Two-Dimensional MoS2 Nanosheets Derived from Cathodic Exfoliation for Lithium Storage Applications
Citation:
Martínez-Jódar, A. and Villar-Rodil, S. and Munuera, J.M. and Castro-Muñiz, A. and Coleman, J.N. and Raymundo-Piñero, E. and Paredes, J.I., Two-Dimensional MoS2 Nanosheets Derived from Cathodic Exfoliation for Lithium Storage Applications, Nanomaterials, 14, 11, 2024Download Item:
Abstract:
The preparation of 2H-phase MoS2 thin nanosheets by electrochemical delamination
remains a challenge, despite numerous efforts in this direction. In this work, by choosing appropriate
intercalating cations for cathodic delamination, the insertion process was facilitated, leading to a
higher degree of exfoliation while maintaining the original 2H-phase of the starting bulk MoS2
material. Specifically, trimethylalkylammonium cations were tested as electrolytes, outperforming
their bulkier tetraalkylammonium counterparts, which have been the focus of past studies. The
performance of novel electrochemically derived 2H-phase MoS2 nanosheets as electrode material for
electrochemical energy storage in lithium-ion batteries was investigated. The lower thickness and
thus higher flexibility of cathodically exfoliated MoS2 promoted better electrochemical performance
compared to liquid-phase and ultrasonically assisted exfoliated MoS2, both in terms of capacity
(447 vs. 371 mA·h·g−1 at 0.2 A·g−1) and rate capability (30% vs. 8% capacity retained when the
current density was increased from 0.2 A·g−1 to 5 A·g−1), as well as cycle life (44% vs. 17% capacity
retention at 0.2 A·g−1 after 580 cycles). Overall, the present work provides a convenient route for
obtaining MoS2 thin nanosheets for their advantageous use as anode material for lithium storage.
Author's Homepage:
http://people.tcd.ie/colemaj
Author: Coleman, Jonathan
Type of material:
Journal ArticleCollections
Series/Report no:
Nanomaterials;14;
11;
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Full text availableDOI:
http://dx.doi.org/10.3390/nano14110932Metadata
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