Issue 5, 2020

NH4V3O8·0.5H2O nanobelts with intercalated water molecules as a high performance zinc ion battery cathode

Abstract

Aqueous rechargeable Zn-ion batteries (ARZIBs) have been attracting huge attention recently, where V-based materials with host layer structures and fast channels enable the efficient diffusion of metal ions, leading to excellent properties of Zn2+ storage. Several ammonium vanadates have been explored as potential cathodes, and their performance in ARZIBs varies considerably. Herein, we choose H2O-intercalated NH4V3O8 (NH4V3O8·0.5H2O) nanobelts, which are synthesized by a low-temperature hydrothermal process, and reveal that the electrochemical performance of NH4V3O8 is strongly enhanced by the H2O molecules intercalated in the layer structure. Indeed, the NH4V3O8·0.5H2O nanobelts exhibit a super-high capacity of 423 mA h g−1 at 0.1 A g−1, together with long-term stability (50.1% retention after 1000 cycles) at 1 A g−1. The Zn//NH4V3O8·0.5H2O battery thus assembled delivers a high energy density of 353 W h kg−1 at a power density of 114 W kg−1, comparing favorably with most of the state-of-the-art V-based cathode materials reported for ARZIBs. As a promising cathode candidate for aqueous batteries, the reversible (de)intercalation of Zn2+ in the H2O-intercalated NH4V3O8·0.5H2O gives rise to the formation of Zn3(OH)2V2O7·2H2O, which helps retain the desired long-term stability.

Graphical abstract: NH4V3O8·0.5H2O nanobelts with intercalated water molecules as a high performance zinc ion battery cathode

Supplementary files

Article information

Article type
Research Article
Submitted
03 2 2020
Accepted
22 2 2020
First published
24 2 2020

Mater. Chem. Front., 2020,4, 1434-1443

NH4V3O8·0.5H2O nanobelts with intercalated water molecules as a high performance zinc ion battery cathode

H. Jiang, Y. Zhang, Z. Pan, L. Xu, J. Zheng, Z. Gao, T. Hu, C. Meng and J. Wang, Mater. Chem. Front., 2020, 4, 1434 DOI: 10.1039/D0QM00051E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements