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https://hdl.handle.net/2440/127384
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Type: | Journal article |
Title: | Fe₃O₄@S nanoparticles embedded/coated on the multi-wall carbon nanotubes for rechargeable lithium batteries |
Other Titles: | Fe(3)O(4)@S nanoparticles embedded/coated on the multi-wall carbon nanotubes for rechargeable lithium batteries |
Author: | Gao, G. Zhai, P. Zhang, Q. Shearer, C. Zhao, J. Shapter, J. |
Citation: | Chemical Engineering Journal, 2018; 333:268-275 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 1385-8947 1873-3212 |
Statement of Responsibility: | Guo Gao, Peiyan Zhai, Qiang Zhang, Cameron J. Shearer, Jing Zhao, Joseph G. Shapter |
Abstract: | In the present study, Fe₃O₄@S-CNTs-1, Fe₃O₄@S-CNTs-2 and Fe₃O₄@S-CNTs-3 were prepared via one-pot hydrothermal approach. The core–shell Fe₃O₄@S structures (20–30 nm) are embedded/coated on the oxidized CNTs, inhibiting the huge volume expansion effect of active materials during the cycling process. The Fe₃O₄@S-CNTs-2 cathode presented an initial discharge of 986 mAhg⁻¹ (0.2 C) and gradually decreased to 503 mAhg⁻¹ after 200 cycles, exhibiting the best cycling performance among the prepared hybrid materials. Even at a high current density of 1 C, the Fe₃O₄@S-CNTs-2 cathode still exhibited a discharge capacity of 914 mAhg⁻¹, and maintains a high capacity (466 mAhg⁻¹) after 400 cycles. The Coulombic efficiencies of the synthesized Fe₃O₄@S-CNTs hybrid materials always are 99%, indicating they could effectively diminish the shuttle effects of polysulfide Li₂Sn (2 < n < 8) intermediates in the cycling process. As for the rate performance of Fe₃O₄@S-CNTs hybrid materials, the capacity still can reach up to ∼400 mAhg⁻¹ at a high discharge rate of 5 C. The synergy between the Fe₃O₄@S nanoparticles and oxidized CNTs in the Fe₃O₄@S-CNTs cathode endows the electrode with good electrical conductivity, structural stability and high charge capacity thus providing excellent electrochemical performance. |
Keywords: | Hydrothermal; hybrid materials; lithium batteries; shuttle effects |
Rights: | © 2017 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.cej.2017.09.156 |
Grant ID: | 91634108 21422604 81671737 |
Published version: | http://dx.doi.org/10.1016/j.cej.2017.09.156 |
Appears in Collections: | Aurora harvest 4 Chemical Engineering publications |
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