It is also possible to use the current in mA instead of the current density normalized by the sensor electroactive area. If you are testing a series of sensors, and ensuring that the electroactive areas are identical (which is not very easy) you can use the current in mA on the Y axis, without problems, but you must justify this in the text.

Kiran Donthula you can use only the current intensity (mA) for the voltammogram, but it depends on the purpose of your experiment. Current intensity eliminates the dependence on electrode area, so you can compare electrodes with different areas. For example, if you perform experiments where the electrode area is constant, you can use only the current intensity.

Better to use Current Density for normalization and comparison

By expressing the current as a density, the effect of the electrode surface area on the measured current is eliminated. This allows for direct comparison of the electrochemical behavior of different electrodes, regardless of their size or surface area. Also, by using current density as the Y-axis, the results of cyclic voltammetry can be compared across different experiments, instruments, and laboratories. This is because the current density is a more consistent and reproducible measurement than the absolute current in milliamps (mA), which can vary depending on the experimental conditions.