Volume 59, Issue 6 pp. 2473-2482
Research Article

Construction of Hierarchical Nanotubes Assembled from Ultrathin V3S4@C Nanosheets towards Alkali-Ion Batteries with Ion-Dependent Electrochemical Mechanisms

Dr. Yang Liu

Dr. Yang Liu

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

Theses authors contributed equally to this work.

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Zehang Sun

Zehang Sun

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

Theses authors contributed equally to this work.

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Dr. Xuan Sun

Dr. Xuan Sun

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

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Dr. Yue Lin

Corresponding Author

Dr. Yue Lin

Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026 P. R. China

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Ke Tan

Ke Tan

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

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Dr. Jinfeng Sun

Dr. Jinfeng Sun

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

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Dr. Longwei Liang

Dr. Longwei Liang

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

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Prof. Linrui Hou

Prof. Linrui Hou

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

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Prof. Changzhou Yuan

Corresponding Author

Prof. Changzhou Yuan

School of Materials Science & Engineering, University of Jinan, Jinan, 250022 P. R. China

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First published: 02 December 2019
Citations: 233

Graphical Abstract

V3S4@C in the shell: Ultrathin core–shell V3S4@C nanosheets assembled into hierarchical nanotubes are synthesized for alkali-ion batteries. Alkali-ion-dependent charge storage mechanisms are put forward with systematic in situ/ex situ structural/physicochemical characterizations and DFT calculations.

Abstract

Ultrathin core–shell V3S4@C nanosheets assembled into hierarchical nanotubes (V3S4@C NS-HNTs) are synthesized by a self-template strategy and evaluated as general anodes for alkali-ion batteries. Structural/physicochemical characterizations and DFT calculations bring insights into the intrinsic relationship between crystal structures and electrochemical mechanisms of the V3S4@C NS-HNTs electrode. The V3S4@C NS-HNTs are endowed with strong structural rigidness owing to the layered VS2 subunits and interlayer occupied V atoms, and efficient alkali-ion adsorption/diffusion thanks to the electroactive V3S4-C interfaces. The resulting V3S4@C NS-HNTs anode exhibit distinct alkali-ion-dependent charge storage mechanisms and exceptional long-durability cyclic performance in storage of K+, benefiting from synergistic contributions of pseudocapacitive and reversible intercalation/de-intercalation behaviors superior to those of the conversion-reaction-based Li+-/Na+-storage counterparts.

Conflict of interest

The authors declare no conflict of interest.

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