Flexible energy storage device with carbon electrodes

Patent metadata

Field	Value
Publication number	US-2025391615-A1
Application number	US-202519305942-A
Country	US
Kind code	A1
Filing date	Aug 21, 2025
Priority date	Sep 9, 2022
Publication date	Dec 25, 2025
Grant date	—

Abstract

A flexible energy storage device with a redox-active biopolymer organogel electrolyte is provided. The flexible energy storage device can include a pair of electrodes separated by the redox-active biopolymer organogel electrolyte. The redox-active biopolymer organogel electrolyte can include a biopolymer organogel, redox-active molybdenum-containing ions, and a secondary ionic substance. The flexible energy storage device may retain greater than 75% of an unbent specific capacitance when bent at an angle of 10° to 170°.

First claim

1 . A flexible energy storage device, comprising:
a pair of electrodes separated by a redox-active biopolymer organogel electrolyte, wherein each electrode of the pair of electrodes comprises a metal support coated with a film comprising activated carbon, conductive carbon, and a binder, wherein the redox-active biopolymer organogel electrolyte comprises:
a biopolymer organogel comprising a biopolymer gelator and a gel solvent;
redox-active molybdenum-containing ions; and
a secondary ionic substance which is at least one selected from the group consisting of a lithium salt and a sodium salt,
wherein the flexible energy storage device retains greater than 75% of an unbent energy storage capacity when bent at an angle of 10 to 170°,
wherein the biopolymer gelator is agarose,
wherein the biopolymer gelator is present in the biopolymer organogel in an amount of 7.5 to 40 wt. %, based on a total weight of biopolymer organogel,
wherein the gel solvent is glycerol,
wherein the redox-active molybdenum-containing ions are molybdate anions,
wherein the redox-active molybdenum-containing ions are present in an amount of 0.1 to 15.0 wt. %, based on a total weight of the redox-active biopolymer organogel electrolyte, and
wherein the secondary ionic substance is present in an amount of 1.0 to 20.0 wt. %, based on a total weight of redox-active biopolymer organogel electrolyte.

2 - 5 . (canceled)

6 . The flexible energy storage device of claim 1 , wherein the glycerol is present in an amount of 50 to 97.5 wt %, based on a total weight of biopolymer organogel.

7 - 9 . (canceled)

10 . The flexible energy storage device of claim 1 , wherein the redox-active biopolymer organogel electrolyte has a DC conductivity (CDC) of 5.00×10 −5 to 1.00×10 −3 Scm −1 at a temperature of 10 to 30° C.

11 . The flexible energy storage device of claim 1 , wherein the redox-active biopolymer organogel electrolyte has an AC conductivity of 2.00×10 −5 to 6.50×10 4 Scm −1 at a frequency of 10 3 to 10 6 Hz and a temperature of 10 to 30° C.

12 . The flexible energy storage device of claim 1 , wherein the redox-active biopolymer organogel electrolyte has a maximum dielectric loss at a frequency of 5.00×10 4 to 5.00×10 4 Hz at a temperature of 10 to 30° C.

13 . (canceled)

14 . The flexible energy storage device of claim 1 , which is capable of being twisted and/or bent to an angle of 0 to 180° without breaking, tearing, or ripping at a temperature of −40 to 120° C.

15 . A method of forming the flexible energy storage device of claim 1 , the method comprising:
mixing the biopolymer gelator, gel solvent, redox-active molybdenum-containing ions, and secondary ionic substance to form the redox-active biopolymer organogel electrolyte; disposing the redox-active biopolymer organogel electrolyte on a first electrode such that the redox-active biopolymer organogel electrolyte forms a uniform film covering an entirety of a top surface of the first electrode; and placing onto the redox-active biopolymer organogel electrolyte a second electrode such that the second electrode is separated from the first electrode by the redox-active biopolymer organogel electrolyte to form the flexible energy storage device.

16 . The method of claim 15 , wherein the first electrode, the second electrode, or both, are prepared by uniformly depositing the film comprising activated carbon, conductive carbon, and the binder such that an entirety of a top surface of the metal support is individually covered by the film.

17 - 20 . (canceled)

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Cevik Emre
• Asiri Sarah Mousa Maadi
• Bozkurt Ayhan

Classifications

• H01G11/56

  Solid electrolytes, e.g. gels; Additives therein · CPC title

• H01G11/34

  characterised by carbonisation or activation of carbon · CPC title

• H01G11/04

  Hybrid capacitors · CPC title

• H01G11/84

  Processes for the manufacture of hybrid or EDL capacitors, or components thereof · CPC title

• H01G11/02 Primary

  using combined reduction-oxidation reactions, e.g. redox arrangement or solion · CPC title