Metastable marcasite NiSe 2 nanodendrites on carbon fiber clothes to suppress polysulfide shuttling for high-performance lithium–sulfur batteries
The incorporation of catalytic components is a promising strategy to promote redox reaction kinetics and suppress polysulfide shuttling for high-performance lithium–sulfur batteries (LSBs). In this work, metastable marcasite NiSe 2 nanodendrites grown on carbon fiber clothes ( m -NiSe 2 /CFC) were s...
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Published in | Nanoscale Vol. 13; no. 39; pp. 16487 - 16498 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
14.10.2021
|
Online Access | Get full text |
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Summary: | The incorporation of catalytic components is a promising strategy to promote redox reaction kinetics and suppress polysulfide shuttling for high-performance lithium–sulfur batteries (LSBs). In this work, metastable marcasite NiSe
2
nanodendrites grown on carbon fiber clothes (
m
-NiSe
2
/CFC) were synthesized to improve chemical adsorption and electrocatalytic activity towards lithium polysulfides. The multifunctional
m
-NiSe
2
/CFC film was utilized as both the interlayer and the three-dimensional (3D) current collector in LSBs. In comparison with the stable pyrite NiSe
2
nanodendrite–covered CFC (
p
-NiSe
2
/CFC) counterpart, the
m
-NiSe
2
/CFC film exhibits even stronger chemisorption, higher catalytic activity and faster reaction kinetics, thereby resulting in significantly improved lithium storage performance. The Al@S/rGO@
m
-NiSe
2
/CFC cell has a high reversible capacity of 1646 mA h g
−1
at 0.2C, a high
Q
L
/
Q
H
ratio of 3.00 at 0.2C, a high rate capability of 900 mA h g
−1
at 4C, and an outstanding cyclic stability exhibiting a low capacity decay of 0.028% per cycle for 600 cycles at 4C. Moreover, a symmetrically sandwiched cathode of
m
-NiSe
2
/CFC@S/rGO@
m
-NiSe
2
/CFC was designed for high sulfur loading LSBs (4.5 mg cm
−2
) with superior electrochemical performance of 3.73 mA h cm
−2
after 100 cycles at 1C rate. Our work opens up a new opportunity to enhance the electrochemical performance of LSBs by phase engineering of NiSe
2
catalysts in sandwiched structural cathodes. |
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ISSN: | 2040-3364 2040-3372 |
DOI: | 10.1039/D1NR04879A |