Comparing both types, it is apparent that the processes of peaks C1 and C2 occur at similar potentials. Since the peaks are only separated by ca. 0.1 V, it is hard to differentiate if the increase in current density is related to an increase of one of the peaks, or both of them. We assume that peak C2 in batch 4 (Figure ) is indeed a combination of the processes connected to peaks C1 and C2. First, we have shown above, that peak C2 is related to peak A2 in the positive-going scan, and thus peak A2 will possibly only increase when peak C2 increases. Second, a similar experiment performed with batch 2 (see Figure in the SI) also shows a peak pair C2/A2 in the CV without additional water. Upon addition of water the current density of both peaks C1 and C2 increases in this case, where peak C2 is clearly separated from peak C1. Based on these results we are confident that the intensity of both peaks C1 and C2 increases with the addition of water to the IL.