Rechargeable Aqueous Zinc-Ion Battery Based on Porous Framework Zinc Pyrovanadate Intercalation Cathode

Chuan Xia; Jing Guo; Yongjiu Lei; Hanfeng Liang; Chao Zhao; Husam N Alshareef

doi:10.1002/adma.201705580

Rechargeable Aqueous Zinc-Ion Battery Based on Porous Framework Zinc Pyrovanadate Intercalation Cathode

Adv Mater. 2018 Feb;30(5). doi: 10.1002/adma.201705580. Epub 2017 Dec 11.

Authors

Chuan Xia¹, Jing Guo¹, Yongjiu Lei¹, Hanfeng Liang¹, Chao Zhao¹, Husam N Alshareef¹

Affiliation

¹ Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.

PMID: 29226488
DOI: 10.1002/adma.201705580

Abstract

In this work, a microwave approach is developed to rapidly synthesize ultralong zinc pyrovanadate (Zn₃ V₂ O₇ (OH)₂ ·2H₂ O, ZVO) nanowires with a porous crystal framework. It is shown that our synthesis strategy can easily be extended to fabricate other metal pyrovanadate compounds. The zinc pyrovanadate nanowires show significantly improved electrochemical performance when used as intercalation cathode for aqueous zinc-ion battery. Specifically, the ZVO cathode delivers high capacities of 213 and 76 mA h g^-1 at current densities of 50 and 3000 mA g^-1 , respectively. Furthermore, the Zn//ZVO cells show good cycling stability up to 300 cycles. The estimated energy density of this Zn cell is ≈214Wh kg^-1 , which is much higher than commercial lead-acid batteries. Significant insight into the Zn-storage mechanism in the pyrovanadate cathodes is presented using multiple analytical methods. In addition, it is shown that our prototype device can power a 1.5 V temperature sensor for at least 24 h.

Keywords: aqueous batteries; cathodes; pyrovanadate; zinc-ion batteries.