Issue 39, 2021

Metastable marcasite NiSe2 nanodendrites on carbon fiber clothes to suppress polysulfide shuttling for high-performance lithium–sulfur batteries

Abstract

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 NiSe2 nanodendrites grown on carbon fiber clothes (m-NiSe2/CFC) were synthesized to improve chemical adsorption and electrocatalytic activity towards lithium polysulfides. The multifunctional m-NiSe2/CFC film was utilized as both the interlayer and the three-dimensional (3D) current collector in LSBs. In comparison with the stable pyrite NiSe2 nanodendrite–covered CFC (p-NiSe2/CFC) counterpart, the m-NiSe2/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-NiSe2/CFC cell has a high reversible capacity of 1646 mA h g−1 at 0.2C, a high QL/QH 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-NiSe2/CFC@S/rGO@m-NiSe2/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 NiSe2 catalysts in sandwiched structural cathodes.

Graphical abstract: Metastable marcasite NiSe2 nanodendrites on carbon fiber clothes to suppress polysulfide shuttling for high-performance lithium–sulfur batteries

Supplementary files

Article information

Article type
Paper
Submitted
27 Лип 2021
Accepted
17 Вер 2021
First published
18 Вер 2021

Nanoscale, 2021,13, 16487-16498

Metastable marcasite NiSe2 nanodendrites on carbon fiber clothes to suppress polysulfide shuttling for high-performance lithium–sulfur batteries

J. Wang, S. Cao, L. Yang, Y. Zhang, K. Xing, X. Lu and J. Xu, Nanoscale, 2021, 13, 16487 DOI: 10.1039/D1NR04879A

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