Which electrolyte is used in Nicad batteries?

Nickel-Cadmium (NiCd) batteries primarily use an alkaline electrolyte, which is typically a solution of either potassium hydroxide (commonly referred to as caustic potash) or sodium hydroxide. The caustic potash solution serves as the electrolyte that facilitates the movement of ions between the electrodes during the discharge and charging cycles of the battery.

Using caustic potash as the electrolyte is essential because it allows for efficient chemical reactions to occur within the battery, enabling it to store and release energy effectively. The alkaline environment helps prevent issues such as sulfation that can occur in other types of batteries and contributes to the longevity and performance of the NiCd battery.

In contrast, the other options do not serve as electrolytes in NiCd batteries. Sodium hydroxide is another alkaline solution that could be used, but it is not categorized under caustic potash specifically. Potassium nitrate is not typically used in battery applications, as it does not provide the same electrochemical properties needed for efficient energy storage and transfer. Lead acetate is associated more with lead-acid batteries and is not compatible with NiCd technology.