Fig. 2
From: Characteristic fast H− ion conduction in oxygen-substituted lanthanum hydride
Alternating current impedance spectra and direct current polarization data. a, b Complex impedance plots of sample with x = 0.24 at T = 212 °C and T = 342 °C. The corresponding equivalent circuits used for the simulation are shown in the insets. Cgeo, R, CPE, and L are parasitic capacitance, resistance, constant phase element, and inductance, respectively. Open black circles show the result for Cu. c Current as a function of time upon application of 0.1 V constant voltage at x = 0.25 and T = 342 °C
