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Rechargeable aqueous Zn-ion batteries (ZIBs) have drawn incredible attentions recently due to their high energy density, low cost and intrinsic safety. However, the water attack that consistently corrode the Zn anode surface with the notorious dendrite growth, hydrogen evolution and inactive by-product formation seriously impedes the practical applications of ZIBs. Here, we design a bio-inspired electrolyte (DE) with tetraethyl orthosilicate additive as a “healing agent” to dynamically repair the Zn surface wound. The results reveal that the DE not only enables an in-situ formed zincophilic layer to promote the uniform Zn deposition, but also alters the Zn2+ solvation chemistry to suppress water-induced side reactions. Consequently, the Zn|Zn cells with DE harvests an ultralong life of 6000 h at 0.5 mA cm-2 and 0.5 mAh cm-2 and 830 h even at a high depth of discharge of 80%. Furthermore, the Zn/V2O5 battery retains 93.15% of the initial capacity after 1000 cycles at 1 A g–1 with a low N/P ratio (2.0), lean electrolyte (20 μL mAh–1), and a high-capacity cathode (2.9 mAh cm-2). This work presents a fresh strategy to the development of high-performance ZIBs.
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