Tetragonal VO2 hollow nanospheres as robust cathode material for aqueous zinc ion batteries

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

2 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Article number100431
Number of pages7
Journal / PublicationMaterials Today Energy
Volume17
Online published15 May 2020
Publication statusOnline published - 15 May 2020

Abstract

The emerging aqueous zinc ion batteries (ZIBs) are one of the alternatives to lithium ion batteries (LIBs) because zinc electrode possesses low equilibrium potential, high exchange current density and high hydrogen evolution overpotential. Nevertheless, they are still challenging on improving the cycle stability and compatibility with electrolytes. Herein, we report VO2-5@ PPy hollow nanospheres consisting of many nanosheets as cathode materials for ZIBs. The spaces between nanospheres facilitate transmission of Zn ions and make electrode tolerate high volume change. The as-obtained material delivers a specific capacity of 440 mAh g−1 at 0.1 A g−1. Also, they remain a reversible capacity of 143 mAh g−1 after 860 cycles at 1 A g−1.

Research Area(s)

  • Cathode electrode, Cycling stability, Hollow spheres, Metal ion battery, Vanadium oxide