Vertically rooting multifunctional tentacles on carbon scaffold as efficient polysulfide barrier toward superior lithium-sulfur batteries
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Date
2019-10
Authors
Zhang, Junfan
Li, Gaoran
Zhang, Wen
Wang, Xin
Zhao, Yan
Li, Jingde
Chen, Zhongwei
Advisor
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The rational design of sulfur barrier/host materials plays essential roles in developing high-performance lithium-sulfur (Li-S) batteries. Herein, we developed a hierarchically fibrous framework to establish a conductive, adsorptive, and catalytic barrier toward inhibition on polysulfide shuttling and enhancement in Li-S battery performance. The weaving carbonaceous scaffold with vertically-rooted carbon nanofiber (CNF) tentacles facilitates both short- and long-range electrical conduction as well as efficient exposure of active sites, while the multiple adsorptive and catalytic sites enable strong sulfur confinement and expedited sulfur conversion, thus contributing to a fast and durable sulfur electrochemistry. Attributed to these favorable features, Li-S cells based on the as-developed interlayer achieve excellent cyclability with minimum capacity fading rate of 0.018% over 1000 cycles, high rate capability up to 3 C, and decent performance under high raised sulfur loading up to 8 mg cm−2.
Description
The final publication is available at Elsevier via https://doi.org/10.1016/j.nanoen.2019.103905 © 2019.
This manuscript version is made available under the CC-BY-NC-ND 4.0 license
http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords
interlayer, lithium sulfur batteries, CNF, metal-organic framework