Products having sheets of 2d materials and related inks for direct ink writing

Patent metadata

Field	Value
Publication number	US-2024247147-A1
Application number	US-202418626163-A
Country	US
Kind code	A1
Filing date	Apr 3, 2024
Priority date	Jan 19, 2018
Publication date	Jul 25, 2024
Grant date	—

Abstract

An aerogel includes a three-dimensional printed structure having printed features comprised of two dimensional sheets of a graphene analogue.

First claim

What is claimed is:

1 . An aerogel, comprising:
a three-dimensional printed structure having printed features comprised of two dimensional sheets of a graphene analogue.

2 . An aerogel, as recited in claim 1 , wherein the sheets each have two perpendicular dimensions, an average of each dimension being at least 50 nm.

3 . An aerogel as recited in claim 1 , wherein an average thickness of the sheets is less than about 5 nm.

4 . An aerogel as recited in claim 1 , wherein the graphene analogue includes graphene.

5 . An aerogel as recited in claim 1 , wherein the graphene analogue includes a transition metal dichalcogenide.

6 . An aerogel as recited in claim 1 , wherein the graphene analogue includes a transition metal dichalcogenide and graphene.

7 . An aerogel as recited in claim 1 , wherein the graphene analogue includes boron nitride.

8 . An aerogel as recited in claim 1 , wherein the graphene analogue includes boron nitride and graphene.

9 . An aerogel as recited in claim 1 , wherein the graphene analogue includes boron nitride and a transition metal dichalcogenide.

10 . An aerogel as recited in claim 1 , wherein the printed features have substantially zero contaminants.

11 . An aerogel as recited in claim 1 , wherein the aerogel is electrically conductive.

12 . An aerogel as recited in claim 1 , wherein the aerogel has a surface area greater than 50 meter squared per gram.

13 . An aerogel as recited in claim 1 , wherein the aerogel comprises channels in at least one direction.

14 . An aerogel as recited in claim 1 , wherein the three-dimensional printed structure comprises a plurality of layers, each layer having a geometric arrangement of ligaments.

15 . An aerogel as recited in claim 14 , wherein an average diameter of the ligaments is in a range of 250 microns to about 1000 microns.

16 . An aerogel as recited in claim 1 , wherein the three-dimensional printed structure is a cubic lattice structure.

17 . An aerogel as recited in claim 16 , wherein the cubic lattice structure is characterized as having alternate orthogonal layers of parallel ligaments.

18 . A method for forming the aerogel of claim 1 , the method comprising:
obtaining an ink having the graphene analogue and/or a precursor of a graphene analogue, a thickener, and a solvent; forming a three-dimensional structure by direct ink writing using the ink; drying the formed three-dimensional structure; and thermal annealing the dried three-dimensional structure.

19 . A method as recited in claim 18 , wherein the ink comprises a gelling agent.

20 . A method as recited in claim 18 , wherein the method further comprises, before drying the formed three-dimensional structure, heating the three-dimensional structure for gelation of the three-dimensional structure; and exchanging the solvent.

Assignees

• L Livermore Nat Security Llc

Inventors

• Chandrasekaran Swetha
• Worsley Marcus A

Classifications

• C01P2004/20

  extending in two dimensions, e.g. plate-like · CPC title

• C01G39/06 Primary

  Sulfides · CPC title

• C01B2204/22

  Electronic properties · CPC title

• C01B2204/04

  Specific amount of layers or specific thickness · CPC title

• C01B2204/02

  Single layer graphene · CPC title