Abstract
Aqueous zinc-ion batteries (AZIBs) have been widely studied due to their high theoretical capacity, green safety, and low production cost. However, passivation, dendrite growth and corrosion of Zn anode are crucial drawbacks that hindering the application of AZIBs. Herein, Zn-based magadiite (Mag) layered nanosheets are developed as a multifunctional protective coating layer on Zn metal surface (Mag-Zn). The Mag-Zn layer can act as a physical isolation for anticorrosion and mitigating hydrogen evolution. More importantly, systematic characterizations and electrochemical analyses indicate the negative-charged enriched interlayer environment as well as the multiple Si–OH bonds not only repel the sulfate anions for restraining the by-product formation but also tailor the Zn ions transport flux with optimized kinetics and reduced the desolvation activation energy for inducing dendrite-free Zn deposition. Therefore, the Mag-Zn exhibits stable plating/stripping performance for 1500 h even at 10 mA cm−2, 1 mAh cm−2. In addition, the NaV3O8·1.5H2O (NVO)||Mag-Zn battery shows a stable voltage curve and maintained a good capacity for 2000 cycles at 10A g−1, suggesting the practical application of this facile and cost-effective Zn-based Mag coating layer on Zn anode protection.
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