Separators for three-dimensional batteries

Patent metadata

Field	Value
Publication number	US-2025226532-A1
Application number	US-202519008476-A
Country	US
Kind code	A1
Filing date	Jan 2, 2025
Priority date	Mar 15, 2013
Publication date	Jul 10, 2025
Grant date	—

Abstract

An electrode structure for use in an energy storage device, the electrode structure comprising a population of electrodes, a population of counter-electrodes, and an electrically insulating material.

First claim

1 . A device for electrical current conductance, the device comprising: electrodes and counter-electrodes stacked along an axis to form a stack, the electrodes being arranged in alternating sequence with the counter-electrodes, each of the electrodes being separated from each of the counter-electrode by a first separator stacked along the axis, the stack contacting a second separator contacting the stack at opposing sides of the stack, the first separator and the second separator being electrically insulating.

2 . The electrode structure of claim 1 , wherein the microporous separator material includes a mesoporous material and/or a microporous material.

3 . The electrode structure of claim 1 , wherein: (i) a length of each of the electrodes and of each of the counter-electrodes is from 5 mm to 500 mm, a width of each of the electrodes and each of the counter-electrodes, is from 0.01 mm to 2.5 mm, and a height of each of the electrodes and of each of the counter-electrodes, is of from 0.05 mm to 10 mm, (ii) the separator being a layer having a thickness of from about 5 to about 50 micrometers and/or (iii) each of the population of electrodes and the population of counter-electrodes, comprise at least 10 members.

4 . The electrode structure of claim 3 , wherein each of the population of electrodes and of the population of counter-electrodes, comprises at least 50 members, or at least 100 members.

5 . The electrode structure of claim 1 , wherein a cross-section of each of the electrodes and of each of the counter-electrodes has a length to a perimeter ratio of at least 1.25:1 or a higher length to a perimeter ratio.

6 . The electrode structure of claim 1 , wherein each member of the population of electrodes and of the population of counter-electrodes, has (a) a length to a width of at least 5:1 or higher, (b) a length to a height of at least 5:1 or higher, and/or (c) the height to the width between 0.4:1 and 1000:1.

7 . The electrode structure of claim 1 , wherein each of the electrodes comprises an electrode current collector layer coupled with electrode active material, the electrode current collector layer and the electrode active material having an electrical conductance, a ratio of the electrical conductance of the electrode current collector layer to the electrical conductance of the electrode active material being at least 100:1.

8 . The electrode structure of claim 1 , wherein each of the electrodes comprises electrode active material comprising carbon, silicon, or a composite thereof.

9 . The electrode structure of claim 8 , wherein each of the electrodes comprises electrode active material comprising nanowires, or porous silicon, the electrodes being anodes.

10 . The electrode structure of claim 1 , wherein each of the electrodes comprises electrode active material comprising soft carbon, hard carbon, silicon, an alloy of silicon, or a composite material, the electrodes being anodes.

11 . The electrode structure of claim 10 , wherein (I) the composite material comprises a carbon composite, (II) the electrode active material comprises soft carbon, hard carbon, and silicon, and/or (III) the electrode active material comprises a physically porous material.

12 . The electrode structure of claim 1 , wherein each of the electrodes comprises electrode active material configured for growth of a solid electrolyte interface (SEI) thereon.

13 . A method for fabricating the electrode structure of claim 1 , the method comprising performing operations to fabricate the electrode structure.

14 . A battery comprising a battery enclosure, an electrolyte, and the electrode structure of claim 1 , the electrolyte being non-aqueous.

15 . The battery of claim 14 , wherein the battery is a secondary battery.

16 . The battery of claim 14 , wherein the electrolyte comprises alkyl acetates or cyclic esters.

17 . The battery of claim 16 , wherein the cyclic esters comprise carbonate esters.

18 . The battery of claim 17 , wherein the carbonate esters comprise propylene carbonate or method ethyl carbonate.

19 . A method for fabricating the battery of claim 14 , the method comprising performing operations to fabricate the battery.

20 . The method of claim 19 , wherein the operations comprise machining, ablation, slurry-casing, mask deposition, patterning, densification, or any combination thereof.

Assignees

• Enovix Corp

Inventors

• Ramasubramanian Murali
• Armstrong Michael
• Brusca Brian E
• Dioumaev Vladimir
• Koblmiller Gunther A
• Lahiri Ashok
• Lauchlan Laurie J
• Rust Iii Harrold J
• Shah Nirav S
• Spotnitz Robert M
• Wilcox James D

Classifications

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title