Energy storage device for galvanostatic charge-discharge

Patent metadata

Field	Value
Publication number	US-2025022667-A1
Application number	US-202418898015-A
Country	US
Kind code	A1
Filing date	Sep 26, 2024
Priority date	Apr 9, 2021
Publication date	Jan 16, 2025
Grant date	—

Abstract

A flexible energy storage device with a glycerol-based gel electrolyte is provided. The flexible energy storage device can include a pair of electrodes separated by the gel electrolyte. The electrolytes can be in gel form, bendable and stretchable in a device. The gel electrolyte can include glycerol, redox-active molybdenum-containing ions, and a secondary ionic substance. The secondary ionic substance can include a salt. The gel electrolyte can have a density of 1.4 to 1.9 g/cm 3 and an ionic conductivity of 2.3×10 −4 to 3.2×10 −4 Scm −1 . The flexible energy storage device may retain greater than 95% of an unbent energy storage capacity when bent at an angle of 10 to 170°.

First claim

1 . An energy storage device for galvanostatic charge-discharge, comprising:
a pair of electrodes separated by a gel electrolyte, the gel electrolyte comprising glycerol, redox-active molybdenum-containing ions, and a secondary ionic substance, wherein the glycerol is present in an amount of 40 to 98 wt %, based on a total weight of the gel electrolyte, and the redox-active molybdenum-containing ions are molybdate anions present in an amount of 1 to 25 wt %, based on a total weight of the gel electrolyte, and a gel electrolyte support disposed between the electrodes, wherein the gel electrolyte is embedded in and penetrates the gel electrolyte support and the gel electrolyte support is in the form of a film, 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°.

2 - 4 . (canceled)

5 . The flexible energy storage device of claim 1 , wherein the secondary ionic substance is present in an amount of 1 to 35 wt %, based on a total weight of gel electrolyte.

6 . The flexible energy storage device of claim 1 , wherein the secondary ionic substance is at least one selected from the group consisting of a hydroxide salt, a halide salt, a sulfate salt, a nitrate salt, a perchlorate salt, a tetrafluoroborate salt, a difluoro(oxalato)borate salt, a hexafluorophosphate salt, and a bis(trifluoromethanesulfonyl)imide salt.

7 . The flexible energy storage device of claim 1 , wherein the secondary ionic substance is an alkali metal hydroxide.

8 . The flexible energy storage device of claim 7 , wherein the alkali metal hydroxide is potassium hydroxide.

9 . The flexible energy storage device of claim 1 , wherein the gel electrolyte is substantially free of water.

10 . The flexible energy storage device of claim 1 , wherein the gel electrolyte is substantially free of polymer additives.

11 . The flexible energy storage device of claim 1 , wherein the gel electrolyte has a density of 1.4 to 1.9 g/cm 3 .

12 . The flexible energy storage device of claim 1 , wherein the gel electrolyte has an ionic conductivity of 2.3×10 −4 to 3.2×10 −4 Scm −1 .

13 . The flexible energy storage device of claim 1 , wherein one or both of the electrodes are carbon electrodes.

14 . The flexible energy storage device of claim 1 , wherein the energy storage device is a supercapacitor, a fuel cell, or a battery.

15 . The flexible energy storage device of claim 14 , wherein the flexible energy storage device is a supercapacitor having a specific capacitance of 275 to 350 F/g.

16 . The flexible energy storage device of claim 14 , wherein the flexible energy storage device is a supercapacitor having an energy density of 40 to 50 Wh/kg.

17 - 20 . (canceled)

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Bozkurt Ayhan
• Cevik Emre
• Anil Seyda Tugba Günday

Classifications

• H01G11/02 Primary

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

• H01M8/1016

  characterised by the electrolyte material (H01M8/12 takes precedence) · CPC title

• H01M8/188

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• H01M6/187

  Solid electrolyte characterised by the form · CPC title

• H01G11/38

  Carbon pastes or blends; Binders or additives therein · CPC title