Rechargeable aqueous zinc batteries are promising for large-scale energystorage due to their low cost and high safety;however,their energydensity has reached the ceiling based on conventional cathodes with asingle cat...Rechargeable aqueous zinc batteries are promising for large-scale energystorage due to their low cost and high safety;however,their energydensity has reached the ceiling based on conventional cathodes with asingle cationic redox reaction mechanism.Herein,a highly reversiblecathode of typical layered vanadium oxide is reported,which operates onboth the cationic redox couple of v^(5+)/v^(3+)accompanied by the Zn^(2+)storage and the anionic O^(-)/O^(2-)redox couple by anion hosting in anaqueous deep eutectic solvent electrolyte.The reversible oxygen redoxdelivers an additional capacity of-100 mAh g^(-1)at an operating voltage of~1.80 V,which increases the energy density of the cathode by~36%endowing the cathode system a record high energy density of~506 Whkg^(-1).The findings highlight new opportunities for the design of high-energy zinc batteries with both Zn^(2+)and anions as charge carriers.展开更多
基金Science Research Project of Hebei Education Department,Grant/Award Number:BJK2022033Hebei Province Foundation for Returned Talent,Grant/Award Number:C20210322+4 种基金National Natural Science Foundation of China,Grant/Award Numbers:52371239,52201282Natural Science Foundation of Hebei Province,Grant/Award Number:C2022203003China Postdoctoral Science Foundation,Grant/Award Number:2023M742945Hebei Provincial Postdoctoral Science Foundation,Grant/Award Number:B2023003023Subsidy for Hebei Key Laboratory of Applied Chemistry after Operation Performance,Grant/Award Number:22567616H
文摘Rechargeable aqueous zinc batteries are promising for large-scale energystorage due to their low cost and high safety;however,their energydensity has reached the ceiling based on conventional cathodes with asingle cationic redox reaction mechanism.Herein,a highly reversiblecathode of typical layered vanadium oxide is reported,which operates onboth the cationic redox couple of v^(5+)/v^(3+)accompanied by the Zn^(2+)storage and the anionic O^(-)/O^(2-)redox couple by anion hosting in anaqueous deep eutectic solvent electrolyte.The reversible oxygen redoxdelivers an additional capacity of-100 mAh g^(-1)at an operating voltage of~1.80 V,which increases the energy density of the cathode by~36%endowing the cathode system a record high energy density of~506 Whkg^(-1).The findings highlight new opportunities for the design of high-energy zinc batteries with both Zn^(2+)and anions as charge carriers.
