Carbon nanotube array bonding

Patent metadata

Field	Value
Publication number	US-11075383-B2
Application number	US-201715858566-A
Country	US
Kind code	B2
Filing date	Dec 29, 2017
Priority date	Jun 15, 2011
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

Material compositions are provided that may comprise, for example, a vertically aligned carbon nanotube (VACNT) array, a conductive layer, and a carbon interlayer coupling the VACNT array to the conductive layer. Methods of manufacturing are provided. Such methods may comprise, for example, providing a VACNT array, providing a conductive layer, and bonding the VACNT array to the conductive layer via a carbon interlayer.

First claim

The invention claimed is:

1. A battery electrode composition, comprising:
an active material coating including an active material, the active material comprising one or more of silicon, tin, germanium, phosphorous, sulfur, a sulfide, a fluoride, a silicate, or any combination thereof;
a metal-comprising, electrically conductive current collector; and
an electrically conductive, carbon-comprising or polymer-comprising interlayer separate from the active material coating and coupling the active material coating to the electrically conductive current collector.

2. The battery electrode composition of claim 1 , wherein the active material coating exhibits a specific capacity greater than about 3000 mAh/g.

3. The battery electrode composition of claim 1 , wherein the active material coating comprises a battery electrode active material functional layer.

4. The battery electrode composition of claim 3 , wherein the battery electrode active material functional layer comprises a silicon-based active material, and wherein the battery electrode composition is operable in a Li-ion battery.

5. The battery electrode composition of claim 3 , wherein the battery electrode active material functional layer comprises active material particles that comprise the one or more of silicon, tin, germanium, phosphorous, sulfur, a sulfide, a fluoride, a silicate, or any combination thereof.

6. The battery electrode composition of claim 1 , wherein the active material coating comprises a thermally conductive material.

7. The battery electrode composition of claim 1 , wherein the active material coating comprises carbon nanotubes.

8. The battery electrode composition of claim 7 , wherein the carbon nanotubes are arranged as a vertically aligned carbon nanotube (VACNT) array.

9. The battery electrode composition of claim 1 , wherein the active material coating comprises carbon nanotubes and a battery electrode active material functional layer.

10. The battery electrode composition of claim 1 , wherein the electrically conductive current collector comprises copper.

11. The battery electrode composition of claim 1 , wherein the electrically conductive current collector comprises nickel.

12. The battery electrode composition of claim 1 , wherein the electrically conductive, carbon-comprising or polymer-comprising interlayer comprises carbon.

13. The battery electrode composition of claim 1 , wherein the electrically conductive, carbon-comprising or polymer-comprising interlayer comprises one or more polymers.

14. The battery electrode composition of claim 13 , wherein the one or more polymers comprise polyvinylidene difluoride (PVDF).

15. The battery electrode composition of claim 1 , wherein the electrically conductive, carbon-comprising or polymer-comprising interlayer comprises carbon and one or more polymers.

16. The battery electrode composition of claim 1 , wherein the electrically conductive, carbon-comprising or polymer-comprising interlayer does not comprise the active material.

17. The battery electrode composition of claim 1 , wherein the electrically conductive, carbon-comprising or polymer-comprising interlayer is interspersed with the active material coating.

18. The battery electrode composition of claim 16 , wherein the electrically conductive, carbon-comprising or polymer-comprising interlayer comprises electrically conductive fibrous material interspersed with the active material coating.

Assignees

• Georgia Tech Res Inst

Inventors

• Yushin Gleb Nikolayevich
• Evanoff Kara Linn

Classifications

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C01B32/168

  After-treatment · CPC title

• H01M4/625 Primary

  Carbon or graphite · CPC title

• Y10S977/842

  for carbon nanotubes or fullerenes · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title