A direct approach to Zn pre-intercalated VO cathodes with superior electrochemical performance for aqueous zinc-ion batteries.

Chem Commun (Camb)

Sustainable Energy and Environmental Materials (SEEM) Lab, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Indore, Simrol, Indore 453552, India.

Published: July 2025


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Article Abstract

We report a simple and direct hydrothermal route to synthesize Zn-intercalated VO·HO using a zinc metal strip as the Zn source-a strategy not previously applied to vanadium oxides. This direct intercalation expands the interlayer spacing and enhances structural stability, delivering significantly improved capacity, rate performance, and cycling stability compared to most of the existing Zn-intercalated VO systems obtained by conventional approaches. Density Functional Theory (DFT) calculations reveal reduced band gap and increased electronic states near the Fermi level due to Zn-intercalation, confirming enhanced electronic conductivity. This work offers a novel design pathway toward high-performance cathodes for aqueous Zn-ion batteries.

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http://dx.doi.org/10.1039/d5cc02188jDOI Listing

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