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

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 rela...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2020-02, Vol.59 (6), p.2473-2482
Main Authors: Liu, Yang, Sun, Zehang, Sun, Xuan, Lin, Yue, Tan, Ke, Sun, Jinfeng, Liang, Longwei, Hou, Linrui, Yuan, Changzhou
Format: Article
Language:English
Subjects:
alkali-ion batteries
Anodes
Batteries
Crystal structure
density functional calculations
Diffusion
Durability
Electrochemistry
hierarchical nanotubes
Intercalation
Interfaces
Interlayers
Ion adsorption
Ion charge
Nanosheets
Nanotechnology
Nanotubes
Storage
V3S4@C nanosheets
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Summary: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. 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.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201913343