Preparation and properties of crystalline and amorphous vanadium pentoxide

Electrodeposition of Vanadium Oxide/Manganese Oxide Hybrid Thin Films on Nanostructured Aluminum Substrates

“…This catalytic (i.e. EC i ) model is in good agreement with previous findings 21,22 as well as the fact that the thermodynamically required potential for oxidation of water is +0.87 V (vs. Ag/AgCl) at pH 2.7 whereas the oxidation was carried out at a potential of +1 V (vs. Ag/AgCl). According to this hypothesis, the steady state current would hence be controlled by the rate by which V IV is regenerated via reaction 10.…”

“…Since this most likely is due to the aluminum corrosion taking place in the acidic solutions generally employed in the depositions, [21][22][23][24] it is clear that the development of an all-electrochemical process for the manufacturing of vanadium oxide coated 3D aluminum substrates represents a significant challenge. This means that electrodeposition of vanadium oxide on aluminum microrods can serve as an excellent model system for the development of new approaches for electrochemical modification of aluminum substrates.…”

“…24 Although vanadium oxide has been electrodeposited on substrates such as platinum-coated quartz, 24 graphite rods, 25 indium tin oxide (ITO) 26 and polycarbonate membranes sputtered with Au-Pd, 27 we are not aware of any successful depositions on aluminum electrodes. Since this most likely is due to the aluminum corrosion taking place in the acidic solutions generally employed in the depositions, [21][22][23][24] it is clear that the development of an all-electrochemical process for the manufacturing of vanadium oxide coated 3D aluminum substrates represents a significant challenge. This means that electrodeposition of vanadium oxide on aluminum microrods can serve as an excellent model system for the development of new approaches for electrochemical modification of aluminum substrates.…”

“…16,18 In a 3D Li-ion microbattery, a thin layer vanadium oxide could be used as a cathode material if such a layer could be successfully electrodeposited on a nanostructured Al substrate. Although other techniques including ALD, 19 sputtering, 20 chemical vapor deposition 21 and sol-gel techniques 22 have been employed to deposit vanadium oxide films, these methods are generally associated with complicated approaches and high processing costs when applied to the preparation of nanostructured electrodes. In this scenario, electrodeposition stands out as a simple and elegant method to synthesize vanadium oxides with precise control of the microstructure, surface morphology and homogeneity of the deposited oxide films.…”

Physical property exploration of highly oriented V2O5 thin films prepared by electron beam evaporation

“…The increase in dislocation density and microstrain values with the film thickness may be due to the strain induced mismatch of the thermal expansion coefficient between the material (8 Â 10 À6 K À1 ) and glass substrate (4.6 Â 10 À6 K À1 ). 41 The texture coefficient gives the quantitative information about the preferential crystallite orientation. The texture coefficient along (001) and (002) planes were calculated and plotted in Fig.…”