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Niobium-doped titanium oxide anode and ionic liquid electrolyte for a safe sodium-ion battery
Authors
Imoto, Akinobu
Yamaguchi, Kazuki
Keywords
Na-ion battery
Rutile-type titanium oxide
Anode material
onic liquid electrolyte
Non-flammability
Abstract
The anode properties of Nb-doped rutile TiO2 electrodes were investigated in an ionic liquid electrolyte comprised of N-methyl-N-propylpyrrolidinium cation and bis(fluorosulfonyl)amide anion for use in a safe Na-ion battery. Although the electrolyte’s conductivity was lower than that of a conventional organic electrolyte at 30 oC, it showed high conductivity comparable to that of the organic electrolyte at 60 oC. The Nb-doped TiO2 electrode showed excellent cyclability in the ionic liquid electrolyte at 60 oC: a high capacity retention of 97% was observed even at the 350th cycle, which is comparable to value in the organic electrolyte (91%). In a non-flammability test in a closed system, no ignition was observed with the ionic liquid electrolyte even at 300 oC. These results indicate that combination of a Nb-doped TiO2 anode and ionic liquid electrolyte gives not only an excellent cyclability but also high safety for a Na-ion battery operating at a temperature below the sodium’s melting point of 98 oC.
Publisher
Elsevier
Content Type
Journal Article
Link
ISSN・ISBN
0378-7753
NCID
AA1153408X
Journal Title
Journal of power sources
Current Journal Title
Journal of power sources
Volume
329
Start Page
428
End Page
431
Published Date
2016-10-15
Publisher-DOI
Text Version
Author
Rights
Copyright © 2016 Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
Citation
This research was published by Elsevier inc.: H. Usui, et al. Niobium-doped titanium oxide anode and ionic liquid electrolyte for a safe sodium-ion battery. Journal of power sources. 2016, 329, 428-431
Department
Faculty of Engineering/Graduate School of Engineering
Language
English