Dataset Open Access
Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries
Doherty, Jessica; McNulty, David; Biswas, Subhajit; Moore, Kalani; Conroy, Michele; Bangert, Ursel; O'Dwyer, Colm; Holmes, Justin D.
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<dct:title>Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries</dct:title>
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<dct:description><p><strong>Abstract</strong><br> The combination of two active Li-ion materials (Ge and Sn) can result in improved conduction paths and higher capacity retention. Here we report for the first time, the implementation of Ge<sub>1&ndash;x</sub>Sn<sub>x</sub> alloy nanowires as anode materials for Li-ion batteries. Ge<sub>1&minus;x</sub>Sn<sub>x</sub> alloy nanowires have been successfully grown via vapor&ndash;liquid&ndash;solid technique directly on stainless steel current collectors. Ge<sub>1&minus;x</sub>Sn<sub>x</sub> (x = 0.048) nanowires were predominantly seeded from the Au<sub>0.80</sub>Ag<sub>0.20</sub> catalysts with negligible amount of growth was also directly catalyzed from stainless steel substrate. The electrochemical performance of the the Ge<sub>1&minus;x</sub>Sn<sub>x</sub> nanowires as an anode material for Li-ion batteries was investigated via galvanostatic cycling and detailed analysis of differential capacity plots (DCPs). The nanowire electrodes demonstrated an exceptional capacity retention of 93.4% from the 2nd to the 100th charge at a C/5 rate, while maintaining a specific capacity value of &sim;921 mAh g&minus;1 after 100 cycles. Voltage profiles and DCPs revealed that the Ge<sub>1&minus;x</sub>Sn<sub>x</sub> nanowires behave as an alloying mode anode material, as reduction/oxidation peaks for both Ge and Sn were observed, however it is clear that the reversible lithiation of Ge is responsible for the majority of the charge stored.</p></dct:description>
<dct:description>Data from Nanotechnology, 2020, 31, 165402.</dct:description>
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Indexed in
- Publication date:
- January 28, 2020
- DOI:
-
- Keyword(s):
- Nanowire, Germanium-tin, Li-Ion Battery
- Published in:
- Nanotechnology: 31 pp. 165402 (16).
- Grants:
-
Science Foundation Ireland:
- Silicon Compatible, Direct Band-Gap Nanowire Materials For Beyond-CMOS Devices (14/IA/2513)
- License (for files):
- Creative Commons Attribution 4.0 International