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Realizing high reversible capacity: 3D intertwined CNTs inherently conductive network for CuS as an anode for lithium ion batteries

Realizing high reversible capacity: 3D intertwined CNTs inherently conductive network for CuS as an anode for lithium ion batteries
Realizing high reversible capacity: 3D intertwined CNTs inherently conductive network for CuS as an anode for lithium ion batteries
CuS nanospheres interconnected by the carbon nanotubes (CNTs) have been successfully prepared via a facile one-step microwave-assisted method. The component and microstructure of CuS/CNTs hybrid materials are well characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM). Assembled as electrodes and tested in lithium ion batteries, the composites show impressive electrochemical performances. After 450 cycles, the CuS/0.1 CNT and CuS/0.5 CNT release more than 437 and 569 mAh g−1, respectively, at 400 mA g−1, which are superior to those of contrast experiments (pristine CuS and CuS mechanically mixing with CNTs). Even at the high current density of 6400 mA g−1, the CuS/0.5 CNT still displays the reversible capacity of about 400 mAh g−1. The improved performances can be ascribed to the inherently CNTs conducting network, boosting the interior electron transport and reaction kinetics, so that a significantly enhanced reversible capacities and rate capability can be realized. Furthermore, the surface properties and reaction kinetics of electrodes are also investigated via cyclic voltammetry (CV) and galvanostatic intermittence titration (GITT) measurements, proving the enhanced lithium storage properties.
Anode, Battery, CNTs, Conductive network, CuS
1385-8947
49-56
Wang, Yunhui
b996c61d-a63c-4da2-b1bd-39fac531bb0a
Zhang, Yiyong
7415da5e-795e-4f95-b621-5c80660aac6b
Li, He
1d46f87c-8509-43b9-9ee5-eb1065c4de0f
Peng, Yueying
e41317da-f79f-4869-82ce-7c08f2a51368
Li, Jiyang
ed6ad869-2dbe-4832-8940-2318aa714a1d
Wang, Jing
4a777f2e-291b-4a7d-9e92-9254219d42e6
Hwang, Bing Joe
e8627d9b-f368-46ee-9f8b-d93370e8baae
Zhao, Jinbao
40b1eebf-6f3e-4767-a559-39ab8aca25c0
Wang, Yunhui
b996c61d-a63c-4da2-b1bd-39fac531bb0a
Zhang, Yiyong
7415da5e-795e-4f95-b621-5c80660aac6b
Li, He
1d46f87c-8509-43b9-9ee5-eb1065c4de0f
Peng, Yueying
e41317da-f79f-4869-82ce-7c08f2a51368
Li, Jiyang
ed6ad869-2dbe-4832-8940-2318aa714a1d
Wang, Jing
4a777f2e-291b-4a7d-9e92-9254219d42e6
Hwang, Bing Joe
e8627d9b-f368-46ee-9f8b-d93370e8baae
Zhao, Jinbao
40b1eebf-6f3e-4767-a559-39ab8aca25c0

Wang, Yunhui, Zhang, Yiyong, Li, He, Peng, Yueying, Li, Jiyang, Wang, Jing, Hwang, Bing Joe and Zhao, Jinbao (2018) Realizing high reversible capacity: 3D intertwined CNTs inherently conductive network for CuS as an anode for lithium ion batteries. Chemical Engineering Journal, 332, 49-56. (doi:10.1016/j.cej.2017.09.070).

Record type: Article

Abstract

CuS nanospheres interconnected by the carbon nanotubes (CNTs) have been successfully prepared via a facile one-step microwave-assisted method. The component and microstructure of CuS/CNTs hybrid materials are well characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM). Assembled as electrodes and tested in lithium ion batteries, the composites show impressive electrochemical performances. After 450 cycles, the CuS/0.1 CNT and CuS/0.5 CNT release more than 437 and 569 mAh g−1, respectively, at 400 mA g−1, which are superior to those of contrast experiments (pristine CuS and CuS mechanically mixing with CNTs). Even at the high current density of 6400 mA g−1, the CuS/0.5 CNT still displays the reversible capacity of about 400 mAh g−1. The improved performances can be ascribed to the inherently CNTs conducting network, boosting the interior electron transport and reaction kinetics, so that a significantly enhanced reversible capacities and rate capability can be realized. Furthermore, the surface properties and reaction kinetics of electrodes are also investigated via cyclic voltammetry (CV) and galvanostatic intermittence titration (GITT) measurements, proving the enhanced lithium storage properties.

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More information

Accepted/In Press date: 10 September 2017
e-pub ahead of print date: 11 September 2017
Published date: 15 January 2018
Keywords: Anode, Battery, CNTs, Conductive network, CuS

Identifiers

Local EPrints ID: 424326
URI: http://eprints.soton.ac.uk/id/eprint/424326
ISSN: 1385-8947
PURE UUID: 26ea8c8d-7e58-402b-b71c-3836eeef365f

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Date deposited: 05 Oct 2018 11:36
Last modified: 22 Jul 2022 22:20

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Contributors

Author: Yunhui Wang
Author: Yiyong Zhang
Author: He Li ORCID iD
Author: Yueying Peng
Author: Jiyang Li
Author: Jing Wang
Author: Bing Joe Hwang
Author: Jinbao Zhao

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