US 12,142,425 B2
Supercapacitor with gel electrolyte for electrochemical double-layer energy storage
Ayhan Bozkurt, Dammam (SA); Emre Cevik, Dammam (SA); and Seyda Tugba Gunday Anil, Dammam (SA)
Assigned to Imam Abdulrahman Bin Faisal University, Dammam (SA)
Filed by Imam Abdulrahman Bin Faisal University, Dammam (SA)
Filed on Mar. 31, 2022, as Appl. No. 17/709,713.
Prior Publication US 2023/0317379 A1, Oct. 5, 2023
Int. Cl. H01G 11/24 (2013.01); H01G 11/32 (2013.01); H01G 11/48 (2013.01); H01G 11/56 (2013.01)
CPC H01G 11/24 (2013.01) [H01G 11/32 (2013.01); H01G 11/48 (2013.01); H01G 11/56 (2013.01)] 20 Claims
 
1. A 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 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 supercapacitor.