evaluated by cyclic voltammetry of Na insertion and by galvanostatic chronopotentiometry at different charging rates. The sol-gel made Na2Ti3O7exhibits improved performance as compared to that of the microcrystalline Na2Ti3O7prepared by solid-state synthesis. Discharge capacities of optimized material at charging rates 1, 2, and 5C reach 109, 86, and 63 mAh g−1, respectively, with 100% coulombic efficiency and zero capacity drop over 50 cycles after initial conditioning. Excellent performance of Na2Ti3O7_500 is obviously an effect of its large surface area giving rise to predominantly capacitive mechanism of charge storage. Hence, sol-gel made nanocrystalline Na2Ti3O7represents promising anode material for Na-ion batteries due to its charge capacity and outstanding cycling stability.

Název v anglickém jazyce

Electrochemical performance of sol-gel-made Na2Ti3O7 anode material for Na-ion batteries

Popis výsledku anglicky

Nanocrystalline Na2Ti3O7material is prepared by a newly developed sol-gel procedure. The sol-gel made Na2Ti3O7calcined at 500 °C possesses mesoporous structure and BET surface area of 89 m2g−1. X-ray diffraction and scanning electron microscopy confirm the presence of sintered nanosheets or very small crystals of the size of 10–20 nm with short-range ordering. Electrochemical behavior of nanocrystalline Na2Ti3O7is evaluated by cyclic voltammetry of Na insertion and by galvanostatic chronopotentiometry at different charging rates. The sol-gel made Na2Ti3O7exhibits improved performance as compared to that of the microcrystalline Na2Ti3O7prepared by solid-state synthesis. Discharge capacities of optimized material at charging rates 1, 2, and 5C reach 109, 86, and 63 mAh g−1, respectively, with 100% coulombic efficiency and zero capacity drop over 50 cycles after initial conditioning. Excellent performance of Na2Ti3O7_500 is obviously an effect of its large surface area giving rise to predominantly capacitive mechanism of charge storage. Hence, sol-gel made nanocrystalline Na2Ti3O7represents promising anode material for Na-ion batteries due to its charge capacity and outstanding cycling stability.

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

<a href="/cs/project/GA15-06511S" target="_blank" >GA15-06511S: Studium a optimalizace anorganických nanomateriálů pro kapacitní a inzerční ukládání alkalických kovů</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Solid State Electrochemistry

ISSN

1432-8488

e-ISSN

—

Svazek periodika

22

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

8

Strana od-do

2545-2552

Kód UT WoS článku

000437834600026

EID výsledku v databázi Scopus

2-s2.0-85045838390