Ge, Y, Chen, Z, Ye, S orcid.org/0000-0001-5152-5753 et al. (3 more authors) (2018) A spheres-in-tube carbonaceous nanostructure for high-capacity and high-rate lithium–sulfur batteries. Journal of Materials Chemistry A, 6 (30). pp. 14885-14893. ISSN 2050-7488
Abstract
The uses of sulfur, which has a high theoretical specific capacity of 1675 mA h g−1, as a commercial cathode for lithium batteries have been substantially hindered by the insulating nature of sulfur and the dissolution of intermediate polysulfides (Li2Sx, 4 < x ≤ 8) into the electrolyte. In this work, a spheres-in-tube carbonaceous nanoarchitecture has been successfully engineered as an effective sulfur host, by encapsulating heteroatom-doped hollow carbon spheres into an intact carbonaceous nanotube (I-HCSs@CT). The structural features including hierarchical porosity and the intact nature of the CT wall and HCS framework have cooperatively endowed I-HCSs@CT with outstanding capability of host loading, good electrical conductivity, a high utilization rate and excellent stability of sulfur. As a result, our sulfur/carbon composites deliver a large discharge capacity of 1426 mA h g−1 at 0.1C with a high sulfur loading of 72.1 wt%. The obtained electrode demonstrates superior high-rate cycling performance, with a high specific capacity of 746 mA h g−1 at 0.5C being retained after 500 cycles.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) The Royal Society of Chemistry 2018. This is an author produced version of a paper published in Journal of Materials Chemistry A. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Molecular & Nanoscale Physics |
Depositing User: | Symplectic Publications |
Date Deposited: | 13 Aug 2018 09:56 |
Last Modified: | 10 Jul 2019 01:07 |
Status: | Published |
Publisher: | Royal Society of Chemistry |
Identification Number: | 10.1039/C8TA05041D |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:134468 |