1. Bilayered nanostructured V 2 O 5 nH 2 O xerogel constructed 2D nano-papers for efficient aqueous zinc/magnesium ion storage.
- Author
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He Q, Wang H, Bai J, Liao Y, Wang S, and Chen L
- Abstract
Aqueous zinc ion batteries (AZIBs) and aqueous magnesium ion batteries (AMIBs) offer powerful alternatives for large-scale energy storage because of their high safety and low cost. Consequently, the design of high-performance cathode materials is essential. In this paper, we present a simple strategy that combines oxygen defect (O
d ) engineering with a 2D-on-2D homogeneous nanopape-like bilayer V2 O5 nH2 O xerogel (BL-HVOd NPS). This strategy employs Od to improve Zn2+ /Mg2+ insertion/extraction kinetics and reduce irreversible processes for high-performance AZIBs/AMIBs. And interlayer water molecules serve as an effective spacer to stabilize the expanded interlayer gap in BL-HVOd NPS, thereby providing extended diffusion channels for Zn2+ /Mg2+ during insertion/extraction. The interlayer water molecules help shield the electrostatic interaction between Zn2+ /Mg2+ and BL-HVOd NPS lattice, which improves diffusion kinetics during repeated. In addition, electrochemical characterization results indicate that the BL-HVOd NPS can effectively the surface adsorption and internal diffusion of Zn2+ /Mg2+ . More importantly, the successfully prepared unique 2D-on-2D homogenous nanopaper structure enhances electrolyte/electrode contact and reduces the migration/diffusion path of electrons/Zn2+ and Mg2+ , thus greatly improving rate performance. As a result, the BL-HVOd NPS as AZIBs/AMIBs electrodes offer better reversible capacity of 361.8 and 162.8 mA h g-1 (at 0.2 A g-1 ), while displaying impressively long cycle lifes. This method provides a way to prepare advanced xerogel cathode materials for AZIBs and AMIBs., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
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