Electrolysis methods that utilize carbon dioxide and a high nickel-content anode for making desired nanocarbon allotropes

Patent metadata

Field	Value
Publication number	US-12291786-B2
Application number	US-202418664639-A
Country	US
Kind code	B2
Filing date	May 15, 2024
Priority date	Nov 24, 2021
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A method for producing a carbon nanomaterial (CNM) product includes: heating an electrolyte media to obtain a molten electrolyte media; positioning the molten electrolyte media between a high-nickel content anode and a cathode of an electrolytic cell; introducing a source of carbon into the electrolytic cell; applying an electric current to the cathode and the anode in the electrolytic cell; and collecting the CNM product from the cathode, in which the CNM product comprises a minimal relative-amount of at least 70 wt %, as compared to a total weight of the CNM product, of hollow nano-onion product, in which the high-nickel content anode is made of pure nickel or an alloy that comprises greater than 50 wt % nickel.

First claim

We claim:

1. 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. adding at least 0.8 wt % of a nickel-containing additive to the electrolyte media or the molten electrolyte media;
c. positioning the molten electrolyte media between a high-nickel content anode and a cathode of an electrolytic cell;
d. introducing a source of carbon into the electrolytic cell;
e. applying an electric 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 minimal relative-amount of at least 70 wt %, as compared to a total weight of the CNM product, of hollow nano-onion product,
wherein the high-nickel content anode is made of pure nickel or an alloy that comprises greater than 50 wt % nickel.

2. The method of claim 1 , wherein the anode is made of any alloy that comprises nickel, iron and chromium.

3. The method of claim 1 , wherein the electric current is applied at a current density of between about 0.05 A/cm 2 and 0.12 A/cm 2 .

4. The method of claim 1 , wherein the hollow nano-onion product defines an internal hollow core.

5. The method of claim 1 , wherein the hollow nano-onion product has an I D /I G ratio of between about 0.2 to about 0.4, 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