Nanocomposite of a nanoporous material and an active material and method of synthesizing thereof

Patent metadata

Field	Value
Publication number	US-2022223839-A1
Application number	US-202217657198-A
Country	US
Kind code	A1
Filing date	Mar 30, 2022
Priority date	Aug 14, 2017
Publication date	Jul 14, 2022
Grant date	—

Abstract

In an embodiment, an active material-based nanocomposite is synthesized by infiltrating an active material precursor into pores of a nanoporous carbon, metal or metal oxide material, and then annealing to decompose the active material precursor into a first gaseous material and an active material and/or another active material precursor infiltrated inside the pores. The nanocomposite is then exposed to a gaseous material or a liquid material to at least partially convert the active material and/or the second active material precursor into active material particles that are infiltrated inside the pores and/or to infiltrate a secondary material into the pores. The nanocomposite is again annealed to remove volatile residues, to enhance electrical contact within the active material-based nanocomposite composite and/or to enhance one or more structural properties of the nanocomposite. In a further embodiment, the pores may be further infiltrated with a filler material and/or may be at least partially sealed.

First claim

1 . An active material-based nanocomposite for using in an electrolyte-containing electrochemical energy storage device, comprising:
a nanoporous carbon, metal, or metal oxide material; active material particles infiltrated in pores of the nanoporous carbon, metal or metal oxide material; and a filler material infiltrated in the pores separately from the active material particles and/or a sealing material that at least partially closes the pores, wherein the active material particles comprise Fe, and wherein the active material particles comprise from about 30 vol. % to about 96 vol. % of a total volume of the active material-based nanocomposite.

2 . A method of synthesizing an active material-based nanocomposite for an electrolyte-containing electrochemical energy storage device, comprising:
infiltrating a first active material precursor into pores of a nanoporous carbon, metal or metal oxide material to produce the active material-based nanocomposite; annealing the active material-based nanocomposite at a first temperature to at least partially remove excess material of the first active material precursor from an external surface of the active material-based nanocomposite; annealing the active material-based nanocomposite at a second temperature to at least partially decompose the first active material precursor into a first gaseous material and an active material and/or a second active material precursor infiltrated inside the pores; exposing the active material-based nanocomposite to a second gaseous material or a liquid material to at least partially convert the active material and/or the second active material precursor into active material particles that are infiltrated inside the pores and/or to infiltrate a secondary material into the pores; and annealing the active material-based nanocomposite at a third temperature to remove volatile residues, to enhance electrical contact within the active material-based nanocomposite composite and/or to enhance one or more structural properties of the active material-based nanocomposite.

Assignees

• Sila Nanotechnologies Inc
• Georgia Tech Res Inst

Inventors

• Yushin Gleb
• LEI Danni

Classifications

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• B82Y30/00

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

• H01G11/24 Primary

  characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title