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

Yoon Hwa; Ji Hyun Sung; Bin Wang; Cheol Min Park; Hun Joon Sohn

doi:10.1039/c2jm31776a

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

Yoon Hwa, Ji Hyun Sung, Bin Wang, Cheol Min Park, Hun Joon Sohn

Research output: Contribution to journal › Article › peer-review

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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-Al ₂O 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 ₂O ₃-C nanocomposite (obtained by the mechanochemical reduction of ZnO and Al) was composed of nanocrystalline Zn and amorphous Al ₂O ₃ in the amorphous C matrix. Electrochemical tests showed that the Zn-Al ₂O ₃-C nanocomposite electrode exhibited a high volumetric capacity of more than 1800 mA h cm ^-3 over 100 cycles.

Original language	English (US)
Pages (from-to)	12767-12773
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	22
Issue number	25
DOIs	https://doi.org/10.1039/c2jm31776a
State	Published - Jul 7 2012
Externally published	Yes

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Chemistry(all)
Materials Chemistry

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title = "Nanostructured Zn-based composite anodes for rechargeable Li-ion batteries",

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-Al 2O 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 2O 3-C nanocomposite (obtained by the mechanochemical reduction of ZnO and Al) was composed of nanocrystalline Zn and amorphous Al 2O 3 in the amorphous C matrix. Electrochemical tests showed that the Zn-Al 2O 3-C nanocomposite electrode exhibited a high volumetric capacity of more than 1800 mA h cm -3 over 100 cycles.",

author = "Yoon Hwa and Sung, {Ji Hyun} and Bin Wang and Park, {Cheol Min} and Sohn, {Hun Joon}",

year = "2012",

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doi = "10.1039/c2jm31776a",

language = "English (US)",

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T1 - Nanostructured Zn-based composite anodes for rechargeable Li-ion batteries

AU - Hwa, Yoon

AU - Sung, Ji Hyun

AU - Wang, Bin

AU - Park, Cheol Min

AU - Sohn, Hun Joon

PY - 2012/7/7

Y1 - 2012/7/7

N2 - 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 2O 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 2O 3-C nanocomposite (obtained by the mechanochemical reduction of ZnO and Al) was composed of nanocrystalline Zn and amorphous Al 2O 3 in the amorphous C matrix. Electrochemical tests showed that the Zn-Al 2O 3-C nanocomposite electrode exhibited a high volumetric capacity of more than 1800 mA h cm -3 over 100 cycles.

AB - 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 2O 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 2O 3-C nanocomposite (obtained by the mechanochemical reduction of ZnO and Al) was composed of nanocrystalline Zn and amorphous Al 2O 3 in the amorphous C matrix. Electrochemical tests showed that the Zn-Al 2O 3-C nanocomposite electrode exhibited a high volumetric capacity of more than 1800 mA h cm -3 over 100 cycles.

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ER -

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

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