Self-Healing, Ga-Sb Alloy Confined Sn Anode for Stable Na-Ion Storage in Glyme Based Electrolytes
Contribution to Journal
D., Deori, M., Buragohain, Y., Son, S., Kunnikuruvan, Nanjundan, A.K, P., Adelhelm and T., Palaniselvam. 2025. "Self-Healing, Ga-Sb Alloy Confined Sn Anode for Stable Na-Ion Storage in Glyme Based Electrolytes." Small. https://doi.org/10.1002/smll.202504185
Article Title | Self-Healing, Ga-Sb Alloy Confined Sn Anode for Stable Na-Ion Storage in Glyme Based Electrolytes |
---|---|
Authors | D., Deori, M., Buragohain, Y., Son, S., Kunnikuruvan, Nanjundan, A.K, P., Adelhelm and T., Palaniselvam |
Journal Title | Small |
Year | 2025 |
Digital Object Identifier (DOI) | https://doi.org/10.1002/smll.202504185 |
Abstract | In this contribution, the development of a self-healable GaSb alloy featuring a confined Sn (core-shell) structure is reported for stable Na+ storage in an ether-based electrolyte. The core-shell architecture of GaSb@Sn has been validated through high-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) paired with electron energy loss spectroscopy (EELS) analysis. The GaSb@Sn support on carbon electrode has delivered specific capacity of 560 mAh gelectrode?1 at 50 mA g?1 with 89% retention capacity after 1200 cycles and specific capacity of 449 mAh gelectrode?1 at 2 Ag?1 with 82% retention capacity after 2000 cycles. The GaSb@Sn/C electrode stores Na+ by forming Na-Sn, Na-Sb-O, and Na-Ga-O intermetallic compounds, as confirmed by operando XRD studies. Operando electrochemical dilatometry studies reveal that the self-healable electrode expands by 33% at the electrode level during Na+ insertion, significantly lower than the theoretically predicted expansion of Sn, which is 420%. DFT calculations show that the adsorption of diglyme on GaSb@Sn (?0.4 eV) is weaker than that on bulk Sn (?5.1 eV). The weaker interaction between diglyme and GaSb@Sn could be responsible for the thinner SEI formation on the edges of GaSb@Sn, thereby resulting in the high initial coulombic efficiency (GaSb@Sn- 81%, Bulk Sn-62%) and stable cycle life. © 2025 Wiley-VCH GmbH. |
Keywords | batteries |
ANZSRC Field of Research 2020 | 400404. Electrochemical energy storage and conversion |
Permalink -
https://research.usq.edu.au/item/zy7z4/self-healing-ga-sb-alloy-confined-sn-anode-for-stable-na-ion-storage-in-glyme-based-electrolytes
0
total views0
total downloads0
views this month0
downloads this month