Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 24, Pages 9377-9381Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202001844
Keywords
metal-organic frameworks (MOFs); super-saturated electrolyte; zinc batteries; zinc electrodeposition
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Funding
- National Natural Science Foundation of China [21633003, 21673166, u1801252] Funding Source: Medline
- National Key Research and Development Program of China [2016YFB0100203] Funding Source: Medline
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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 MnO2-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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