NH4+ Deprotonation at Interfaces Induced Reversible H3O+/NH4+ Co-insertion/Extraction

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

14 Scopus Citations
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Author(s)

  • Meng Huang
  • Qiu He
  • Junjun Wang
  • Xiong Liu
  • Fangyu Xiong
  • And 5 others
  • Yu Liu
  • Ruiting Guo
  • Yan Zhao
  • Jinlong Yang
  • Liqiang Mai

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article numbere202218922
Number of pages9
Journal / PublicationAngewandte Chemie - International Edition
Volume62
Issue number14
Online published3 Feb 2023
Publication statusPublished - 27 Mar 2023

Abstract

Ion insertions always involve electrode-electrolyte interface process, desolvation for instance, which determines the electrochemical kinetics. However, it′s still a challenge to achieve fast ion insertion and investigate ion transformation at interface. Herein, the interface deprotonation of NH4+ and the introduced dissociation of H2O molecules to provide sufficient H3O+ to insert into materials′ structure for fast energy storages are revealed. Lewis acidic ion-NH4+ can, on one hand provide H3O+ itself via deprotonation, and on the other hand hydrolyze with H2O molecules to produce H3O+. In situ attenuated total reflection-Fourier transform infrared ray method probed the interface accumulation and deprotonation of NH4+, and density functional theory calculations manifested that NH4+ tend to thermodynamically adsorb on the surface of monoclinic VO2, and deprotonate to provide H3O+. In addition, the inserted NH4+ has a positive effect for stabilizing the VO2(B) structure. Therefore, high specific capacity (>300 mAh g−1) and fast ionic insertion/extraction (<20 s) can be realized in VO2(B) anode. This interface derivation proposes a new path for designing proton ion insertion/extraction in mild electrolyte. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • Electrode-Electrolyte Interface, Energy Storage Mechanism, In Situ Characterization, Proton Insertion, Vanadium Dioxide

Citation Format(s)

NH4+ Deprotonation at Interfaces Induced Reversible H3O+/NH4+ Co-insertion/Extraction. / Huang, Meng; He, Qiu; Wang, Junjun et al.
In: Angewandte Chemie - International Edition, Vol. 62, No. 14, e202218922, 27.03.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review