Products having sheets of 2D materials and related inks for direct ink writing
An aerogel includes a three-dimensional printed structure having printed features comprised of two dimensional sheets of a graphene analogue.
1 . An aerogel, comprising:
a three-dimensional printed structure having printed features comprised of a material having two dimensional sheets of a graphene analogue and/or graphene therein, wherein the printed features include extruded ligaments comprised of the material.
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 a transition metal dichalcogenide.
5 . An aerogel as recited in claim 1 , wherein the graphene analogue includes a transition metal dichalcogenide and graphene.
6 . An aerogel as recited in claim 1 , wherein the graphene analogue includes boron nitride.
7 . An aerogel as recited in claim 1 , wherein the graphene analogue includes boron nitride and graphene.
8 . An aerogel as recited in claim 1 , wherein the graphene analogue includes boron nitride and a transition metal dichalcogenide.
9 . An aerogel as recited in claim 1 , wherein the printed features have substantially zero contaminants.
10 . An aerogel as recited in claim 1 , wherein the aerogel is electrically conductive.
11 . An aerogel as recited in claim 1 , wherein the aerogel has a surface area greater than 50 meter squared per gram.
12 . An aerogel as recited in claim 1 , wherein the aerogel comprises channels in at least one direction.
13 . An aerogel as recited in claim 1 , wherein the three-dimensional printed structure comprises a plurality of layers, each layer having a predefined geometric arrangement of the ligaments.
14 . An aerogel, comprising:
a three-dimensional printed structure having printed features comprised of two dimensional sheets of a graphene analogue,
wherein the three-dimensional printed structure comprises a plurality of layers, each layer having a geometric arrangement of ligaments,
wherein an average diameter of the ligaments is in a range of 250 microns to about 1000 microns.
15 . An aerogel as recited in claim 1 , wherein the three-dimensional printed structure is a cubic lattice structure.
16 . An aerogel as recited in claim 15 , wherein the cubic lattice structure is characterized as having alternate orthogonal layers of parallel ligaments.
17 . 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.
18 . A method as recited in claim 17 , wherein the ink comprises a gelling agent.
19 . A method as recited in claim 17 , 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.