Supercapacitor battery with polyacrylic acid hydrogel electrolyte
AssigneeImam Abdulrahman Bin Faisal University
InventorsAyhan Bozkurt, Emre Cevik
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Abstract
A flexible energy storage device with a redox-active polymer hydrogel electrolyte is provided. The flexible energy storage device can include a pair of electrodes separated by the redox-active polymer hydrogel electrolyte. The redox-active polymer hydrogel electrolyte can include a polymer hydrogel, charge balancing anions and redox-active transition metal cations at least one selected from the group consisting of vanadium, chromium, manganese, cobalt, and copper. The flexible energy storage device may retain greater than 75% of an unbent specific capacitance when bent at an angle of 10° to 170°.
Claims8
A cyclically chargeable flexible supercapacitor battery, comprising:
- a flexible electrode cell assembly comprising:
- a pair of electrodes, including a metal foil current collector and a carbon composite electrode, separated by a redox-active polyacrylic acid hydrogel electrolyte, the redox-active polyacrylic acid hydrogel electrolyte comprising:
- a polyacrylic acid hydrogel, wherein polyacrylic acid is present in the polyacrylic acid hydrogel in an amount of 10 to 50 wt. %, based on a total weight of polyacrylic acid hydrogel,
- redox-active transition metal cations which are at least one selected from the group consisting of vanadium, chromium, manganese, cobalt, and copper, and
- charge balancing anions;
- wherein the flexible electrode cell assembly retains greater than 75% of an unbent energy storage capacity when bent at an angle of 10 to 170°,
- wherein the flexible electrode cell assembly has a specific capacitance of 300 to 380 F/g.
Dependencies are inferred from the claim text.