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The nanostructure of the Si–Al eutectic and its use in lithium batteries

Published online by Cambridge University Press:  28 June 2013

Wenchao Zhou ,
Tianchan Jiang ,
Hui Zhou ,
Yuxuan Wang ,
Jiye Fang  and
M. Stanley Whittingham
Wenchao Zhou
Affiliation:
Institute for Materials Research, State University of New York at Binghamton, Binghamton, New York
Tianchan Jiang
Affiliation:
Department of Chemistry, State University of New York at Binghamton, Binghamton, New York
Hui Zhou
Affiliation:
Institute for Materials Research, State University of New York at Binghamton, Binghamton, New York
Yuxuan Wang
Affiliation:
Institute for Materials Research, State University of New York at Binghamton, Binghamton, New York
Jiye Fang
Affiliation:
Institute for Materials Research, State University of New York at Binghamton, Binghamton, New York; Department of Chemistry, State University of New York at Binghamton, Binghamton, New York
M. Stanley Whittingham*
Affiliation:
Institute for Materials Research, State University of New York at Binghamton, Binghamton, New York; Department of Chemistry, State University of New York at Binghamton, Binghamton, New York
*
Address all correspondence to M. Stanley Whittingham atstanwhit@gmail.com
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Abstract

Aluminum–silicon alloys are an important class of commercial casting materials having wide applications in automotive and aerospace industries. Etching the Al–Si eutectic leads to selective dissolution of Al, resulting in novel morphology – macroporous Si spheres with a three-dimensional nano network. Up to 5% Al is dissolved in Si, leading to an expansion of the crystal lattice. The resulting porous Si is electrochemically active with lithium and thus can be used as a high capacity anode for lithium-ion batteries. The etching of Al–Si provides a simple and low-cost method of producing nano-structured Si materials.

Type
Research Letters
Information
MRS Communications , Volume 3 , Issue 3 , September 2013 , pp. 119 - 121
Copyright
Copyright © Materials Research Society 2013 

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Supplementary material: File

Whittingham Supplementary Material

Appendix

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