Electrochemical properties of Si-Ge heterostructures as an anode material for lithium ion batteries

Taeseup Song, Huanyu Cheng, Kaitlin Town, Hyunjung Park, Robert W. Black, Sangkyu Lee, Won Il Park, Yonggang Huang, John A. Rogers, Linda F. Nazar*, Ungyu Paik

*Corresponding author for this work

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

Si-Ge composites have recently been explored as an anode material for lithium-ion batteries due to their stable cycle performance and excellent rate capability. Although previous reports show the benefits of Si-Ge composites on electrochemical performance, the specific mechanism and structural effects have been overlooked. Here, the structural effect of Si-Ge heterogeneous nanostructures on both mechanics and kinetics is systematically studied through theoretical analysis and detailed experimental results. Si-Ge and Ge-Si core-shell nanowires are employed for this study. The Si-Ge core-shell nanowires show a much improved electrochemical performance, especially cycle performance and rate capability, when compared to those of the Ge-Si core-shell nanowires electrode. On the basis of the detailed experimental results and associated theoretical analysis, its is demonstrated that the strain distribution and Li diffusivity and/or diffusion path are significantly affected by the Si-Ge heterostructure, which induce different mechanics and kinetics associated with lithium.

Original languageEnglish (US)
Pages (from-to)1458-1464
Number of pages7
JournalAdvanced Functional Materials
Volume24
Issue number10
DOIs
StatePublished - Mar 12 2014

Fingerprint

Electrochemical properties
Nanowires
electric batteries
Heterojunctions
Anodes
anodes
lithium
nanowires
Mechanics
ions
Kinetics
Composite materials
Lithium
cycles
composite materials
strain distribution
Nanostructures
kinetics
diffusivity
Electrodes

Keywords

  • alloys
  • batteries
  • charge transport

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Song, Taeseup ; Cheng, Huanyu ; Town, Kaitlin ; Park, Hyunjung ; Black, Robert W. ; Lee, Sangkyu ; Park, Won Il ; Huang, Yonggang ; Rogers, John A. ; Nazar, Linda F. ; Paik, Ungyu. / Electrochemical properties of Si-Ge heterostructures as an anode material for lithium ion batteries. In: Advanced Functional Materials. 2014 ; Vol. 24, No. 10. pp. 1458-1464.
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abstract = "Si-Ge composites have recently been explored as an anode material for lithium-ion batteries due to their stable cycle performance and excellent rate capability. Although previous reports show the benefits of Si-Ge composites on electrochemical performance, the specific mechanism and structural effects have been overlooked. Here, the structural effect of Si-Ge heterogeneous nanostructures on both mechanics and kinetics is systematically studied through theoretical analysis and detailed experimental results. Si-Ge and Ge-Si core-shell nanowires are employed for this study. The Si-Ge core-shell nanowires show a much improved electrochemical performance, especially cycle performance and rate capability, when compared to those of the Ge-Si core-shell nanowires electrode. On the basis of the detailed experimental results and associated theoretical analysis, its is demonstrated that the strain distribution and Li diffusivity and/or diffusion path are significantly affected by the Si-Ge heterostructure, which induce different mechanics and kinetics associated with lithium.",
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author = "Taeseup Song and Huanyu Cheng and Kaitlin Town and Hyunjung Park and Black, {Robert W.} and Sangkyu Lee and Park, {Won Il} and Yonggang Huang and Rogers, {John A.} and Nazar, {Linda F.} and Ungyu Paik",
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Song, T, Cheng, H, Town, K, Park, H, Black, RW, Lee, S, Park, WI, Huang, Y, Rogers, JA, Nazar, LF & Paik, U 2014, 'Electrochemical properties of Si-Ge heterostructures as an anode material for lithium ion batteries', Advanced Functional Materials, vol. 24, no. 10, pp. 1458-1464. https://doi.org/10.1002/adfm.201302122

Electrochemical properties of Si-Ge heterostructures as an anode material for lithium ion batteries. / Song, Taeseup; Cheng, Huanyu; Town, Kaitlin; Park, Hyunjung; Black, Robert W.; Lee, Sangkyu; Park, Won Il; Huang, Yonggang; Rogers, John A.; Nazar, Linda F.; Paik, Ungyu.

In: Advanced Functional Materials, Vol. 24, No. 10, 12.03.2014, p. 1458-1464.

Research output: Contribution to journalArticle

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T1 - Electrochemical properties of Si-Ge heterostructures as an anode material for lithium ion batteries

AU - Song, Taeseup

AU - Cheng, Huanyu

AU - Town, Kaitlin

AU - Park, Hyunjung

AU - Black, Robert W.

AU - Lee, Sangkyu

AU - Park, Won Il

AU - Huang, Yonggang

AU - Rogers, John A.

AU - Nazar, Linda F.

AU - Paik, Ungyu

PY - 2014/3/12

Y1 - 2014/3/12

N2 - Si-Ge composites have recently been explored as an anode material for lithium-ion batteries due to their stable cycle performance and excellent rate capability. Although previous reports show the benefits of Si-Ge composites on electrochemical performance, the specific mechanism and structural effects have been overlooked. Here, the structural effect of Si-Ge heterogeneous nanostructures on both mechanics and kinetics is systematically studied through theoretical analysis and detailed experimental results. Si-Ge and Ge-Si core-shell nanowires are employed for this study. The Si-Ge core-shell nanowires show a much improved electrochemical performance, especially cycle performance and rate capability, when compared to those of the Ge-Si core-shell nanowires electrode. On the basis of the detailed experimental results and associated theoretical analysis, its is demonstrated that the strain distribution and Li diffusivity and/or diffusion path are significantly affected by the Si-Ge heterostructure, which induce different mechanics and kinetics associated with lithium.

AB - Si-Ge composites have recently been explored as an anode material for lithium-ion batteries due to their stable cycle performance and excellent rate capability. Although previous reports show the benefits of Si-Ge composites on electrochemical performance, the specific mechanism and structural effects have been overlooked. Here, the structural effect of Si-Ge heterogeneous nanostructures on both mechanics and kinetics is systematically studied through theoretical analysis and detailed experimental results. Si-Ge and Ge-Si core-shell nanowires are employed for this study. The Si-Ge core-shell nanowires show a much improved electrochemical performance, especially cycle performance and rate capability, when compared to those of the Ge-Si core-shell nanowires electrode. On the basis of the detailed experimental results and associated theoretical analysis, its is demonstrated that the strain distribution and Li diffusivity and/or diffusion path are significantly affected by the Si-Ge heterostructure, which induce different mechanics and kinetics associated with lithium.

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