Aqueous ZnÀ S battery with high energy density represents a promising large-scale energy storage technology, but its application is severely hindered by the poor reversibility of both S cathode and Zn anode. Herein, we develop a "cocktail optimized" electrolyte containing tetraglyme (G4) and water as cosolvents and I 2 as additive. The G4-I 2 synergy could activate efficient polar I 3 À /I À catalyst couple and shield the cathode from water, thus facilitating the conversion kinetics of S and suppressing the interfacial side reactions. Simultaneously, it could stabilize Zn anode by forming an organic-inorganic interphase upon cycling. With boosted electrodes reversibility, the ZnÀ S cell delivers a high capacity of 775 mAh g À 1 at 2 A g À 1 , and retains over 70 % capacity after 600 cycles at 4 A g À 1 .The advances can also be readily generalized to other ethers/water hybrid electrolytes, showing the universality of the "cocktail optimized" electrolyte design strategy.

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Electrolyte additives have been widely used to enhance the reversibility of Zn plating/stripping in aqueous electrolytes, but limited improvements have been gained under high current density and areal capacity. Here,...

Te‐based materials with excellent electrical conductivity and ultra‐high volume specific capacity have attracted much attention for the cost‐efficient aqueous Zn batteries. However, the construction of functional structures with mild volume expansion and suppressed shuttle effects, enabling an expanded lifespan, is still a challenge for conversion‐type materials. Herein, the carbon‐coated zinc telluride nanowires (ZnTe@C NWs) are rationally designed as a high‐performance cathode material for aqueous Zn batteries. The carbon‐coated1D nanostructure could not only provide optimized transmission path for electrons and ions, but also help to maintain structure integrity upon volume variation and suppress intermediates dissolution, endowing the ZnTe@C NWs with improved cycling stability and reaction kinetics. Consequently, a reversible six‐electron reaction mechanism of ZnTe@C NWs based on Te2−/Te4+ conversion with excellent output capacity (586 mAh g−1 at 0.1 A g−1) and lifespan (>250 mAh g−1 retained for 400 cycles at 1 A g−1) is eventually achieved.