Fig shows the room temperature XRD pattern

The intercepts with axes at high frequencies and low frequencies represent the ohmic resistance (Ro) and the total resistance (Rt) of the cell, respectively. The interfacial polarization resistance (Rp) of the cell can be calculated as the difference between Rt and Ro. The total cell resistance (Rt), ohmic resistance (Ro), as well as interfacial polarization resistance (Rp) are then determined from the impedance spectra in Fig. 5(a), the results are shown in Fig.