A typical symmetrical supercapacitor having carbon-based electrodes (activated carbon) in an aqueous electrolyte is shown here. Answer the following questions. 1. How does an electric double layer in a supercapacitor ensure higher capacitance than an electrostatic capacitor? 2. If activated carbon is coated with a thin layer of RuO2, will there be any effect on the performance of this supercapacitor? Why? 3. Potential has a significant role in increasing the energy density of the device (E= 1/2 CV2). How can working potential of this capacitor be increased? List any two approaches.

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