Electrochemical Characterization of Nanoporous Nickel Oxide Thin Films Spray-Deposited onto Indium-Doped Tin Oxide for Solar Conversion Scopes
(a) High- and (b) low-frequency electrochemical impedance spectra of RDS NiOx ( μm) spray-deposited onto ITO. Impedance spectra were recorded at different applied potentials (). The selected values of are related to the nature of the NiOx layer, in the pristine uncharged state ( V versus Li+/Li), in the partially oxidized state ( = 2.8 V versus Li+/Li), and in the fully oxidized state ( = 3.5 V versus Li+/Li). For electrolyte and cell configuration used, see Figure 1. In the upper plot the arrows indicate the direction of increase for the frequency of polarization.