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Nano Research 2019, 12(8): 1912-1920 https://doi.org/10.1007/s12274-019-2458-9
Research Article | Issue | Published: 18 June 2019

Porous-hollow nanorods constructed from alternate intercalation of carbon and MoS2 monolayers for lithium and sodium storage

Show Author's Information Laiying Jing1,  Gang Lian1( ),  Junru Wang2,  Mingwen Zhao2,  Xizheng Liu3,  Qilong Wang4,  Deliang Cui1,  Ching-Ping Wong5( )
State Key Lab of Crystal Materials,Shandong University,Jinan,250100,China;
School of Physics,Shandong University,Jinan,250100,China;
Tianjin Key Laboratory of Advanced Functional Porous Materials,Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology,Tianjin,300384,China;
Key Laboratory for Special Functional Aggregated Materials of Education Ministry,School of Chemistry and Chemical Engineering, Shandong University,Jinan,250100,China;
School of Materials Science and Engineering,Georgia Institute of Technology,Atlanta, Georgia,30332,USA;
Keywords:
ultrathin nanosheets, lithium/sodium ion batteries, porous-hollow nanorods, expanded interlayer spacing, alternate intercalation
Topics:
CarbonDoping (additives)Electric conductivityIon batteriesLayered semiconductorsLithiumMetal ionsMonolayersNanorodsNanosheetsSodium
Cite this article:
Jing L, Lian G, Wang J, et al. Porous-hollow nanorods constructed from alternate intercalation of carbon and MoS2 monolayers for lithium and sodium storage. Nano Research, 2019, 12(8): 1912-1920. https://doi.org/10.1007/s12274-019-2458-9
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Abstract Full text Electronic supplementary material About this article

Weak ion diffusion and electron transport due to limited interlayer spacing and poor electrical conductivity have been identified as critical roadbacks for fast and abundant energy storage of both MoS2-based lithium ion batteries (LIBs) and sodium ion batteries (SIBs). In this work, MoS2 porous-hollow nanorods (MoS2/m-C800) have been designed and synthesized via an annealing-followed chemistry-intercalated strategy to solve the two issues. They are uniformly assembled from ultrathin MoS2 nanosheets, deviated to the rod-axis direction, with expanded interlayer spacing due to alternate intercalation of N-doped carbon monolayers between the adjacent MoS2 monolayers. Electrochemical studies of the MoS2/m-C800 sample, as an anode of LIBs, demonstrate that the superstructure can deliver a reversible discharge capacity of 1, 170 mAh·g-1 after 100 cycles at 0.2 A·g-1 and maintain a reversible capacity of 951 mAh·g-1 at 1.25 A·g-1 after 350 cycles. While for SIBs, the superstructure also delivers a reversible discharge capacity of 350 mAh·g-1 at 0.5 A·g-1 after 500 cycles and exhibits superior rate capacity of 238 mAh·g-1 at 15 A·g-1.The excellent electrochemical performance is closely related with the hierarchical superstructures, including expanded interlayer spacing, alternate intercalation of carbon monolayers and mesoporous feature, which effectively reduce ion diffusion barrier, shorten ion diffusion paths and improve electrical conductivity.


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Electronic supplementary material
About this article

Porous-hollow nanorods constructed from alternate intercalation of carbon and MoS2 monolayers for lithium and sodium storage

Show Author's information Laiying Jing1, Gang Lian1( ), Junru Wang2, Mingwen Zhao2, Xizheng Liu3, Qilong Wang4, Deliang Cui1, Ching-Ping Wong5( )
State Key Lab of Crystal Materials,Shandong University,Jinan,250100,China;
School of Physics,Shandong University,Jinan,250100,China;
Tianjin Key Laboratory of Advanced Functional Porous Materials,Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology,Tianjin,300384,China;
Key Laboratory for Special Functional Aggregated Materials of Education Ministry,School of Chemistry and Chemical Engineering, Shandong University,Jinan,250100,China;
School of Materials Science and Engineering,Georgia Institute of Technology,Atlanta, Georgia,30332,USA;

Abstract

Weak ion diffusion and electron transport due to limited interlayer spacing and poor electrical conductivity have been identified as critical roadbacks for fast and abundant energy storage of both MoS2-based lithium ion batteries (LIBs) and sodium ion batteries (SIBs). In this work, MoS2 porous-hollow nanorods (MoS2/m-C800) have been designed and synthesized via an annealing-followed chemistry-intercalated strategy to solve the two issues. They are uniformly assembled from ultrathin MoS2 nanosheets, deviated to the rod-axis direction, with expanded interlayer spacing due to alternate intercalation of N-doped carbon monolayers between the adjacent MoS2 monolayers. Electrochemical studies of the MoS2/m-C800 sample, as an anode of LIBs, demonstrate that the superstructure can deliver a reversible discharge capacity of 1, 170 mAh·g-1 after 100 cycles at 0.2 A·g-1 and maintain a reversible capacity of 951 mAh·g-1 at 1.25 A·g-1 after 350 cycles. While for SIBs, the superstructure also delivers a reversible discharge capacity of 350 mAh·g-1 at 0.5 A·g-1 after 500 cycles and exhibits superior rate capacity of 238 mAh·g-1 at 15 A·g-1.The excellent electrochemical performance is closely related with the hierarchical superstructures, including expanded interlayer spacing, alternate intercalation of carbon monolayers and mesoporous feature, which effectively reduce ion diffusion barrier, shorten ion diffusion paths and improve electrical conductivity.

Keywords: ultrathin nanosheets, lithium/sodium ion batteries, porous-hollow nanorods, expanded interlayer spacing, alternate intercalation

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Publication history
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Acknowledgements

Publication history

Received: 19 March 2019
Revised: 17 May 2019
Accepted: 05 June 2019
Published: 18 June 2019
Issue date: August 2019

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51872172), Natural Science Foundation of Shandong Province (Nos. ZR2018MEM010 and ZR2019MEM021), Major Research and Development Program for Public Welfare in Shandong (No. 2018GGX102021) and Young Scholars Program of Shandong University.

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