IP Library Granted Patent US 12,444,755
Granted Patent B2
US 12,444,755 · App. 18/436,647 · Granted Oct 14, 2025

Corrugated fuel electrode

Inventors: Joel Ryan Hayes (Chandler, AZ); Ramkumar Krishnan (Scottsdale, AZ); Todd Trimble (Phoenix, AZ); Clifford Anderson (Tempe, AZ)
Assignee: FORM ENERGY, INC.
H01M8/0254H01M4/661H01M4/742H01M4/747H01M4/78H01M8/0232H01M8/0245H01M8/184H01M12/08
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Quick Facts
Patent No.
US 12,444,755
App. No.
18/436,647
Granted
Oct 14, 2025
Kind
B2
Abstract

A fuel electrode incorporates a first and second corrugated portion that are attached to each other at offset angles respect to their corrugation axis and therefore reinforce each other. A first corrugated portion may extend orthogonally with respect to a second corrugated portion. The first and second corrugated portions may be formed from metal wire and may therefore have a very high volumetric void fraction and a high surface area to volume ratio (sa/vol). In addition, the strands of the wire may be selected to enable high conductivity to the current collectors while maximizing the sa/vol. In addition, the shape of the corrugation, including the period distance, amplitude and geometry may be selected with respect to the stiffness requirements and electrochemical cell application factors. The first and second corrugated portions may be calendared or crushed to reduce thickness of the fuel electrode.

Claims (11)

1. A method of operating an electrochemical cell, the method comprising:

electrodepositing a metal fuel, via an ionically conductive medium in ionic communication between a fuel electrode and a cathode, on a first corrugated portion and a second corrugated portion of the fuel electrode, the first corrugated portion and the second corrugated portion each including electrically conductive material, the first corrugated portion and the second corrugated portion each defining respective apertures therethrough, the first corrugated portion having a first corrugation axis, and the second corrugated portion having a second corrugation axis offset from the first corrugation axis; and

via the ionically conductive medium, oxidizing the metal fuel at the first corrugated portion and the second corrugated portion of fuel electrode.

2. The method of claim 1 , wherein the first corrugated portion and the second corrugated portion are attached to one another.

3. The method of claim 1 , wherein oxidizing the metal fuel at the first corrugated portion and the second corrugated portion of the fuel electrode includes reducing oxygen at an air cathode of the electrochemical cell.

4. The method of claim 1 , further comprising creating a convective flow of the ionically conductive medium in ionic communication between the fuel electrode and the cathode.

5. The method of claim 4 , wherein creating the convective flow of the ionically conductive medium comprises flowing the ionically conductive medium in a direction away from the cathode and across a top of the fuel electrode.

6. The method of claim 4 , wherein creating the convective flow includes flowing the ionically conductive medium to pass through apertures defined by the first corrugated portion and the second corrugated portion.

7. The method of claim 1 , wherein the first corrugated portion has a first corrugation ratio and the second corrugated portion has a second corrugation ratio, and the first corrugation ratio and the second corrugation ratio are each greater than 0.75 and less than about 5.0.

8. The method of claim 1 , wherein the first corrugated portion and the second corrugated portion each have a smooth continuous outer surface, and the metal fuel is electrodeposited on the smooth continuous outer surface.

9. The method of claim 1 , wherein the first corrugated portion and the second corrugated portion are calendared or crushed together.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 29, 2025
From: HAYES, JOEL RYAN; KRISHNAN, RAMKUMAR; TRIMBLE, TODD; ANDERSON, CLIFFORD
To: FLUIDIC INC.
Reel/Frame 071867/0836 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 29, 2025
From: NANTENERGY, INC.; NANTENEGY, LLC; FLUIDIC, INC.; NANT HOLDINGS IP, LLC
To: FORM ENERGY, INC.
Reel/Frame 072262/0196 →
Continuity (4)
Continuation 17663318 · May 13, 2022
Continuation 16343158
Provisional Application 62410852 · Oct 21, 2016
Related Publication 20240387837A1 · Nov 21, 2024
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