Electrochemically formed ’-NaV2O5: A new sodium intercalation compound

Abstract

In this work the electrochemical behavior of α-V2O5 at RT, in a 1M NaClO4/ PC (propylene carbonate) electrolyte is investigated for the first time. The irreversible formation of a sodiated layered compound is shown from the first electrochemical discharge step. This electrochemically formed compound, with highly stable structure close to that of the high temperature α’-NaV2O5 orthorhombic bronze, is demonstrated to be a genuine sodium intercalation compound. This material exhibits a high capacity of 120 mAh g-1 available near 1.6 V at C/10 rate with a promising cycling behaviour. X-ray diffraction and Raman spectroscopy show zero strain structural behaviour during Na+ insertion/extraction in this large interlayer spacing material.  

IF: 4.8

DOI: 10.1016/j.electacta.2015.07.030