Electrochemical Activity of Electrodeposited V₂O₅Coatings

Abstract

Vanadium oxide microcrystallites are electrodeposited at room temperature. The effect of the deposition current density on the structural, morphological and electrochemical properties of the coatings is studied. The electrochemical activity of the material is found to improve with the deposition current density utilized during electrodeposition. At the highest deposition current values, marked amounts of lithium charge are observed to interchange with the material owing to the increased coverage of its structure. The highest specific capacitance of 145 F g −1 measured in 1 M LiClO 4 is comparable to previously reported values using different electrolytes such as NaCl, LiCl and KCl.

Electrodeposition of Vanadium Oxides at Room Temperature as Cathodes in Lithium-Ion Batteries

“…The materials characteristics can be controlled by varying the electrodeposition conditions [15,16] such as current density, time, and electrolyte concentration. In this work, V 2 O 5 electrodes, without carbon or polymeric binders and metals, were obtained at room temperature from a solution of vanadyl (III) acetyl acetonate (VO(acac) 3 ) in methanol (CH 3 OH) varying the concentration and the current density.…”

Facile hydrothermal synthesis of ultrahigh-aspect-ratio V2O5 nanowires for high-performance supercapacitors

“…This is due to its low cost, layered structure (good for Li-ion diffusion), mixed oxidation states (V 2þ , V 3þ , V 4þ and V 5þ , enabling redox reactions) and high specific capacity [19]. In recent years, vanadium oxides have been synthesized by various methods: microwave-assisted hydrothermal [20], coprecipitation [21], electrospinning [22], electrodeposited [23], solegel [24]. In addition, it easily knows that vanadium oxide with nano structure shows better capacitive property than massive vanadium oxide according to the charge storage mechanism.…”

Oxygen source-Oriented Control of APCVD VO2 for Capacitive Applications

“…Cyclic voltammetry experiments were performed using a three electrode electrochemical cell as reported previously [32][33][34] for a potential range of -1 V to +1 V, a scan rate of 10 mV s -1 and a number of scans up to 1000. In particular, Pt, Ag/AgCl and vanadium oxides on SnO 2 -precoated glass substrates were used as counter, reference and working electrodes, respectively.…”