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Structure evolution and energy storage mechanism of Zn3V3O8 spinel in aqueous zinc batteries

Authors :
Changjian Zuo
Feng Pan
Lin Zhou
Shouxiang Ding
Lu Yao
Hengyu Ren
Yang Li
Haocong Yi
Qinghe Zhao
Shunning Li
Yuetao Wang
Runzhi Qin
Wenguang Zhao
Source :
Nanoscale. 13:14408-14416
Publication Year :
2021
Publisher :
Royal Society of Chemistry (RSC), 2021.

Abstract

Spinel-type materials are promising for the cathodes in rechargeable aqueous zinc batteries. Herein, Zn3V3O8 is synthesized via a simple solid-state reaction method. By tuning the Zn(CF3SO3)2 concentration in electrolytes and the cell voltage ranges, improved electrochemical performance of Zn3V3O8 can be achieved. The optimized test conditions give rise to progressive structure evolution from bulk to nano-crystalline spinel, which leads to capacity activation in the first few cycles and stable cycling performance afterward. Furthermore, the energy storage mechanism in this nano-crystalline spinel is interpreted as the co-intercalation of zinc ions and protons with some water. This work provides a new viewpoint of the structure evolution and correlated energy storage mechanism in spinel-type host materials, which would benefit the design and development of next-generation batteries.

Details

ISSN :
20403372 and 20403364
Volume :
13
Database :
OpenAIRE
Journal :
Nanoscale
Accession number :
edsair.doi...........1b45848679f62c3db396f9b0e58c9562