Issue 4, 2012
From the journal:

Journal of Materials Chemistry

Cu–Ge core–shell nanowire arrays as three-dimensional electrodes for high-rate capability lithium-ion batteries

Jiazheng Wang,a   Ning Du,*a   Hui Zhang,a   Jingxue Yua  and  Deren Yanga  

* Corresponding authors

a State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
E-mail: dna1122@zju.edu.cn
Fax: +86 571 87952322
Tel: +86 571 87953190

Abstract

We demonstrate the synthesis of three-dimensional Cu–Ge core–shell nanowire array electrodes by directly depositing Ge on the surface of pre-synthesized Cu nanowire arrays via an rf-sputtering method. When used as anodes of lithium-ion batteries, the Cu–Ge nanowire arrays display a high capacity of 1419 mAh g−1 at 0.5 C after 40 cycles and 734 mAh g−1 at 60 C after 80 cycles, which is better than planar electrodes. The improved performance can be attributed to the good electrical contact, fast electron transport and good strain accommodation of the nanowire array electrodes. The effect of the thickness of Ge layer on the electrochemical performance of the three-dimensional electrodes has also been investigated.

Graphical abstract: Cu–Ge core–shell nanowire arrays as three-dimensional electrodes for high-rate capability lithium-ion batteries

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Article information

DOI
https://doi.org/10.1039/C1JM14430H
Article type
Paper
Submitted
07 Sep 2011
Accepted
28 Oct 2011
First published
28 Nov 2011

J. Mater. Chem., 2012,22, 1511-1515

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Cu–Ge core–shell nanowire arrays as three-dimensional electrodes for high-rate capability lithium-ion batteries

J. Wang, N. Du, H. Zhang, J. Yu and D. Yang, J. Mater. Chem., 2012, 22, 1511 DOI: 10.1039/C1JM14430H

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