To correlate the peaks in the negative-going scan with those in the positive-going scan for both types (batches 3 and 4 in Figure ), we recorded a series of CVs in a set of window opening experiments, where the UPL was fixed at 1.7 V and the LPL was decreased from 0.0 V (grey) to -0.5 V (blue), -1.0 V (red), and -1.5 V (black), as illustrated in Figure . The first potential cycle between 0.0 V and 1.7 V is denoted as initial CV. For each potential win- dow, two consecutive CVs were recorded, of which only the first is shown. The second potential cycles in comparison to the first for each potential window are shown in Figure . In addition, after decreasing the LPL and recording two potential cycles, the LPL was again set to 0.0 V (the potential window of the initial CV), recording a minimum of two potential cycles until the deviations from the initial CV become insignificant. The corresponding CVs in the potential window of the initial CV are shown in Figure . Since the initial CVs look almost identical after each experimental step, we infer that the initial interface structure can be restored after the excursion to lower poten-tial limits. However, in some cases several potential cycles are needed to restore the initial behaviour, indicating that this process is determined by kinetics and/or diffusion which occurs in the double-layer region between the electrode and the electrolyte.