Axial Si--Ge Heterostructure Nanowires as Lithium-Ion Battery Anodes

Hugh Geaney; Killian Stokes; Grace Flynn; Gerard Bree; Kevin M. Ryan

doi:10.1021/acs.nanolett.8b01988

Axial Si--Ge Heterostructure Nanowires as Lithium-Ion Battery Anodes

Hugh Geaney
, Killian Stokes
, Grace Flynn
, Gerard Bree
, Kevin M. Ryan

Department of Chemical Sciences

University of Limerick

Research output: Contribution to journal › Article › peer-review

Abstract

Here, we report the application of axially heterostructured nanowires consisting of alternating segments of silicon and germanium with a tin seed as lithium-ion battery anodes. During repeated lithiation and delithiation, the heterostructures completely rearrange into a porous network of homogeneously alloyed Si_1-xGe_x ligaments. The transformation was characterized through ex situ TEM, STEM, and Raman spectroscopy. Electrochemical analysis was conducted on the heterostructure nanowires with discharge capacities in excess of 1180 mAh/g for 400 cycles (C/5) and capacities of up to 613 mAh/g exhibited at a rate of 10 C.

Original language	English (Ireland)
Pages (from-to)	5569-5575
Number of pages	7
Journal	Nano Letters
Volume	18
Issue number	9
DOIs	https://doi.org/10.1021/acs.nanolett.8b01988
Publication status	Published - 12 Sep 2018

Keywords

Si-Ge
heterostructure
lithium-ion battery
nanowires
restructuring

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acs.nanolett.8b01988

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title = "Axial Si--Ge Heterostructure Nanowires as Lithium-Ion Battery Anodes",

abstract = "Here, we report the application of axially heterostructured nanowires consisting of alternating segments of silicon and germanium with a tin seed as lithium-ion battery anodes. During repeated lithiation and delithiation, the heterostructures completely rearrange into a porous network of homogeneously alloyed Si1-xGex ligaments. The transformation was characterized through ex situ TEM, STEM, and Raman spectroscopy. Electrochemical analysis was conducted on the heterostructure nanowires with discharge capacities in excess of 1180 mAh/g for 400 cycles (C/5) and capacities of up to 613 mAh/g exhibited at a rate of 10 C.",

keywords = "Si-Ge, heterostructure, lithium-ion battery, nanowires, restructuring",

author = "Hugh Geaney and Killian Stokes and Grace Flynn and Gerard Bree and Ryan, \{Kevin M.\}",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

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doi = "10.1021/acs.nanolett.8b01988",

language = "English (Ireland)",

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AU - Geaney, Hugh

AU - Stokes, Killian

AU - Flynn, Grace

AU - Bree, Gerard

AU - Ryan, Kevin M.

PY - 2018/9/12

Y1 - 2018/9/12

N2 - Here, we report the application of axially heterostructured nanowires consisting of alternating segments of silicon and germanium with a tin seed as lithium-ion battery anodes. During repeated lithiation and delithiation, the heterostructures completely rearrange into a porous network of homogeneously alloyed Si1-xGex ligaments. The transformation was characterized through ex situ TEM, STEM, and Raman spectroscopy. Electrochemical analysis was conducted on the heterostructure nanowires with discharge capacities in excess of 1180 mAh/g for 400 cycles (C/5) and capacities of up to 613 mAh/g exhibited at a rate of 10 C.

AB - Here, we report the application of axially heterostructured nanowires consisting of alternating segments of silicon and germanium with a tin seed as lithium-ion battery anodes. During repeated lithiation and delithiation, the heterostructures completely rearrange into a porous network of homogeneously alloyed Si1-xGex ligaments. The transformation was characterized through ex situ TEM, STEM, and Raman spectroscopy. Electrochemical analysis was conducted on the heterostructure nanowires with discharge capacities in excess of 1180 mAh/g for 400 cycles (C/5) and capacities of up to 613 mAh/g exhibited at a rate of 10 C.

KW - Si-Ge

KW - heterostructure

KW - lithium-ion battery

KW - nanowires

KW - restructuring

UR - https://www.scopus.com/pages/publications/85052316200

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M3 - Article

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SN - 1530-6984

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EP - 5575

JO - Nano Letters

JF - Nano Letters

IS - 9

ER -

Axial Si--Ge Heterostructure Nanowires as Lithium-Ion Battery Anodes

Abstract

Keywords

UN SDGs

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