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Issue 30, 2011
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Nanosize Si anode embedded in super-elastic nitinol (Ni–Ti) shape memory alloy matrix for Li rechargeable batteries

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Abstract

A nanosize Si embedded in super-elastic Nitinol alloy matrix composite was synthesized in large-scale using arc melting followed by a rapid quenching method. Both X-ray diffraction and high resolution transmission electron microscope with energy dispersive spectroscopy analyses confirmed that approximately 50 nm Si crystallites were surrounded by the Ni–Ti matrix. Ex situsynchrotron XRD was performed to elucidate the phase transition of active materials during lithiation and delithiation. The local structural changes of the Ni–Ti inactive matrix during cycling were investigated by ex situX-ray absorption spectroscopy analyses. This anode material showed an excellent electrochemical stability since the elastic behavior of the inactive Nitinol matrix absorbed the stress generated due to the volume expansion during lithiation of the nanosized Si embedded.

Graphical abstract: Nanosize Si anode embedded in super-elastic nitinol (Ni–Ti) shape memory alloy matrix for Li rechargeable batteries

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Publication details

The article was received on 09 Mar 2011, accepted on 18 May 2011 and first published on 23 Jun 2011


Article type: Paper
DOI: 10.1039/C1JM11020A
J. Mater. Chem., 2011,21, 11213-11216

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    Nanosize Si anode embedded in super-elastic nitinol (Ni–Ti) shape memory alloy matrix for Li rechargeable batteries

    H. Jung, Y. Kim, M. Sung, Y. Hwa, G. Jeong, G. Kim and H. Sohn, J. Mater. Chem., 2011, 21, 11213
    DOI: 10.1039/C1JM11020A

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