When to use aqueous electrolyte and when to employ an acidic electrolyte for supercapacitor?
Selection of electrolyte depends on your active material. In this regard literature survey helps you. You have to check compatibility and stability of the electrolyte with your electrode materials.
When selecting an electrolyte for a supercapacitor, there are several factors to consider. Conductivity: To enable effective charge transfer between the electrodes and the electrolyte, the electrolyte must possess a high conductivity. The electrolyte's ionic or electronic conductivity is commonly used to measure conductivity. The electrolyte shouldn't break down or deteriorate over time; it needs to be stable over the supercapacitor's potential range. For the supercapacitor's long-term stability, this is particularly crucial. The supercapacitor's electrodes, other parts, and electrolyte must all get along. Compatibility with other parts, such as the separator, as well as the electrodes' materials is a part of this. The electrolyte shouldn't be hazardous, flammable, or difficult to handle in any other way. High specific capacitance and good rate capability are required of the electrolyte. As the operating temperature of supercapacitors might vary, the electrolyte needs to be stable and have good conductivity over a broad temperature range.
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