Surface engineering strategy using urea to improve the rate performance of Na2Ti3O7 in Na-ion batteries

Costa, Sara I R and Choi, Yong-Seok and Fielding, Alistair J and Naylor, Andrew J and Griffin, John M and Sofer, Zdenek and Scanlon, David O and Tapia Ruiz, Nuria (2020) Surface engineering strategy using urea to improve the rate performance of Na2Ti3O7 in Na-ion batteries. Chemistry - A European Journal. ISSN 0947-6539 (In Press)

Full text not available from this repository.

Abstract

Na2Ti3O7 (NTO) is considered a promising anode material for Na-ion batteries due to its layered structure with an open framework and low and safe average operating voltage of 0.3 V vs. Na+/Na. However, its poor electronic conductivity needs to be addressed to make this material attractive for practical applications among other anode choices. Here, we report a safe, controllable and affordable method using urea that significantly improves the rate performance of NTO by producing surface defects such as oxygen vacancies and hydroxyl groups and the secondary phase, Na2Ti6O13. A comprehensive study using a combination of diffraction, microscopic, spectroscopic and electrochemical techniques supported by computational studies based on DFT calculations, was carried out to understand the effects of this treatment on the surface, chemistry and electronic and charge storage properties of NTO. This study underscores the benefits of using urea as a strategy for enhancing the charge storage properties of NTO and thus, unfolding the potential of this material in practical energy storage applications.

Item Type:
Journal Article
Journal or Publication Title:
Chemistry - A European Journal
Additional Information:
© 2020 Wiley-VCH GmbH.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1600
Subjects:
ID Code:
146932
Deposited By:
Deposited On:
03 Sep 2020 16:15
Refereed?:
Yes
Published?:
In Press
Last Modified:
03 Sep 2020 16:15