Nanostructured silicon carbonaceous composite material and methods for producing the same

Patent metadata

Field	Value
Publication number	US-12030780-B2
Application number	US-202117393660-A
Country	US
Kind code	B2
Filing date	Aug 4, 2021
Priority date	Aug 7, 2020
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

Described herein is a nanostructured silicon carbonaceous composite material and methods for producing the same. The methods include formation of a metal organic framework/silica (MOF/SiO 2 ) intermediate material and conversion of the MOF/SiO 2 intermediate material to the nanostructured silicon carbonaceous composite material. Relatively inexpensive and/or recycled materials can be used as precursors in manufacturing the nanostructured silicon carbon composition material, which can be used in various applications, including as silicon anode material in a lithium-ion battery.

First claim

The invention claimed is:

1. A method of making a nanostructured silicon carbonaceous composite material comprising
contacting a metal-silica precursor with an organic ligand in water to form an aqueous mixture, wherein the organic ligand comprises terephthalic acid derived from polyethylene terephthalate (PET), wherein the metal-silica precursor comprises a metal oxide confined in silica or a metal silicate,
heating the aqueous mixture at a temperature ranging from about 25° C. to 300° C. thereby forming a nano-crystalline metal organic framework/silica intermediate material, and
contacting the nano-crystalline metal organic framework/silica intermediate material with magnesium at a temperature ranging from about 600° C. to 800° C. thereby forming the nanostructured silicon carbonaceous composite material.

2. The method of claim 1 , wherein the metal oxide confined in silica is synthetic metal oxide.

3. The method of claim 1 , wherein the metal silicate is mineral metal silicate.

4. The method of claim 3 , wherein the mineral metal silicate comprises halloysite or kaolinite.

5. The method of claim 3 , wherein the mineral metal silicate comprises asbestos, fly ash, or bottom ash.

6. The method of claim 1 , wherein the metal-silica precursor is selected such that the resulting nanostructured silicon carbonaceous composite material has a silicon content greater than 50 wt %.

7. The method of claim 1 , wherein the metal-silica precursor and organic ligand are also contacted with organic solvent.

8. The method of claim 7 , wherein the organic solvent comprises methanol, ethanol, tetrahydrofuran, N,N-dimethylformamide, N,N-dimethylacetamide, acetonitrile, or acetone.

9. The method of claim 1 , wherein the temperature for heating the aqueous mixture ranges from about 25° C. to about 250° C.

Assignees

• Res Triangle Inst

Inventors

• Luz-Minguez Ignacio
• Soukri Mustapha
• Dausch David

Classifications

• C01P2002/82

  by IR- or Raman-data · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C01P2006/40

  Electric properties · CPC title

• C01P2006/14

  Pore volume · CPC title

• C01P2004/80

  Particles consisting of a mixture of two or more inorganic phases · CPC title