Methods and systems for production of doped carbon nanomaterials

Patent metadata

Field	Value
Publication number	US-11732368-B2
Application number	US-202218053257-A
Country	US
Kind code	B2
Filing date	Nov 7, 2022
Priority date	Feb 21, 2017
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A system and process for producing doped carbon nanomaterials is disclosed. A carbonate electrolyte including a doping component is provided during the electrolysis between an anode and a cathode immersed in carbonate electrolyte contained in a cell. The carbonate electrolyte is heated to a molten state. An electrical current is applied to the anode, and cathode, to the molten carbonate electrolyte disposed between the anode and cathode. A morphology element maximizes carbon nanotubes, versus graphene versus carbon nano-onion versus hollow carbon nano-sphere nanomaterial product. The resulting carbon nanomaterial growth is collected from the cathode of the cell.

First claim

What is claimed is:

1. A method for producing a doped carbon nanomaterial comprising:
heating a carbonate electrolyte to obtain a molten carbonate electrolyte;
disposing the molten carbonate electrolyte between an anode and a cathode in a cell;
including a carbon nanomaterial doping component in the cell, the carbon nanomaterial component comprising one or more of boron chloride, borochlorate, boronitride, a salt thereof or any combination thereof;
applying an electrical current to the cathode and the anode in the cell; and
collecting the doped carbon nanomaterial growth from the cathode of the cell;

wherein atoms of the nanomaterial doping component introduced during the molten carbonate electrolysis are directly incorporated into the carbon nanomaterial building at the cathode during electrolysis to form the doped carbon nanomaterial, and
wherein the doped carbon nanomaterial is graphitic.

2. The method of claim 1 , wherein the doped carbon nanomaterial has desired chemical physical properties that are different from a dopant-free carbon nanomaterial, and wherein the desired chemical physical properties are a catalytic property selected from the group consisting of: a heterogeneous catalytic property, a homogeneous catalytic property, a fuel cell catalytic property, an aerobic oxidation catalytic property, an enhanced reaction activity property and any combination thereof.

3. The method of claim 1 , wherein the nanomaterial doping component is free of transition metal, the method further comprising application of an alternating electrical current to the molten carbonate electrolyte.

4. The method of claim 3 , wherein the electrical current is selected for doped carbon nano-onion product growth.

5. The method of claim 1 , further comprising adding ZnO to the molten carbonate electrolyte, and wherein the electrical current is selected for doped graphene platelet product growth.

6. The method of claim 1 , further comprising adding MgO to the molten carbonate electrolyte, and wherein the electrical current is selected for doped hollow carbon nano-sphere product growth.

7. The method of claim 1 , further comprising the step of including a nanomaterial selection component in the cell, wherein the nanomaterial selection component disperses a transition metal and wherein the nanomaterial selection component is selected for doped carbon nanotube product growth.

8. The method of claim 1 , wherein the carbon nanomaterial doping component includes at least one of a solid electrolyte additive, a liquid electrolyte additive, a gas electrolyte additive, a cathode material, or an anode material.

9. The method of claim 8 , wherein the carbon nanomaterial doping component is a solid salt, an element, or a covalent compound, wherein the doping component is dissolved, reacted or suspended in the electrolyte.

10. The method of claim 1 , wherein the carbon nanomaterial doping component includes more than one doping element.

11. The method of claim 10 , wherein the more than one doping element comprises at least one material with a group IIIA element, a non-carbon group IVA element, a group VA element, a group VIA chalcogenide element, or at least one material with gold, platinum, iridium, iron or other row 4, 5, or 6 metals.

12. The method of claim 1 , wherein said cathode or anode comprises at least one material or alloy selected from the group consisting of nickel, copper, chromium, iron, manganese, titanium, zinc, zirconium, molybdenum, tantalum, platinum, iridium, cobalt, silicon, and carbon pure metal.

13. The method of claim 1 , wherein said carbon nanomaterial doping component comprises a coating on the cathode or the anode.

Assignees

• C2Cnt Llc

Inventors

• Licht Stuart

Classifications

• C25B9/09

  Fused bath cells · CPC title

• C25B1/135 Primary

  Carbon · CPC title

• C01B32/184 Primary

  Preparation · CPC title

• C01B32/15

  Nano-sized carbon materials · CPC title

• C25B9/17

  Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof · CPC title