Construction of Hierarchical Nanotubes Assembled from Ultrathin V3S4@C Nanosheets towards Alkali‐Ion Batteries with Ion‐Dependent Electrochemical Mechanisms. Issue 6 (3rd January 2020)

• Record Type: Journal Article
• Authors: Liu, Yang; Sun, Zehang; Sun, Xuan; Lin, Yue; Tan, Ke; Sun, Jinfeng; Liang, Longwei; Hou, Linrui; Yuan, Changzhou
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 6(2020)
• Page Start: 2473
• Page End: 2482
• Publication Date: 2020-01-03
• Subjects: alkali-ion batteries -- density functional calculations -- hierarchical nanotubes -- V3S4@C nanosheets; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201913343
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Ultrathin core–shell V3 S4 @C nanosheets assembled into hierarchical nanotubes (V3 S4 @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 V3 S4 @C NS‐HNTs electrode. The V3 S4 @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 V3 S4 ‐C interfaces. The resulting V3 S4 @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. Abstract : V3 S4 @C in the shell : Ultrathin core–shell V3 S4 @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.