Journal
NANO ENERGY
Volume 64, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2019.103905
Keywords
Interlayer; Lithium sulfur batteries; CNF; Metal-organic framework
Categories
Funding
- Program for the Outstanding Young Talents of Hebei Province, China
- Cultivation Project of National Engineering Technology Center, China [2017B090903008]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Waterloo
- Waterloo Institute for Nanotechnology, University of Waterloo
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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 conducive, 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).
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