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Constructing a Super‐Saturated Electrolyte Front Surface for Stable Rechargeable Aqueous Zinc Batteries
Author(s) -
Yang Huijun,
Chang Zhi,
Qiao Yu,
Deng Han,
Mu Xiaowei,
He Ping,
Zhou Haoshen
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202001844
Rechargeable aqueous zinc batteries (RAZB) have been re‐evaluated because of the superiority in addressing safety and cost concerns. Nonetheless, the limited lifespan arising from dendritic electrodeposition of metallic Zn hinders their further development. Herein, a metal–organic framework (MOF) was constructed as front surface layer to maintain a super‐saturated electrolyte layer on the Zn anode. Raman spectroscopy indicated that the highly coordinated ion complexes migrating through the MOF channels were different from the solvation structure in bulk electrolyte. Benefiting from the unique super‐saturated front surface, symmetric Zn cells survived up to 3000 hours at 0.5 mA cm −2 , near 55‐times that of bare Zn anodes. Moreover, aqueous MnO 2 –Zn batteries delivered a reversible capacity of 180.3 mAh g −1 and maintained a high capacity retention of 88.9 % after 600 cycles with MnO 2 mass loading up to 4.2 mg cm −2 .

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