Imperial College London
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Dr Shelly Conroy

Faculty of Engineering, Department of Materials

Lecturer in Functional Thin Films and Microscopy
 
 
 
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Contact

 

m.conroy Website

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Doherty:2020:1361-6528/ab6678,
author = {Doherty, J and McNulty, D and Biswas, S and Moore, K and Conroy, M and Bangert, U and O'Dwyer, C and Holmes, JD},
doi = {1361-6528/ab6678},
journal = {Nanotechnology},
title = {Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries.},
url = {http://dx.doi.org/10.1088/1361-6528/ab6678},
volume = {31},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - 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 Ge1-x Sn x alloy nanowires as anode materials for Li-ion batteries. Ge1-x Sn x alloy nanowires have been successfully grown via vapor-liquid-solid technique directly on stainless steel current collectors. Ge1-x Sn x (x = 0.048) nanowires were predominantly seeded from the Au0.80Ag0.20 catalysts with negligible amount of growth was also directly catalyzed from stainless steel substrate. The electrochemical performance of the the Ge1-x Sn x 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 ∼921 mAh g-1 after 100 cycles. Voltage profiles and DCPs revealed that the Ge1-x Sn x 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.
AU  - Doherty,J
AU  - McNulty,D
AU  - Biswas,S
AU  - Moore,K
AU  - Conroy,M
AU  - Bangert,U
AU  - O'Dwyer,C
AU  - Holmes,JD
DO  - 1361-6528/ab6678
PY  - 2020///
TI  - Germanium tin alloy nanowires as anode materials for high performance Li-ion batteries.
T2  - Nanotechnology
UR  - http://dx.doi.org/10.1088/1361-6528/ab6678
UR  - https://www.ncbi.nlm.nih.gov/pubmed/31891917
VL  - 31
ER  -
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