US 12,665,196 B2 · Method of synthesizing porous composite including single atom metal catalysts and nitrogen atoms in hierarchical carbon material from carbon dioxide containing gas

Abstract

The present invention relates to a method of producing a porous composite comprising single-atom metal catalysts and nitrogen atoms by using a hierarchical carbon material from a carbon dioxide-containing gas. According to the present invention, a composite material is produced by producing a porous carbon material using nanosized templates and carbon dioxide, producing carbon nanotubes from the composite material through a self-templating process, and adding single-atom catalysts to the carbon nanofibers. In addition, it is possible to produce a composite having significantly improved porous characteristics and electrochemical properties by nitrogen atom doping using a nitrogen precursor. The produced composite may be easily applied to a high-energy storage device such as a lithium-sulfur battery.

Claims4

Dependent claims

A method of preparing an amorphous hierarchical porous carbon material having micropores (<2 nm) and mesopores (2 to 50 nm), comprising

continuous heat-treating a mixture of a reducing agent and nanotemplates in an inert gas and a carbon dioxide-containing gas at a temperature of 500 to 1,000° C. to obtain a solid product;
and
adding a nitrogen precursor to the obtained solid product, followed by heat treatment,
wherein the heat treatment is treated with ammonia gas generated by bubbling an aqueous ammonia solution so that a percentage of nitrogen atoms in the solid product increases from 1-2 at % to 4-7 at %, and a content of nitrogen atoms in the solid product increases from 0.5-2.0 wt % to 3.0-6.0 wt %.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/811,583Filed 9 Jul 2022

Priority

KR 10-2021-011087323 Aug 2021

Published

US 2023/0055011 A123 Feb 2023

Granted

23 Jun 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

H01M 4/587
Carbonaceous material, e.g. graphite-intercalation compounds or CFx: for inserting or intercalating light metals
C01B 32/348
Characterised by non-gaseous activating agents: metallic compounds
C01B 32/372
After-treatment: coating; Grafting; Microencapsulation
H01M 4/364
Composites: as mixtures

Method of synthesizing porous composite including single atom metal catalysts and nitrogen atoms in hierarchical carbon material from carbon dioxide containing gas

Life of this patent

Method of synthesizing porous composite including single atom metal catalysts and nitrogen atoms in hierarchical carbon material from carbon dioxide containing gas

Life of this patent

Abstract

Claims4