Modified carbon nanotubes and methods of forming carbon nanotubes

Patent metadata

Field	Value
Publication number	US-10059848-B2
Application number	US-201615162557-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	Mar 9, 2006
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

In this invention, processes which can be used to achieve stable doped carbon nanotubes are disclosed. Preferred CNT structures and morphologies for achieving maximum doping effects are also described. Dopant formulations and methods for achieving doping of a broad distribution of tube types are also described.

First claim

We claim:

1. A solid carbon nanotube (CNT) composition, comprising:
carbon nanotubes,
at least 0.5 wt % S and at least 0.5 wt % Cl,
and exhibiting a tangential mode (TM) position with a peak maximum between 1593 to 1605 cm −1 in the Raman spectrum.

2. The CNT composition of claim 1 , further exhibiting a substantially bleached v s 1 →c s 1 in the optical absorbance spectrum.

3. The CNT composition of claim 1 having a bulk conductivity greater than 300 S/cm.

4. The CNT composition of claim 1 having a bulk conductivity in the range 300 S/cm to 50,000 S/cm.

5. The CNT composition of claim 1 having a bulk conductivity in the range of 300 to 10,000 S/cm.

6. The CNT composition of claim 1 exhibiting a tangential mode position with a peak maximum between 1595 to 1600 cm −1 in the Raman spectrum.

7. The CNT composition of claim 1 wherein the composition is a network film.

8. The CNT composition of claim 1 having a volume fraction of CNTs greater than 0.40.

9. The CNT composition of claim 1 having a film thickness greater than 20 nm.

10. The CNT composition of claim 7 having a film thickness less than 500 nm.

11. The CNT composition of claim 1 comprising a mixture of single and multiwalled CNTs.

12. The CNT composition of claim 1 comprising at least 10 mass % bundles.

13. The CNT composition of claim 1 having G/D greater than 8.

14. The CNT composition of claim 1 having G/D in the range of 8 to 40.

15. The CNT composition of claim 1 having G/D in the range of 14 to 18.

16. The CNT composition of claim 1 wherein the carbon nanotubes consist essentially of DWNT and/or MWNT.

17. The CNT composition of claim 1 wherein the carbon nanotubes consist essentially of SWNT.

18. The CNT composition of claim 1 comprising at least 10 mass % belts.

Assignees

• Battelle Memorial Institute

Inventors

• Heintz Amy M
• Risser Steven
• Elhard Joel D
• Moore Bryon P
• Liu Tao
• Vijayendran Bhima R

Classifications

• C09D7/61

  inorganic · CPC title

• C03C17/007

  containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase · CPC title

• Y10T428/30

  Self-sustaining carbon mass or layer with impregnant or other layer · CPC title

• C03C17/42

  at least one coating of an organic material and at least one non-metal coating · CPC title

• C01B32/168 Primary

  After-treatment · CPC title