Electrochemical Mechanism of V2O5 Film on Storing Zn2+ Ions in Zn-Ion Battery System
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Abstract
In this research, we characterized the morphology of V2O5 particles purchased from Sigma- Aldrich by scanning electron microscopy (SEM) . The V2O5 particles have a rod- like structure with a length and width of about 1.05 µm and 0.28 µm, respectively. X- ray diffraction spectrum of V2O5 powder indicates the orthorhombic V2O5 structure. The electrochemical property of the V2O5 film coated on Ni foam was tested by cyclic voltammetry (CV), and the oxidation and reduction peaks were clearly observed. The capacity of the Zn-ion battery based on the V2O5 cathode is 47.86 mAh g -1 under the current density of 50 mA g -1. EDX mapping analysis suggests that the charging/discharging processes would extract/insert the Zn2+ out/in the V2O5 film, respectively.
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