Tailored ZnF2/ZnS-rich interphase for reversible aqueous Zn batteries

Reversible adsorption with oriented arrangement of a zwitterionic additive stabilizes electrodes for ultralong-life Zn-ion batteries

“…Then, the activation energy ( E a ) was tested to study the Zn 2+ transfer kinetics at the interface using the Arrhenius equation, which actually reflects the de-solvation ability. 25 It is closely correlated to the charge transfer resistance ( R ct ), which was obtained by electrochemical impedance spectroscopy (EIS) test at 20–60 °C (Fig. S14, S15 and Table.…”

Progress and Prospect of Zn Anode Modification in Aqueous Zinc-Ion Batteries: Experimental and Theoretical Aspects

“…Generally, Zn(OTf) 2 is selected as the electrolyte for AZIBs composed of vanadium-based cathodes. The Zn(OTf) 2 electrolyte can effectively inhibit the capacity attenuation of vanadium-based materials [ 75 , 76 , 77 ].…”

Interfacial Reconstruction for Regulating Zn2+ Deposition toward Ultrastable Zn Metal Anodes

“…To date, interfacial engineering is regarded as an effective strategy to modulate the electrode–electrolyte interface chemistry for protecting the Zn metal anode from dendrite growth and side reactions. − One is the utilization of functional electrolyte additives, in which the SEI layer on the Zn surface can be in situ derived from the decomposition of additives and/or solvents in the electrolyte. , The electrolyte additives can optimize the solvation structure of Zn 2+ in the electrolyte, improve ion/charge transfer kinetics, and construct an in situ SEI film to regulate the interfacial environment and Zn deposition. − Nonetheless, the thickness of the in situ-formed SEI by consumption of the electrolyte is difficult to be accurately controlled; thus, the SEI layer is inevitably damaged during the repeated Zn deposition/dissolution process, especially in the thin SEI layer, which will expose fresh Zn to the electrolyte and cause an increase of internal impedance and dendrite formation. − The other is constructing an artificial solid-electrolyte interfacial (SEI) layer by an ex situ coating route, such as ZnO, CaCO 3 , and ZnP, for isolating physical contact of the Zn anode with the electrolyte and inhibiting dendrite formation. Artificial SEI layers can effectively inhibit HER and surface corrosion and modulate Zn deposition behavior via restricting Zn nucleation sites and building an interface with high affinity and lattice matching toward Zn. − Therefore, designing a high-efficient SEI protection layer in a targeted manner to overcome critical drawbacks is urgently needed.…”