Gel electrolyte supercapacitor

A gel electrolyte supercapacitor, comprising:

• two electrodes;
• and
• a gel electrolyte;
• wherein the gel electrolyte comprises:
• a polyol compound that is selected from the group consisting of glycerol and ethylene glycol;
• a base with a molarity (M) of 1-5 in the polyol compound;
• and
• 1-10 wt % of boric acid relative to the weight of the polyol compound;
• wherein the boric acid intercalates with a first mixture of the polyol compound and the base, creating a gel;
• wherein
• the base is selected from a group consisting of lithium hydroxide, sodium hydroxide, and potassium hydroxide;
• wherein the two electrodes each comprise:
• a second mixture comprising 5-10 wt % of a conductive additive, 5-10 wt % of a binding compound, and 80-90 wt % of an activated carbon, based on the total weight of the conductive additive, the binding compound, and the activated carbon;
• and
• wherein the second mixture is at least partially coated on an inner surface of a substrate, wherein the substrate is formed from at least one material selected from the group consisting of copper, aluminum and nickel;
• wherein an outer surface of the substrate is not coated with the second mixture;
• and
• wherein the inner surfaces of the two electrode substrates are separated by and in physical contact with the gel electrolyte to form the gel electrolyte supercapacitor.