摘要
Aqueous alkaline zinc batteries have received widespread attention owing to its higher electrode potential and faster reaction kinetics compared to in mild aqueous electrolyte.However,Zn metal anode in alkaline electrolyte usually suffers more severe corrosion,passivation,and hydrogen evolution reaction.Herein,an interface chemical regulation strategy employs to in-situ construct a Zn-Sn alloy layer during cycling.The K_(2)[Sn(OH)_(6)]has been introduced into the electrolyte as the deposition overpotential of Zn and Sn in alkaline electrolyte is approximate leading to their simultaneously plating.The Zn-Sn alloy layer not only prevents Zn anode corrosion and suppresses the dendrite growth but also promotes the reaction kinetics.Therefore,the Zn||Zn cell exhibits a long life of 400 h in alkaline electrolyte about 20 times of that in without K_(2)[Sn(OH)_(6)]electrolyte.Moreover,the N-NCP@PQ_(x)||Zn full cell displays a superior cycle performance of 4000 cycles with 93%capacity retention at 2 A/g.
基金
supported by Joint Funds of the National Natural Science Foundation of China(No.U22A20140)
University of Jinan Disciplinary Cross-Convergence Construction Project 2023(No.XKJC-202309)
Jinan City-School Integration Development Strategy Project(No.JNSX2023015)
Independent Cultivation Program of Innovation Team of Ji’nan City(No.202333042)
the Youth Innovation Group Plan of Shandong Province(No.2022KJ095)
Special thanks to the Optical microscopy(Yuescope,YM710R).
