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Nano Research 2021, 14(11): 3854-3863 https://doi.org/10.1007/s12274-021-3305-3
Research Article | Issue | Published: 22 January 2021

Van der Waals heterostructure engineering by 2D space-confinement for advanced potassium-ion storage

Show Author's Information Bi Luo1,  Peng Wu2,  Jiafeng Zhang1( ),  Liang Cao1,  Chunhui Wang1,  Bin Lu3,  Bao Zhang1,  Xing Ou1( )
National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals School of Metallurgy and Environment Central South University Changsha 410083 China
Key Laboratory on Fuel Cell Technology of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 China
Institute of Advanced Magnetic Materials College of Materials & Environmental Engineering Hangzhou Dianzi University Hangzhou 310018 China
Keywords:
molybdenum disulfide, anode materials, van der Waals heterostructure, space confinement, potassium-ion batteries
Topics:
Amorphous carbon AnodesElectrolytesEnergy storageGrapheneIonsLayered semiconductorsNanosheetsPotassiumStorage (materials)Sulfur compoundsVan der Waals forces
Cite this article:
Luo B, Wu P, Zhang J, et al. Van der Waals heterostructure engineering by 2D space-confinement for advanced potassium-ion storage. Nano Research, 2021, 14(11): 3854-3863. https://doi.org/10.1007/s12274-021-3305-3
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Abstract Full text Electronic supplementary material About this article

Molybdenum disulfide (MoS2) has received enormous attentions in the electrochemical energy storage due to its unique two-dimensional layered structure and relatively high reversible capacity. However, the application of MoS2 in potassium-ion batteries (PIBs) is restricted by poor rate capability and cyclability, which are associated with the sluggish reaction kinetics and the huge volume expansion during K+ intercalation. Herein, we propose a two-dimensional (2D) space confined strategy to construct van der Waals heterostructure for superior PIB anode, in which the MoS2 nanosheets can be well dispersed on reduced graphene oxide nanosheets by leveraging the confinement effect within the graphene layers and amorphous carbon. The strong synergistic effects in 2D van der Waals heterostructure can extremely promote the electron transportation and ions diffusion during K+ insertion/extraction. More significantly, the 2D space-confinement effect and van der Waals force inhibit polysulfide conversion product dissolution into the electrolyte, which significantly strengthens the structural durability during the long-term cycling process. As anticipated, the as-synthesized the "face-to-face" C/MoS2/G anode delivers remarkable K-storage performance, especially for high reversible capacity (362.5 mAh·g-1 at 0.1 A·g-1), excellent rate capability (195.4 mAh·g-1 at 10 A·g-1) and superior ultrahigh-rate long-cycling stability (126.4 mAh·g-1 after 4000 cycles at high rate of 5 A·g-1). This work presents a promise strategy of structure designing and composition optimization for 2D layered materials in advanced energy storage application.


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About this article

Van der Waals heterostructure engineering by 2D space-confinement for advanced potassium-ion storage

Show Author's information Bi Luo1, Peng Wu2, Jiafeng Zhang1( ), Liang Cao1, Chunhui Wang1, Bin Lu3, Bao Zhang1, Xing Ou1( )
National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals School of Metallurgy and Environment Central South University Changsha 410083 China
Key Laboratory on Fuel Cell Technology of Guangdong Province School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510641 China
Institute of Advanced Magnetic Materials College of Materials & Environmental Engineering Hangzhou Dianzi University Hangzhou 310018 China

Abstract

Molybdenum disulfide (MoS2) has received enormous attentions in the electrochemical energy storage due to its unique two-dimensional layered structure and relatively high reversible capacity. However, the application of MoS2 in potassium-ion batteries (PIBs) is restricted by poor rate capability and cyclability, which are associated with the sluggish reaction kinetics and the huge volume expansion during K+ intercalation. Herein, we propose a two-dimensional (2D) space confined strategy to construct van der Waals heterostructure for superior PIB anode, in which the MoS2 nanosheets can be well dispersed on reduced graphene oxide nanosheets by leveraging the confinement effect within the graphene layers and amorphous carbon. The strong synergistic effects in 2D van der Waals heterostructure can extremely promote the electron transportation and ions diffusion during K+ insertion/extraction. More significantly, the 2D space-confinement effect and van der Waals force inhibit polysulfide conversion product dissolution into the electrolyte, which significantly strengthens the structural durability during the long-term cycling process. As anticipated, the as-synthesized the "face-to-face" C/MoS2/G anode delivers remarkable K-storage performance, especially for high reversible capacity (362.5 mAh·g-1 at 0.1 A·g-1), excellent rate capability (195.4 mAh·g-1 at 10 A·g-1) and superior ultrahigh-rate long-cycling stability (126.4 mAh·g-1 after 4000 cycles at high rate of 5 A·g-1). This work presents a promise strategy of structure designing and composition optimization for 2D layered materials in advanced energy storage application.

Keywords: molybdenum disulfide, anode materials, van der Waals heterostructure, space confinement, potassium-ion batteries

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Publication history
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Acknowledgements

Publication history

Received: 27 July 2020
Revised: 10 September 2020
Accepted: 25 December 2020
Published: 22 January 2021
Issue date: November 2021

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 51902347, 51822812, 51772334, and 51778627) and Natural Science Foundation of Hunan Province (No. 2020JJ5741).

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