Figure 6: Electrochemical impedance spectroscopy at (a) -10, (b)
0, (c) 25 and (d) 40 ℃.
According to the standard equivalent circuit model, the measured
impedance data were analyzed by using a complex non-linear least squares
(CNLS) fitting method (Figure 7). EIS studies the system response to the
application of a periodic small amplitude AC
signal.5,10 Analysis of the system response contains
information about the interface, its structure and reactions taking
place at the interfaces e.g.,
electrolyte-electrodes.20