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Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries

Journal Article


Abstract


  • Structural engineering and creating atomic disorder in electrodes are promising strategies for highly efficient and rapid charge storage in advanced batteries. Herein, a nanohybrid architecture is presented with amorphous vanadium oxide conformally coated on layered V2C MXene (a-VOx/V2C) via tunable anodic oxidation, which exhibits a high reversible capacity of 307 mAh g���1 at 50��mA g���1, decent rate capability with capacity up to 96 mAh g���1 at 2000��mA g���1, and good cycling stability as a cathode for sodium-ion batteries. The a-VOx layer enables reversible and fast Na+ insertion/extraction by providing sufficient vacancies and open pathways in the amorphous framework, unlike the irreversible phase transition in its crystalline counterpart, while layered V2C MXene offers abundant electron/ion transfer channels, which are joined together to boost the electrochemical performance. Notably the improved reversibility and structural superiority of the a-VOx/V2C nanohybrid are clearly revealed by in situ Raman, in situ transmission electron microscopy, in situ synchrotron X-ray absorption spectroscopy, and density functional theory calculations, demonstrating a reversible V���O vibration and valence oscillation between V4+ and V5+ in the disordered framework, with robust structural stability and unobstructed Na+ diffusion. This work provides a meaningful reference for the elaborate design of MXene-based nanostructured electrodes toward advanced rechargeable batteries.

UOW Authors


  •   Yang, Huiling (external author)
  •   Peng, Jian (external author)
  •   Peng, Jian (external author)
  •   Chou, Shulei (external author)
  •   Lai, Weihong (external author)

Publication Date


  • 2021

Citation


  • Zhang, W., Peng, J., Hua, W., Liu, Y., Wang, J., Liang, Y., . . . Chou, S. L. (2021). Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries. Advanced Energy Materials, 11(22). doi:10.1002/aenm.202100757

Scopus Eid


  • 2-s2.0-85104744238

Volume


  • 11

Issue


  • 22

Place Of Publication


Abstract


  • Structural engineering and creating atomic disorder in electrodes are promising strategies for highly efficient and rapid charge storage in advanced batteries. Herein, a nanohybrid architecture is presented with amorphous vanadium oxide conformally coated on layered V2C MXene (a-VOx/V2C) via tunable anodic oxidation, which exhibits a high reversible capacity of 307 mAh g���1 at 50��mA g���1, decent rate capability with capacity up to 96 mAh g���1 at 2000��mA g���1, and good cycling stability as a cathode for sodium-ion batteries. The a-VOx layer enables reversible and fast Na+ insertion/extraction by providing sufficient vacancies and open pathways in the amorphous framework, unlike the irreversible phase transition in its crystalline counterpart, while layered V2C MXene offers abundant electron/ion transfer channels, which are joined together to boost the electrochemical performance. Notably the improved reversibility and structural superiority of the a-VOx/V2C nanohybrid are clearly revealed by in situ Raman, in situ transmission electron microscopy, in situ synchrotron X-ray absorption spectroscopy, and density functional theory calculations, demonstrating a reversible V���O vibration and valence oscillation between V4+ and V5+ in the disordered framework, with robust structural stability and unobstructed Na+ diffusion. This work provides a meaningful reference for the elaborate design of MXene-based nanostructured electrodes toward advanced rechargeable batteries.

UOW Authors


  •   Yang, Huiling (external author)
  •   Peng, Jian (external author)
  •   Peng, Jian (external author)
  •   Chou, Shulei (external author)
  •   Lai, Weihong (external author)

Publication Date


  • 2021

Citation


  • Zhang, W., Peng, J., Hua, W., Liu, Y., Wang, J., Liang, Y., . . . Chou, S. L. (2021). Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries. Advanced Energy Materials, 11(22). doi:10.1002/aenm.202100757

Scopus Eid


  • 2-s2.0-85104744238

Volume


  • 11

Issue


  • 22

Place Of Publication