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A lightweight multifunctional interlayer of sulfur-nitrogen dual-doped graphene for ultrafast, long-life lithium-sulfur batteries

Wang, Lu, Yang, Zhi, Nie, Huagui, Gu, Cancan, Hua, Wuxing, Xu, Xiangju, Chen, Xi'an, Chen, Ying and Huang, Shaoming 2016, A lightweight multifunctional interlayer of sulfur-nitrogen dual-doped graphene for ultrafast, long-life lithium-sulfur batteries, Journal of materials chemistry a, vol. 4, no. 40, pp. 15343-15352, doi: 10.1039/c6ta07027b.

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Title A lightweight multifunctional interlayer of sulfur-nitrogen dual-doped graphene for ultrafast, long-life lithium-sulfur batteries
Author(s) Wang, Lu
Yang, Zhi
Nie, Huagui
Gu, Cancan
Hua, Wuxing
Xu, Xiangju
Chen, Xi'an
Chen, YingORCID iD for Chen, Ying orcid.org/0000-0002-7322-2224
Huang, Shaoming
Journal name Journal of materials chemistry a
Volume number 4
Issue number 40
Start page 15343
End page 15352
Total pages 10
Publisher Royal Society of Chemistry
Place of publication London, Eng.
Publication date 2016-09-12
ISSN 2050-7488
2050-7496
Keyword(s) Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels
Materials Science, Multidisciplinary
Chemistry
Materials Science
HIGH-RATE PERFORMANCE
S BATTERIES
CARBON NANOTUBES
RATE CAPABILITY
LARGE-CAPACITY
CYCLE-LIFE
CATHODE
DISCHARGE
POLYSULFIDES
COMPOSITE
Summary Lithium-sulfur batteries are a promising candidate for next-generation battery systems owing to their low cost and high theoretical capacity and energy density. However, the notorious shuttle effect of the intermediate polysulfides as well as low conductivity of sulfur greatly limits their practical applications. Here, we introduce a new design that uses a porous-CNT/S cathode (PCNT-S) coupled with a lightweight multifunctional porous sulfur-nitrogen dual-doped graphene (SNGE) interlayer. It is confirmed that the introduced SNGE has outstanding conductivity, high ability to trap polysulfides, ability to modulate Li2S2/Li2S growth, and the functionality to protect separator integrity. With such rich functionalities, the SNGE interlayer enables the PCNT-S cathode to deliver a reversible specific capacity of ∼1460 mA h g-1 at 0.25C and a much higher rate performance, up to 40C, with a capacity retention of 130 mA h g-1. Critically, these cathodes exhibited ultrahigh cyclability when cycled at 8C for 1000 cycles, exhibiting a capacity degradation rate of 0.01% per cycle. To the best of our knowledge, such a low capacity degradation rate beyond 5C in the cathodes of advanced Li-S batteries has been reported only rarely. These results impressively revealed the outstanding high-power output performance of the Li-S batteries.
Language eng
DOI 10.1039/c6ta07027b
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2016, The Royal Society of Chemistry.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30089034

Document type: Journal Article
Collection: Institute for Frontier Materials
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