Article (Scientific journals)
Effect of the Calcination Duration on the Electrochemical Properties of Na2Ti3O7 as Anode Material for Na-Ion Batteries
Piffet, Caroline; Eshraghi, Nicolas; Mottet, Gregory et al.
2023In Batteries, 9 (10), p. 495
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Keywords :
Electrical and Electronic Engineering; Electrochemistry; Energy Engineering and Power Technology; operando XRD; insertion mechanism; electrochemical impedance spectroscopy; Na-ion batteries; Na2Ti3O7
Abstract :
[en] The growing interest in Na-ion batteries as a “beyond lithium” technologies for energy storage drives the research for high-performance and environment-friendly materials. Na2Ti3O7 (NTO) as an eco-friendly, low-cost anode material shows a very low working potential of 0.3 V vs. Na+/Na but suffers from poor cycling stability, which properties can be significantly influenced by materials synthesis and treatment. Thus, in this work, the influence of the calcination time on the electrochemical performance and the reaction mechanism during cycling were investigated. NTO heat-treated for 48 h at 800 °C (NTO-48h) demonstrated enhanced cycling performance in comparison to NTO heat-treated for only 8 h (NTO-8h). The pristine material was thoroughly characterized by X-ray diffraction, laser granulometry, X-ray photoelectron spectroscopy, and specific surface area measurements. The reaction mechanisms induced by sodiation/desodiation and cycling were investigated by operando XRD. Electrochemical impedance spectroscopy was used to evidence the evolution of the solid electrolyte interface layer (SEI) and modification of charge transfer resistances as well as the influence of cycling on capacity decay. The evolution of the crystallographic structure of NTO-48h revealed a more ordered structure and lower surface contamination compared to NTO-8h. Moreover, the residual Na4Ti3O7 phase detected after the sodium extraction step in NTO-8h seems correlated to the lower electrochemical performance of NTO-8h compared to NTO-48h.
Disciplines :
Chemistry
Author, co-author :
Piffet, Caroline  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Eshraghi, Nicolas  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Mottet, Gregory;  GREENMAT, CESAM Research Unit, Chemistry Department, University of Liège, Quartier Agora, 13Allée du 6 Août, 4000 Liège, Belgium
Hatert, Frédéric  ;  Université de Liège - ULiège > Département de géologie > Minéralogie et cristallochimie
Światowska, Jolanta ;  Chimie ParisTech—CNRS, Institut de Recherche de Chimie, PSL University, Paris, 11 Rue Pierre et Marie Curie, 75005 Paris, France
Cloots, Rudi ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Boschini, Frédéric ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Language :
English
Title :
Effect of the Calcination Duration on the Electrochemical Properties of Na2Ti3O7 as Anode Material for Na-Ion Batteries
Publication date :
27 September 2023
Journal title :
Batteries
eISSN :
2313-0105
Publisher :
MDPI AG
Volume :
9
Issue :
10
Pages :
495
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
ULiège - University of Liège [BE]
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Région Île-de-France [FR]
Available on ORBi :
since 12 November 2023

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