Electrical power storage devices

Patent metadata

Field	Value
Publication number	US-12062794-B2
Application number	US-202318341673-A
Country	US
Kind code	B2
Filing date	Jun 26, 2023
Priority date	Nov 18, 2008
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

An electrical storage device includes high surface area fibers (e.g., shaped fibers and/or microfibers) coated with carbon (graphite, expanded graphite, activated carbon, carbon black, carbon nanofibers, CNT, or graphite coated CNT), electrolyte, and/or electrode active material (e.g., lead oxide) in electrodes. The electrodes are used to form electrical storage devices such as electrochemical batteries, electrochemical double layer capacitors, and asymmetrical capacitors.

First claim

What is claimed is:

1. An electrode comprising:
a charge collector comprising a mat of fibers;
wherein the charge collector is loaded with electrode active material; and
wherein the fibers comprise a carbon selected from a group consisting of graphite, expanded graphite, activated carbon, carbon black, carbon nanofibers, and carbon nanotubes, and further wherein at least a portion of said fibers are selected from a group consisting of trilobal cross-sectional fibers, and quadrilobal cross-sectional fibers, with each lobe of the respective cross-sectional fibers having a radial section and an end section with the end section extending from and at least substantially orthogonal to the radial section.

2. The electrode of claim 1 , where the fibers have a cross sectional diameter ranging from about 1 micron to about 100 microns.

3. The electrode of claim 1 , wherein the fibers are shaped fibers.

4. The electrode of claim 1 , wherein the fibers are microfibers.

5. The electrode of claim 1 , wherein the mat is formed of a woven or non-woven mesh in a pattern to at least one of adhere and support the electrode active material.

6. A lead-acid battery comprising:
a positive electrode and a negative electrode contained within a housing having electrolyte; and
the negative electrode comprising a mat of fibers comprising a carbon selected from a group consisting of graphite, expanded graphite, activated carbon, carbon black, carbon nanofibers, and carbon nanotubes, wherein the fibers are loaded with electrode active material, and further wherein at least a portion of said fibers are selected from a group consisting of trilobal cross-sectional fibers, and quadrilobal cross-sectional fibers, with each lobe of the respective cross-sectional fibers having a radial section and an end section with the end section extending from and at least substantially orthogonal to the radial section.

7. The battery of claim 6 , further comprising a separator between the positive electrode and the negative electrode.

8. The battery of claim 6 , wherein the fibers have a cross sectional diameter ranging from about 1 micron to about 100 microns.

9. The battery of claim 6 , wherein the fibers are shaped fibers.

10. The battery of claim 6 , wherein the fibers are microfibers.

11. The battery of claim 6 , wherein the mat is formed of a woven or non-woven mesh in a pattern to at least one of adhere and support the electrode active material.

12. The battery of claim 6 , wherein the fibers are obtained from a group consisting of polyester, polypropylene, polyethylene, and polyethylene terephthalate.

13. The battery of claim 6 , wherein the fibers are configured to help optimize charge acceptance.

Assignees

• Cps Tech Holdings Llc
• Clarios Germany Gmbh & Co Kg

Inventors

• Sturgeon Richard M
• Wetzel Dennis A
• Gruenstern Robert G
• Wruck William J
• Subbaraman Ramachadran
• Symanski James
• Meissner Eberhard

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/668

  Composites of electroconductive material and synthetic resins · CPC title

• H01G11/40

  Fibres · CPC title

• H01G11/36

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• H01G11/34

  characterised by carbonisation or activation of carbon · CPC title