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

Patent metadata

Field	Value
Publication number	US-2025043434-A1
Application number	US-202418614286-A
Country	US
Kind code	A1
Filing date	Mar 22, 2024
Priority date	Nov 24, 2021
Publication date	Feb 6, 2025
Grant date	—

Abstract

A method for producing a carbon nanomaterial product comprising: 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, nickel-free, chromium-containing additive into the electrolyte media before the step of heating or introducing the iron-free, nickel-free chromium-containing additive into the molten electrolyte media, in which the iron-free, nickel-free, chromium-containing additive is added in an amount of between 0.05 wt % and 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, the CNM product comprises a minimum relative-amount of between 50 wt % and 99 wt %, relative to a total weight of the CNM product of nano-carbon flowers.

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, nickel-free, chromium-containing additive into the electrolyte media before the step of heating or introducing the iron-free, nickel-free chromium-containing additive into the molten electrolyte media, wherein the iron-free, nickel-free, chromium-containing additive is added in an amount of between 0.05 wt % and 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 between 50 wt % and 99 wt %, relative to a total weight of the CNM product of nano-carbon flowers.

30 . The method of claim 29 , wherein the anode comprises nickel.

31 . The method of claim 29 or claim 30 , wherein the cathode comprises copper and zinc.

32 . The method of claim 29 , wherein the electrical current has a current density of between about 0.05 A/cm 2 and 0.15 A/cm 2 .

33 . The method of claim 29 , wherein the iron-free, nickel-free, chromium-containing additive is added as a powder.

34 . The method of claim 29 , wherein the iron-free, nickel-free, chromium-containing additive is added in an amount of between 0.1 wt % and 1.5 wt %, relative to the amount of the electrolyte media or the molten electrolyte media.

35 . The method of claim 29 , wherein the step of applying the electrical current occurs for between 15 and 25 hours before the step of introducing the iron-free, nickel-free, chromium-containing additive.

36 . The method of claim 29 , further comprising a step of aging the molten electrolyte media for between about 10 hours and about 30 hours before the step of applying the electrical current.

37 . The method of claim 29 , further comprising a step of washing the CNM product to remove molten electrolyte from the nano-carbon flowers.

38 . The method of claim 29 , further comprising a step of introducing a magnetic additive component into the electrolytic cell, wherein the magnetic additive component comprises a magnetic material addition component, a carbide-growth component or any combination thereof and wherein the nano-carbon flowers are magnetic and move when in a magnetic field.

39 . The method of claim 29 , further comprising a step of introducing a doping additive component into the electrolytic cell, wherein the nano-carbon flowers are doped and atoms of the doping additive component are directly incorporated throughout the nano-carbon flowers to impart desired physical and/or chemical properties to the nano-carbon flowers that are different than an undoped nano-carbon flowers.

40 . The method of claim 29 , wherein the nano-carbon flowers each comprise multiple, frusto-conical carbon nanotubes that originates from a single point of origin.

41 . The method of claim 38 , wherein each of the multiple, frusto-conical carbon nanotubes has a diameter that decreases as each frusto-conical carbon nanotubes extends away from the single point of origin.

42 . The method of claim 29 , wherein the nano-carbon flowers have an I D /I G ratio of between about 0.6 to about 0.9, as measured by Raman spectroscopy.

43 . A carbon nanomaterial comprising nano-carbon flowers, wherein each nano-carbon flower comprises multiple, frusto-conical carbon nanotubes that originates from a single point of origin.

44 . The carbon nanomaterial of claim 43 , wherein each of the multiple, frusto-conical carbon nanotubes has a diameter that decreases as each frusto-conical carbon nanotubes extends away from the single point of origin.

45 . The carbon nanomaterial of claim 43 , wherein the nano-carbon flowers have an I D /I G ratio of between about 0.6 to about 0.9, as measured by Raman spectroscopy.

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