Electrolysis methods that utilize carbon dioxide and a non-iron additive for making desried nanocarbon allotropes

Patent metadata

Field	Value
Publication number	US-2025290209-A1
Application number	US-202519225700-A
Country	US
Kind code	A1
Filing date	Jun 2, 2025
Priority date	Nov 24, 2021
Publication date	Sep 18, 2025
Grant date	—

Abstract

A method for producing a CNM product includes: heating an electrolyte media to obtain a molten electrolyte media; positioning the molten electrolyte media between an anode and a cathode of an electrolytic cell; introducing a source of carbon into the electrolytic cell; introducing an iron-free, chromium-containing additive into the electrolyte media before the step of heating or introducing the iron-free additive into the molten electrolyte media, in which the iron-free, chromium-containing additive is added in an amount of between about 0.05 wt % to about 2 wt %, relative to the amount of the electrolyte media or the molten electrolyte media; applying an electrical current to the cathode and the anode in the electrolytic cell; and collecting the CNM product from the cathode.

First claim

1 .- 28 . (canceled)

29 . A method for producing a carbon nanomaterial (CNM) product, the method comprising steps of:
(a) heating an electrolyte media to obtain a molten electrolyte media; (b) positioning the molten electrolyte media between an anode and a cathode of an electrolytic cell; (c) introducing a source of carbon into the electrolytic cell; (d) introducing an iron-free, chromium-containing additive into the electrolyte media before the step of heating or introducing the iron-free additive into the molten electrolyte media, wherein the iron-free, chromium-containing additive is added in an amount of between about 0.05 wt % to about 2 wt %, relative to the amount of the electrolyte media or the molten electrolyte media; (e) applying an electrical current to the cathode and the anode in the electrolytic cell; and (f) collecting the CNM product from the cathode, wherein the CNM product comprises a minimum relative-amount of greater than 70% relative total weight of the CNM product of thin carbon nanotubes (tCNT) each tCNT with a diameter of 50 μm or less and a length of between about 25 μm to about 125 μm.

30 . The method of claim 29 , wherein the cathode comprises nickel and copper.

31 . The method of claim 29 , wherein the anode comprises iridium.

32 . The method of claim 29 , wherein the iron-free, chromium-containing additive is added in an amount of between about 0.5 wt % to about 1 wt %, relative to the amount of the electrolyte media or the molten electrolyte media.

33 . The method of claim 29 , wherein the electrical current is applied at a current density of between about 0.05 A/cm 2 and 0.1 A/cm 2 .

Assignees

• C2Cnt Llc

Inventors

• Licht Stuart
• Licht Gad

Classifications

• C01B32/15

  Nano-sized carbon materials · CPC title

• D01F9/12

  Carbon filaments; Apparatus specially adapted for the manufacture thereof · CPC title

• C01P2002/90

  Other crystal-structural characteristics not specified above · CPC title

• C01P2002/88

  by thermal analysis data, e.g. TGA, DTA, DSC · CPC title

• C01B2204/04

  Specific amount of layers or specific thickness · CPC title