Fig. 5.

Example electrochemical area measurements for a NiCo thin film. The sample had a deposited charge of 1000 mC. The inset shows CV measurements in 5 mM Ru(NH${}_3$)${}_6$Cl${}_3$ and 1 M KCl at 200, 400, and 800 mV/s. The magnitude of the peak cathodic current, $I_{\mathrm{p}}$, is fit to a square root function vs. scan rate, v, to determine the area, $A_{\mathrm{ec}}$, of the sample using the Randles–Sevcik equation