Nanostructured Zn-based composite anodes for rechargeable Li-ion batteries
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 ch...
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Published in | Journal of materials chemistry Vol. 22; no. 25; pp. 12767 - 12773 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
01.01.2012
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Subjects | |
Online Access | Get full text |
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Summary: | 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-Al
2
O
3
-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-Al
2
O
3
-C nanocomposite (obtained by the mechanochemical reduction of ZnO and Al) was composed of nanocrystalline Zn and amorphous Al
2
O
3
in the amorphous C matrix. Electrochemical tests showed that the Zn-Al
2
O
3
-C nanocomposite electrode exhibited a high volumetric capacity of more than 1800 mA h cm
−3
over 100 cycles.
Zn is cost-effective and environmentally benign when used as an energy storage material. Although Zn activity with Li was very poor, it was engineered to fully react directly by a simple process. It exhibited a strong potential as a promising anode for Li-ion batteries. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0959-9428 1364-5501 |
DOI: | 10.1039/c2jm31776a |