Alkaline earth gel electrolyte supercapacitor

The supercapacitor of claim 9, wherein the at least one molybdenum doped carbon material is molybdenum doped graphene;

• the graphene of the at least one molybdenum doped carbon graphene has a sheet structure;
• molybdenum is on a surface of sheets of the sheet structure;
• and
• the at least one molybdenum doped graphene comprises 70-80 wt % C, 15-20 wt % O, 4-8 wt % H, and 3-10 wt % Mo, based on the total weight of the C, O, H, and Mo.

The supercapacitor of claim 9, wherein the at least one molybdenum doped carbon material is molybdenum doped CNTs;

• the molybdenum doped CNTs have a diameter of 10-100 nm;
• molybdenum is on walls of the CNTs;
• and
• the molybdenum doped CNTs comprise 60-70 wt % C, 20-25 wt % 0, 4-8 wt % H, and 10-20 wt % Mo, based on the total weight of the C, O, H, and Mo.

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.