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Two-Dimensional Water-Coupled Metallic MoS2 with Nanochannels for Ultrafast Supercapacitors

Geng, Xiumei, Zhang, Yelong, Han, Yang, Li, Jingxiao, Yang, Lei, Benamara, Mourad, Chen, Liao, Zhu, Hongli·2017·Nano Letters

Abstract

MoS 2 is a promising electrode material for energy storage. However, the intrinsic multilayer pure metallic MoS 2 (M-MoS 2 ) has not been investigated for use in supercapacitors. Here, an ultrafast rate supercapacitor with extraordinary capacitance using a multilayer M-MoS 2 –H 2 O system is first investigated. Intrinsic M-MoS 2 with a monolayer of water molecules covering both sides of nanosheets is obtained through a hydrothermal method with water as solvent. The super electrical conductivity of the as-prepared pure M-MoS 2 is beneficial to electron transport for high power supercapacitor. Meanwhile, nanochannels between the layers of M-MoS 2 –H 2 O with a distance of ∼1.18 nm are favorable for increasing the specific space for ion diffusion and enlarging the surface area for ion adsorption. By virtue of this, M-MoS 2 –H 2 O reaches a high capacitance of 380 F/g at a scan rate of 5 mV/s and still maintains 105 F/g at scan rate of 10 V/s. Furthermore, the specific capacitance of the symmetric supercapacitor based on M-MoS 2 –H 2 O electrodes retain a value as high as 249 F/g under 50 mV/s. These findings suggest that multilayered M-MoS 2 –H 2 O system with ion accessible large nanochannels and efficient charge transport provide an efficient energy storage strategy for ultrafast supercapacitors.

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Metadata

Authors
Geng, X., Zhang, Y., Han, Y., Li, J., Yang, L., Benamara, M., Chen, L., & Zhu, H.
Venue
Nano Letters
Published
2017-02-02
Volume
17
Issue
3
Pages
1825-1832
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W2581090001
Cited by
419
References
5
FWCI
19.01
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Two-Dimensional Water-Coupled Metallic MoS2 with Nanochannels for Ultrafast Supercapacitors. https://app.cochat.ai/papers/10.1021/acs.nanolett.6b05134
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Geng, X., Zhang, Y., Han, Y., Li, J., Yang, L., Benamara, M., Chen, L., & Zhu, H. (2017). Two-Dimensional Water-Coupled Metallic MoS2 with Nanochannels for Ultrafast Supercapacitors. Nano Letters. https://doi.org/10.1021/acs.nanolett.6b05134

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