Issue 20, 2021

A new tunnel-type V4O9 cathode for high power density aqueous zinc ion batteries

Abstract

A mixed valence V4O9 with a tunnel structure and room temperature metallic properties was prepared via partially reducing vanadium pentoxide. Its unique tunnel structure and metallic characteristics are beneficial for fast zinc ion and electron diffusion. A Zn//V4O9 battery displays a high rate performance of 234.4 mA h g−1 at 50C, a large reversible capacity of 420 mA h g−1 at 0.5C, and good cycling stability. The intercalation mechanism of Zn2+ and H+ is proved by in situ XRD, ex situ XPS, and other characterization techniques, along with density functional theory calculations. This work provides a strategy to improve the electrochemical performance of vanadium oxides through valence regulation.

Graphical abstract: A new tunnel-type V4O9 cathode for high power density aqueous zinc ion batteries

Supplementary files

Article information

Article type
Research Article
Submitted
11 6 2021
Accepted
11 8 2021
First published
13 8 2021

Inorg. Chem. Front., 2021,8, 4497-4506

A new tunnel-type V4O9 cathode for high power density aqueous zinc ion batteries

Q. Wang, T. Sun, S. Zheng, L. Li, T. Ma and J. Liang, Inorg. Chem. Front., 2021, 8, 4497 DOI: 10.1039/D1QI00747E

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