A novel vanadium coordination supramolecular network with multiple active sites for ultra-durable aqueous zinc metal batteries

Lai, Shimei; Tao, Zengren; Cui, Jiawei; Wang, Anding; Tan, Yuanming; Chen, Zhao; Yang, Yangyi

doi:10.1039/d3ta04414a

J. Mater. Chem. A

2023

DOI: 10.1039/d3ta04414a

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A novel vanadium coordination supramolecular network with multiple active sites for ultra-durable aqueous zinc metal batteries

Shimei Lai,

Zengren Tao,

Jiawei Cui

et al.

Abstract: A novel vanadium coordination supramolecular network was synthesized, and employed as the cathode for zinc metal batteries, and exhibit excellent rate performance and ultra-long cycle life.

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2024

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Controlled Heterovalent Vanadium Ion Coordinated Flower-Shaped Supramolecules Cathode for Zinc-Ion Storage

Lu,

Han,

Zheng

et al. 2024

ACS Appl. Mater. Interfaces

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Vanadium-based materials, which offer multiple oxidation states and rich redox reactions in zinc-ion batteries (ZIBs), have gained substantial attention. However, achieving green and efficient preparation of vanadium oxides-based materials featured with a controlled content of different heterovalent vanadium remains a significant challenge. Herein, a vanadium-supramolecular flower-shaped material (VSF) with heterovalent vanadium was prepared using NH 4 VO 3 as vanadium metal center and hexamethylenetetramine as organic ligand in aqueous solution. The optimal ratio of material (PVSF) after controlling VSF presintering is 2/ 1 (V 5+ /V 4+ ). Employing PVSF-2/1 as cathode in ZIBs can achieve a high specific capacity of 398.9 mAh g −1 at 0.2 A g −1 , which is increased by 0.2 and 3.5 times as compared with that of pure VO 2 and V 2 O 5 , respectively. After 2000 cycles, it still delivers a specific capacity of 225 mAh g −1 at 5.0 A g −1 . The Zn∥PVSF-2/1 pouch cells were assembled with a satisfactory specific capacity of 339 mAh g −1 at a current of 0.2 A g −1 . The excellent performance is ascribed to regulation and coordinated promotion of heterovalent states. The structural pathways corresponding to V 5+ act as Zn 2+ transport channels to increase Zn 2+ transport capability. The V 4+ cause high charge density distribution of the V-O lattice layer to provide abundant active sites for the adsorption/desorption process of Zn 2+ .

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Controlled Heterovalent Vanadium Ion Coordinated Flower-Shaped Supramolecules Cathode for Zinc-Ion Storage

Lu,

Han,

Zheng

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

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A novel vanadium coordination supramolecular network with multiple active sites for ultra-durable aqueous zinc metal batteries

Abstract: A novel vanadium coordination supramolecular network was synthesized, and employed as the cathode for zinc metal batteries, and exhibit excellent rate performance and ultra-long cycle life.

Cited by 1 publication

References 61 publications

Controlled Heterovalent Vanadium Ion Coordinated Flower-Shaped Supramolecules Cathode for Zinc-Ion Storage

Controlled Heterovalent Vanadium Ion Coordinated Flower-Shaped Supramolecules Cathode for Zinc-Ion Storage

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