January 28, 2020 Dataset Open Access

Doherty, Jessica; McNulty, David; Biswas, Subhajit; Moore, Kalani; Conroy, Michele; Bangert, Ursel; O'Dwyer, Colm; Holmes, Justin D.

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    "doi": "10.1088/1361-6528/ab6678", 
    "description": "<p><strong>Abstract</strong><br>\nThe 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>", 
    "language": "eng", 
    "title": "Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries", 
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      "volume": "31", 
      "issue": "16", 
      "pages": "165402", 
      "title": "Nanotechnology"
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        "title": "Silicon Compatible, Direct Band-Gap Nanowire Materials For Beyond-CMOS Devices", 
        "acronym": "", 
        "program": "SFI Investigator Programme", 
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    "keywords": [
      "Nanowire, Germanium-tin, Li-Ion Battery"
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    "publication_date": "2020-01-28", 
    "creators": [
      {
        "affiliation": "University College Cork, Ireland", 
        "name": "Doherty, Jessica"
      }, 
      {
        "affiliation": "University College Cork, Ireland", 
        "name": "McNulty, David"
      }, 
      {
        "affiliation": "University College Cork, Ireland", 
        "name": "Biswas, Subhajit"
      }, 
      {
        "affiliation": "University of Limerick, Ireland", 
        "name": "Moore, Kalani"
      }, 
      {
        "affiliation": "University of Limerick, Ireland", 
        "name": "Conroy, Michele"
      }, 
      {
        "affiliation": "University of Limerick, Ireland", 
        "name": "Bangert, Ursel"
      }, 
      {
        "affiliation": "University College Cork, Ireland", 
        "name": "O'Dwyer, Colm"
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      {
        "affiliation": "University College Cork, Ireland", 
        "name": "Holmes, Justin D."
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    "notes": "Data from Nanotechnology, 2020, 31, 165402.", 
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