Graphene quantum dots coating enhances lithium storage performance of CuO nanowires

Changrong Zhu; Dongliang Chao; Jing Sun; Ignacio Mínguez Bacho; Zhanxi Fan; Chin Fan Ng; Xinhui Xia; Hui Huang; Hua Zhang; Ze Xiang Shen; Guqiao Ding; Hong Jin Fan

doi:10.1364/OEDI.2015.JW3A.3

Graphene quantum dots coating enhances lithium storage performance of CuO nanowires

Changrong Zhu, Dongliang Chao, Jing Sun, Ignacio Mínguez Bacho, Zhanxi Fan, Chin Fan Ng, Xinhui Xia, Hui Huang, Hua Zhang, Ze Xiang Shen, Guqiao Ding, Hong Jin Fan

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A new type of CuO/Cu/graphene quantum dots (GQDs) triaxial nanowires (referred as CCG) has been designed and successfully fabricated using a two-step electrochemical process followed by annealing. The synergistic combination of high-capacity metal oxide CuO and conductive layers of Cu and GQDs exerts an enhanced electrochemical performance for Li ion storage. The triaxial nanowire CCG electrode shows an improved reversible capacity (ca. 760 mAh g^-1 cycled at 1/3 C) and rate capability (∼60 % capacity retention cycled at 10 C) compared with nanowires without GQDs coating. A relatively high initial coulombic efficiency (∼87 %) is obtained for the CCG anode as a result of the Cu and GQDs double layers. Meanwhile, the CCG anode showed high capacity retention in long cycles reached up to 1000 cycles. This ultrastability can be ascribed to the GQDs shell which provides an elastic protection for the nanowires and conductive path for electrons. Our results demonstrate the effectiveness of GQDs coating in improving the electrochemical performance and stability of nanostructured electrodes for Li ion batteries and possibly also for other electrochemical devices.

Original language	English
Title of host publication	Optoelectronic Devices and Integration, OEDI 2015
Publisher	Optical Society of America (OSA)
ISBN (Print)	9781943580019
DOIs	https://doi.org/10.1364/OEDI.2015.JW3A.3
Publication status	Published - 2015
Externally published	Yes
Event	Optoelectronic Devices and Integration, OEDI 2015 - Wuhan, China Duration: Jun 16 2015 → Jun 19 2015

Publication series

Name	Optoelectronic Devices and Integration, OEDI 2015

Conference

Conference	Optoelectronic Devices and Integration, OEDI 2015
Country/Territory	China
City	Wuhan
Period	6/16/15 → 6/19/15

Bibliographical note

Publisher Copyright:
© OSA 2015.

ASJC Scopus Subject Areas

Electrical and Electronic Engineering
Instrumentation
Atomic and Molecular Physics, and Optics
General Computer Science

Access to Document

10.1364/OEDI.2015.JW3A.3

Cite this

Zhu, C., Chao, D., Sun, J., Bacho, I. M., Fan, Z., Ng, C. F., Xia, X., Huang, H., Zhang, H., Shen, Z. X., Ding, G., & Fan, H. J. (2015). Graphene quantum dots coating enhances lithium storage performance of CuO nanowires. In Optoelectronic Devices and Integration, OEDI 2015 (Optoelectronic Devices and Integration, OEDI 2015). Optical Society of America (OSA). https://doi.org/10.1364/OEDI.2015.JW3A.3

@inproceedings{30517e59f3b942e5b3c77503d43f820c,

title = "Graphene quantum dots coating enhances lithium storage performance of CuO nanowires",

abstract = "A new type of CuO/Cu/graphene quantum dots (GQDs) triaxial nanowires (referred as CCG) has been designed and successfully fabricated using a two-step electrochemical process followed by annealing. The synergistic combination of high-capacity metal oxide CuO and conductive layers of Cu and GQDs exerts an enhanced electrochemical performance for Li ion storage. The triaxial nanowire CCG electrode shows an improved reversible capacity (ca. 760 mAh g-1 cycled at 1/3 C) and rate capability (∼60 % capacity retention cycled at 10 C) compared with nanowires without GQDs coating. A relatively high initial coulombic efficiency (∼87 %) is obtained for the CCG anode as a result of the Cu and GQDs double layers. Meanwhile, the CCG anode showed high capacity retention in long cycles reached up to 1000 cycles. This ultrastability can be ascribed to the GQDs shell which provides an elastic protection for the nanowires and conductive path for electrons. Our results demonstrate the effectiveness of GQDs coating in improving the electrochemical performance and stability of nanostructured electrodes for Li ion batteries and possibly also for other electrochemical devices.",

author = "Changrong Zhu and Dongliang Chao and Jing Sun and Bacho, {Ignacio M{\'i}nguez} and Zhanxi Fan and Ng, {Chin Fan} and Xinhui Xia and Hui Huang and Hua Zhang and Shen, {Ze Xiang} and Guqiao Ding and Fan, {Hong Jin}",

note = "Publisher Copyright: {\textcopyright} OSA 2015.; Optoelectronic Devices and Integration, OEDI 2015 ; Conference date: 16-06-2015 Through 19-06-2015",

year = "2015",

doi = "10.1364/OEDI.2015.JW3A.3",

language = "English",

isbn = "9781943580019",

series = "Optoelectronic Devices and Integration, OEDI 2015",

publisher = "Optical Society of America (OSA)",

booktitle = "Optoelectronic Devices and Integration, OEDI 2015",

}

Zhu, C, Chao, D, Sun, J, Bacho, IM, Fan, Z, Ng, CF, Xia, X, Huang, H, Zhang, H, Shen, ZX, Ding, G & Fan, HJ 2015, Graphene quantum dots coating enhances lithium storage performance of CuO nanowires. in Optoelectronic Devices and Integration, OEDI 2015. Optoelectronic Devices and Integration, OEDI 2015, Optical Society of America (OSA), Optoelectronic Devices and Integration, OEDI 2015, Wuhan, China, 6/16/15. https://doi.org/10.1364/OEDI.2015.JW3A.3

TY - GEN

T1 - Graphene quantum dots coating enhances lithium storage performance of CuO nanowires

AU - Zhu, Changrong

AU - Chao, Dongliang

AU - Sun, Jing

AU - Bacho, Ignacio Mínguez

AU - Fan, Zhanxi

AU - Ng, Chin Fan

AU - Xia, Xinhui

AU - Huang, Hui

AU - Zhang, Hua

AU - Shen, Ze Xiang

AU - Ding, Guqiao

AU - Fan, Hong Jin

PY - 2015

Y1 - 2015

N2 - A new type of CuO/Cu/graphene quantum dots (GQDs) triaxial nanowires (referred as CCG) has been designed and successfully fabricated using a two-step electrochemical process followed by annealing. The synergistic combination of high-capacity metal oxide CuO and conductive layers of Cu and GQDs exerts an enhanced electrochemical performance for Li ion storage. The triaxial nanowire CCG electrode shows an improved reversible capacity (ca. 760 mAh g-1 cycled at 1/3 C) and rate capability (∼60 % capacity retention cycled at 10 C) compared with nanowires without GQDs coating. A relatively high initial coulombic efficiency (∼87 %) is obtained for the CCG anode as a result of the Cu and GQDs double layers. Meanwhile, the CCG anode showed high capacity retention in long cycles reached up to 1000 cycles. This ultrastability can be ascribed to the GQDs shell which provides an elastic protection for the nanowires and conductive path for electrons. Our results demonstrate the effectiveness of GQDs coating in improving the electrochemical performance and stability of nanostructured electrodes for Li ion batteries and possibly also for other electrochemical devices.

AB - A new type of CuO/Cu/graphene quantum dots (GQDs) triaxial nanowires (referred as CCG) has been designed and successfully fabricated using a two-step electrochemical process followed by annealing. The synergistic combination of high-capacity metal oxide CuO and conductive layers of Cu and GQDs exerts an enhanced electrochemical performance for Li ion storage. The triaxial nanowire CCG electrode shows an improved reversible capacity (ca. 760 mAh g-1 cycled at 1/3 C) and rate capability (∼60 % capacity retention cycled at 10 C) compared with nanowires without GQDs coating. A relatively high initial coulombic efficiency (∼87 %) is obtained for the CCG anode as a result of the Cu and GQDs double layers. Meanwhile, the CCG anode showed high capacity retention in long cycles reached up to 1000 cycles. This ultrastability can be ascribed to the GQDs shell which provides an elastic protection for the nanowires and conductive path for electrons. Our results demonstrate the effectiveness of GQDs coating in improving the electrochemical performance and stability of nanostructured electrodes for Li ion batteries and possibly also for other electrochemical devices.

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U2 - 10.1364/OEDI.2015.JW3A.3

DO - 10.1364/OEDI.2015.JW3A.3

M3 - Conference contribution

AN - SCOPUS:84948449771

SN - 9781943580019

T3 - Optoelectronic Devices and Integration, OEDI 2015

BT - Optoelectronic Devices and Integration, OEDI 2015

PB - Optical Society of America (OSA)

T2 - Optoelectronic Devices and Integration, OEDI 2015

Y2 - 16 June 2015 through 19 June 2015

ER -

Graphene quantum dots coating enhances lithium storage performance of CuO nanowires

Abstract

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Conference

Bibliographical note

ASJC Scopus Subject Areas

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