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Issue 25, 2012
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Nanostructured Zn-based composite anodes for rechargeable Li-ion batteries

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Abstract

The mechanism of the electrochemical reaction of Zn with Li was investigated by ex situ X-ray diffraction (XRD) analysis combined with a differential capacity plot of the Zn electrode at a low current of 10 mA g−1. The pure Zn electrode showed a high reactivity with Li, with first discharge and charge capacities of 574 and 351 mA h g−1, respectively. In addition, Zn–C and Zn–Al2O3–C composites prepared by simple high-energy mechanical milling were evaluated for use as anode materials in rechargeable Li-ion batteries. The Zn–C nanocomposite was composed of nanosized Zn in an amorphous C matrix, while the Zn–Al2O3–C nanocomposite (obtained by the mechanochemical reduction of ZnO and Al) was composed of nanocrystalline Zn and amorphous Al2O3 in the amorphous C matrix. Electrochemical tests showed that the Zn–Al2O3–C nanocomposite electrode exhibited a high volumetric capacity of more than 1800 mA h cm−3 over 100 cycles.

Graphical abstract: Nanostructured Zn-based composite anodes for rechargeable Li-ion batteries

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Publication details

The article was received on 21 Mar 2012, accepted on 23 Apr 2012 and first published on 24 Apr 2012


Article type: Paper
DOI: 10.1039/C2JM31776A
J. Mater. Chem., 2012,22, 12767-12773

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    Nanostructured Zn-based composite anodes for rechargeable Li-ion batteries

    Y. Hwa, J. H. Sung, B. Wang, C. Park and H. Sohn, J. Mater. Chem., 2012, 22, 12767
    DOI: 10.1039/C2JM31776A

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