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

• DOI: 10.1002/anie.202218922
• Publication Date: 2023-02-03T13:51:46Z
• Authors: Meng Huang; Qiu He; Junjun Wang; Xiong Liu; Fangyu Xiong; Yu Liu; Ruiting Guo; Yan Zhao; Jinlong Yang; Liqiang Mai
• Keywords: 01 natural sciences; 0104 chemical sciences

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 transformation at interface. Herein, deprotonation of NH4+ introduced dissociation H2 O molecules provide sufficient H3 O+ insert into materials' structure energy storages are revealed. Lewis acidic ion-NH4+ can, on one hand itself via deprotonation, other hydrolyze with produce . In situ attenuated total reflection-Fourier transform infrared ray method probed accumulation , density functional theory calculations manifested that tend thermodynamically adsorb surface monoclinic VO2 deprotonate addition, inserted has positive effect stabilizing (B) structure. Therefore, high specific capacity (>300 mAh g-1 ) ionic insertion/extraction (<20 s) can be realized in anode. This derivation proposes new path designing proton mild electrolyte.