File
Authors
Keywords
SnO anode
Na-ion battery
Thick-film electrode
Electrolyte additive
Gas-deposition method
Abstract
SnO thick-film electrodes for Na-ion battery anodes were prepared for the first time by a gasdeposition method, and we investigated the influence of fluoroethylene carbonate as an electrolyte additive on their anode performances. The SnO electrode showed high reversible capacities of 580 mA h g-1 and 260 mA h g-1 at the first cycle and at the 20th cycle, respectively, in an additive-free electrolyte. The cycle performance obtained was much higher than that of an Sn electrode. These results indicate that Na2O formed in the first Na-insertion process played a role as a matrix to alleviate a stress generated by drastic volumetric changes during alloying/dealloying reactions of Sn with Na. When we used fluorothylene carbonate as an additive, the SnO electrode achieved 250 mA h g-1 at the 50th cycle with a good capacity retention. The excellent cycle performance originates from a facile Na-ion transfer through a surface layer formed between the electrode and the electrolyte because the surface layer derived from additive prevents from making itself thicker by suppressing decompositionof the electrolyte.
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
248
Start Page
378
End Page
382
Published Date
2014-02-15
Publisher-DOI
Text Version
Author
Rights
Copyright © 2014 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
Journal of power sources. 2014, 248, 378-382
Department
Faculty of Engineering/Graduate School of Engineering
Language
English