This behavior, characterized by peak shifting and separation, is typical of a quasi-reversible process, similar to lithium-ion intercalation in lithium-ion materials . By plotting the logarithm of the peak current against the logarithm of the scan rate (see Figure ), additional insight into the reaction type can be gained. With a slope of approximately 0.5, the plot suggests that the reaction is diffusion-controlled and follows the Randles-Sevcik equation , where the current is proportional to the square root of the scan rate.