Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
CORRECTED PROOF
Electrochemical Characteristics of Micrometer-sized Sn and Acetylene Black Composites Prepared by Mechanical Milling for Sodium-ion Battery Anodes
Ryoji MARUBAYASHIYoshitsugu YAMAMOTOMitsuhiro HIROTA
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JOURNALS OPEN ACCESS Advance online publication
Supplementary material

Article ID: 21-00035

CORRECTED PROOF: May 18, 2021
UNCORRECTED PROOF: April 24, 2021
ACCEPTED MANUSCRIPT: April 09, 2021
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Abstract

Five types of micrometer-sized Sn and acetylene black (AB) composite powders were prepared by mechanical milling for 1, 3, 6, 12, and 24 h. The Sn/AB powders obtained, in addition to Sn-only powders were added to a binder and conductive material, and then dried under vacuum to prepare negative electrodes (anodes) for sodium-ion batteries (SIBs). SIBs were fabricated with the anodes in the form of 2032-type coin cells, and were evaluated using charge-discharge tests up to 50 cycles within the cutoff voltage range of 0.005–0.65 V at a constant current of 50 mA g−1 at 25 °C. Maximum discharge capacities of 614 to 651 mAh g−1 were obtained with all the anodes prepared with both the Sn-only and the Sn/AB composites. However, the discharge capacities of the Sn-only and Sn/AB composites milled for 1 and 3 h were significantly decreased as the charge-discharge cycle increased. In contrast, the Sn/AB composites milled for 6 h or more exhibited improved cycle characteristics; capacities of 635, 619, and 584 mAh g−1 were maintained during 50 cycles of testing with the Sn/AB_6h, Sn/AB_12h, and Sn/AB_24h samples, respectively, which were significantly higher than the anode prepared with the Sn-only powder (135 mAh g−1).

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© The Author(s) 2021. Published by ECSJ.

This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium provided the original work is properly cited. [DOI: 10.5796/electrochemistry.21-00035].
http://creativecommons.org/licenses/by/4.0/
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