Issue 47, 2022

Constructing an Al2O3/(NH4)2V4O9 heterostructure as a cathode material for high performance aqueous rechargeable zinc ion batteries

Abstract

An Al2O3/(NH4)2V4O9 heterostructure is fabricated as a cathode material for aqueous rechargeable zinc ion batteries. This is the first report that Al2O3 assists (NH4)2V4O9 to improve the electrochemical performance of zinc-ion batteries. The Al2O3 content in the Al2O3/(NH4)2V4O9 heterostructure can be controlled by adjusting the ratio of Al : V, and the Al2O3/(NH4)2V4O9 nanoblocks with an Al2O3 content of 15.98% deliver excellent electrochemical performance with a maximum discharge capacity of 269 mAh g−1 at a current density of 0.5 A g−1. At a high current density of 5.0 A g−1, the Al2O3/(NH4)2V4O9 cathode displays an activated maximum capacity of 200 mA h g−1, and the specific capacity can be maintained at 173 mAh g−1 with a maximum capacity retention of 86.5% after 3000 cycles. The excellent electrochemical performance mainly come from the internal electronic field at the heterointerfaces in the Al2O3/(NH4)2V4O9 heterostructure.

Graphical abstract: Constructing an Al2O3/(NH4)2V4O9 heterostructure as a cathode material for high performance aqueous rechargeable zinc ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
28 Aug 2022
Accepted
20 Oct 2022
First published
20 Oct 2022

CrystEngComm, 2022,24, 8248-8255

Constructing an Al2O3/(NH4)2V4O9 heterostructure as a cathode material for high performance aqueous rechargeable zinc ion batteries

L. Zhang, L. Hou, R. Sheng, D. Li, Y. Gu and L. Wang, CrystEngComm, 2022, 24, 8248 DOI: 10.1039/D2CE01178F

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