Building Supercapacitors with Electrolytes and Carbon Electrodes

Supercapacitors (SCs), also known as "ultracapacitors", are used in applications requiring rapid energy storage or high-power delivery. Carbon-based materials for supercapacitors derived from affordable coal deposits or crop waste withappropriate characteristics in terms of specific surface area, electrical conductivity, and charge/discharge stability. Inaddition, the substitution of organic liquids electrolytes with less dangerous solutions, such as aqueous electrolytescontaining high concentrations of salt, is a valuable strategy for the design of green devices.