Rational design of a cobalt sulfide nanoparticle-embedded flexible carbon nanofiber membrane electrocatalyst for advanced lithium-sulfur batteries.

Autor: Zhang C; School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China., Song C; School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China., He Z; Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, People's Republic of China., Zhao Y; School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China., He Y; School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China., Bakenov Z; Department of Chemical and Materials Engineering, National Laboratory Astana, Nazarbayev University, Institute of Batteries LLP, Nur-Sultan, 010000, Kazakhstan.
Jazyk: angličtina
Zdroj: Nanotechnology [Nanotechnology] 2021 Aug 17; Vol. 32 (45). Date of Electronic Publication: 2021 Aug 17.
DOI: 10.1088/1361-6528/ac18a2
Abstrakt: Both the sluggish redox kinetics and severe polysulfide shuttling behavior hinders the commercialization of lithium-sulfur (Li-S) battery. To solve these obstacles, we design a cobalt sulfide nanoparticle-embedded flexible carbon nanofiber membrane (denoted as CoS 2 @NCF) as sulfiphilic functional interlayer materials. The hierarchically porous structure of carbon nanofiber is conducive to immobilizing sulfur species and facilitating lithium-ion penetration. Moreover, electrocatalytic CoS 2 nanoparticles can significantly enhance the catalytic effect, achieving favorable adsorption-diffusion-conversion interface of polysulfide. Combined with these synergistic features, the assembled Li-S cell with CoS 2 @NCF interlayer exhibited a great discharge capacity of 950.9 mAh g -1 with prolonged cycle lifespan at 1 C (maintained 648.1 mAh g -1 over 500 cycles). This multifunctional interlayer material used in this contribution provides an advanced route for developing high-energy-density Li-S battery.
(© 2021 IOP Publishing Ltd.)
Databáze: MEDLINE
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