Alkaline earth gel electrolyte supercapacitor

A gel electrode supercapacitor, comprising:

• two nanocomposite electrodes, and
• a gel electrolyte comprising an alkaline earth salt selected from the group consisting of barium hydroxide, calcium hydroxide and magnesium chloride, and propylene glycol;
• wherein each nanocomposite electrode comprises:
• a substrate;
• polyvinylidene fluoride as a binding compound;
• at least one conductive additive;
• and
• at least one molybdenum doped carbon material selected from the group consisting of molybdenum doped graphene and molybdenum doped carbon nanotubes (CNTs);
• wherein a mixture of 5-10 wt % of the polyvinylidene fluoride, 65-92 wt % of the at least one conductive additive, and 3-25 wt % of the at least one molybdenum doped carbon material based on the total weight of the at least one binding compound, the at least one conductive additive, and the at least one molybdenum doped carbon material, at least partially coats a surface of the substrate;
• wherein the nanocomposite electrodes face one another, wherein the substrate of each nanocomposite electrode is at least partially coated with the mixture on an inside facing surface and the outer surfaces of each of the nanocomposite electrodes are not coated with the mixture;
• and
• wherein the inside facing surfaces are separated by the gel electrolyte.