Issue 65, 2024

Mg ions intercalated with V3O7·H2O to construct ultrastable cathode materials for aqueous zinc-ion batteries

Abstract

V3O7·H2O (VO) stands out as a highly promising cathode material for aqueous zinc-ion batteries (AZIB). However, due to the instability of the VO structure and the limited ion transport rate, achieving the required specific capacity and extended cycling lifespan has been challenging. To tackle this issue, we synthesized Mg-ion intercalated VO (MgVO) using a straightforward hydrothermal method. Introducing Mg2+ as an interlayer support enhanced the flexibility of MgVO within the confined layer space, stabilized its lamellar structure, and expanded the VO layer spacing. The AZIB employing the MgVO cathode demonstrated a high specific capacity of 382.7 mA h g−1 at a current density of 0.1 A g−1 and showed excellent cycling stability. The robust structural stability of MgVO suggests promising applications for large-scale energy storage, while the Mg2+ intercalation strategy presents a novel approach for exploring other potential cathode materials.

Graphical abstract: Mg ions intercalated with V3O7·H2O to construct ultrastable cathode materials for aqueous zinc-ion batteries

Supplementary files

Article information

Article type
Communication
Submitted
29 Kho 2024
Accepted
18 Maw 2024
First published
19 Maw 2024

Chem. Commun., 2024,60, 8597-8600

Mg ions intercalated with V3O7·H2O to construct ultrastable cathode materials for aqueous zinc-ion batteries

Y. Shi, B. Yin, Y. Sun, R. Ge, Y. Hu, J. Li, H. Li, S. Zhang and T. Ma, Chem. Commun., 2024, 60, 8597 DOI: 10.1039/D4CC03201B

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