METHODS AND APPLICATIONS FOR CONDUCTIVE GRAPHENE INKS

Maher F. El-Kady

Patent

Atlas literature

Patent

US 11,299,645

METHODS AND APPLICATIONS FOR CONDUCTIVE GRAPHENE INKS

Maher F. El-Kady

Drawings

Patent drawings and their descriptions. Click a drawing to enlarge it.

FIG. 1

FIG. 1 shows an illustration of the composition of an exemplary conductive graphene ink, in accordance with some embodiments of the present disclosure. [0216]

FIG. 2

FIG. 2C shows an exemplary schematic illustration of the chemical interactions between binder and the components of the graphene ink, in accordance with some …

FIG. 3

FIG. 3B shows an exemplary transmission electron microscopy (TEM) image of a commercially available form of carbon black, in accordance with some embodiments …

FIG. 4

FIG. 4 shows an exemplary image of raw graphene, in accordance with some embodiments transmission electron microscopy, which is used to make the graphene sheet …

FIG. 5

FIG. 5A shows an image of an exemplary conductive graphene ink being removed from a mixer, in accordance with some embodiments of the present disclosure. [0225]

FIG. 6

FIG. 6B shows a second optical microscopy image of an exemplary conductive graphene ink, in accordance with some embodiments of the present disclosure. [0229]

FIG. 7

FIG. 7A shows a ﬁrst high-magniﬁcation scanning electron microscopy (SEM) image of an exemplary conductive graphene ink, in accordance with some embodiments of …

FIG. 8

FIG. 8 shows an image of an exemplary apparatus for forming a conductive graphene ink, in accordance with some embodiments of the present disclosure. [0234]

FIG. 9

FIG. 9 shows a particle size distribution chart of an exemplary conductive graphene ink. [0235]

FIG. 10

FIG. 10 shows a Raman spectra chart of an exemplary conductive graphene ink, in accordance with some embodiments of the present disclosure. [0236]

FIG. 11

FIG. 11 shows an X-ray diﬀraction chart of an exemplary conductive graphene ink, in accordance with some embodiments of the present disclosure. [0237]

FIG. 12

FIG. 12B shows an image of an exemplary roll of a conductive graphene ink-coated substrate, in accordance with some embodiments of the present disclosure. …

FIG. 13

FIG. 13 shows an image of an exemplary graphene ﬁlm comprising a conductive graphene logo on an exemplary substrate, in accordance with some embodiments of the …

FIG. 14

FIG. 14A shows an image of an exemplary graphene ﬁlms comprising arrays of two interdigitated electrodes formed from an exemplary conductive graphene ink and …

FIG. 15

FIG. 15A shows an image of an exemplary radio frequency identiﬁcation device printed on an exemplary conductive graphene ink on an exemplary paper substrate, …

FIG. 16

FIG. 16 shows a schematic illustration of an exemplary method of forming a graphene ﬁlm, in accordance with some embodiments of the present disclosure. [0245]

FIG. 17

FIG. 17 shows an image of an exemplary method of forming a graphene ﬁlm with a brush, in accordance with some embodiments of the present disclosure. [0246]

FIG. 18

FIG. 18 shows an illustration of an exemplary method of forming a graphene ﬁlm with a doctor blade, in accordance with some embodiments of the present …

FIG. 19

FIG. 19B shows an image of an exemplary graphene ﬁlm formed with a doctor blade, in accordance with some embodiments of the present disclosure. [0249]

FIG. 20

FIG. 20 shows an image of an exemplary method of coating a substrate with graphene ink with a screen printer, in accordance with some embodiments of the …

FIG. 21

FIG. 21B shows an image of an exemplary graphene ink coating an exemplary substrate in a roll-to-roll printer, in accordance with some embodiments of the …

FIG. 22

FIG. 22 shows a plot of the sheet resistance and dry thickness of an exemplary conducting graphene coating, in accordance with some embodiments of the present …

FIG. 23

FIG. 23 shows an current-voltage plot of an exemplary conducting graphene coating, in accordance with some embodiments of the present disclosure. [0255]

FIG. 24

performance graph

FIG. 24B shows a graph of the sheet resistance of exemplary conducting graphene- coated substrates with a wet coating thickness of 200 micrometers, in …

FIG. 25

FIG. 25 shows an exemplary apparatus for testing the resistance of a conductive graphene ink coated on a substrate, in accordance with some embodiments of the …

FIG. 26

FIG. 26D shows an illustration of the concave bending radius of an exemplary graphene-coated substrate, in accordance with some embodiments of the present …

FIG. 27

performance graph

FIG. 27A shows a graph of the resistance change of exemplary ﬂat, bent, and twisted graphene-coated substrates, in accordance with some embodiments of the …

FIG. 28

FIG. 28 shows a plot of the bend cycles at a radius of about 10 mm and the resistance change of an exemplary graphene-coated substrate, in accordance with some …

FIG. 29

FIG. 29C is an illustration of a conductive graphene ink comprising silver nanoparticles with a percolation threshold of less than 1%, in accordance with some …

FIG. 30

FIG. 30 shows TEM images of exemplary silver nanowires formed by immediately injecting the silver-based solution into the reaction vessel, in accordance with …

FIG. 31

FIG. 31A displays an exemplary solution comprising silver nanowires formed by immediately injecting the silver-based solution into the reaction vessel, in …

FIG. 32

FIG. 32 shows TEM images of exemplary silver nanowires formed by injecting the silver- based solution into the reaction vessel over a period of time of about …

FIG. 33

FIG. 33A displays an exemplary solution comprising silver nanowires formed by immediately injecting the silver-based solution into the reaction vessel, in …

FIG. 34

FIG. 34 shows TEM images of exemplary silver nanowires formed with a high viscosity binder, in accordance with some embodiments of the present disclosure. …

FIG. 35

FIG. 35 shows an image of an exemplary conductive silver-based ink comprising silver nanowires formed with a high viscosity binder, in accordance with some …

FIG. 36

FIG. 36 shows optical microscope images of an exemplary ﬁlm comprising silver nanowires formed by a solvothermal method, in accordance with some embodiments of …

FIG. 37

FIG. 37 shows an image of an exemplary conductive silver-based ink comprising silver nanowires formed with a high viscosity binder, in accordance with some …

FIG. 38

FIG. 38 shows an image of an exemplary apparatus for forming silver nanowires formed by a solvothermal method, in accordance with some embodiments of the …

FIG. 39

FIG. 39 shows TEM images of exemplary silver nanowires formed with an ionic liquid catalyst, in accordance with some embodiments of the present disclosure. …

FIG. 40

FIG. 40A shows an image of an exemplary conductive silver-based ink during seeding and nucleation of the silver nanowires formed with an ionic liquid catalyst, …

FIG. 41

FIG. 41B shows another TEM image of exemplary silver nanowires formed with controlled nucleation and growth, in accordance with some embodiments of the present …

FIG. 42

FIG. 42B shows an image of an exemplary conductive additive comprising silver nanowires at nucleation initiation, in accordance with some embodiments of the …

FIG. 43

FIG. 43A shows a front image of an exemplary apparatus for forming a conductive additive comprising silver nanowires, in accordance with some embodiments of …

FIG. 44

FIG. 44 shows a TEM image of exemplary silver nanoparticles formed by a ﬁrst method of silver nanoparticle formation, in accordance with some embodiments of …

FIG. 45

FIGS. 45B shows a second image of an exemplary dispersion of silver nanoparticles formed by a ﬁrst method of silver nanoparticle formation, in accordance with …

FIG. 46

FIG. 46A shows an image of an exemplary ﬁrst solution of silver nanoparticles heated to 100 0 C, in accordance with some embodiments of the present disclosure. …

FIG. 47

FIG. 47 shows a TEM image of exemplary silver nanoparticles formed by a second method of silver nanoparticle formation, in accordance with some embodiments of …

FIG. 48

FIG. 48 shows an current-voltage curve of an exemplary ﬁlm comprising an exemplary conductive graphene ink, in accordance with some embodiments of the present …

Claims

Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.

9 independent · 12 dependent

1
Independentconductive graphene inkreduced graphene oxidebinder solution
A conductive graphene ink comprising: a) 20% to about 70% by mass of a binder solution comprising a binder and a ﬁrst solvent; and b) a reduced graphene oxide dispersion comprising reduced graphene oxide, and a second solvent; wherein the conductive graphene ink has a viscosity of at least about 1,000 centipoise. Currently amended
1. 2
  Dependent← claim 1solvent
  The conductive graphene ink of claim 1, wherein at least one of the ﬁrst solvent[[,]] and the second solvent comprises water, ethanol, isopropyl alcohol, N-methyl-2-pyrrolidone, cyclohexanone, terpineol, 3-methoxy-3-methyl- 1 -butanol, 4-hydroxyl-4-methyl-pentan-2-one, methyl isobutyl ketone, or any combination thereof. Currently amended
2. 3
  Dependent← claim 1binder
  The conductive graphene ink of claim 1, wherein the binder comprises carboxymethyl cellulose, polyvinylidene ﬂuoride, poly(vinyl alcohol), poly(vinyl pyrrolidone), poly(ethylene oxide), ethyl cellulose, or any combination thereof. Original
3. 7
  Dependent← claim 1conductive graphene ink
  The conductive graphene ink of claim 1, wherein the conductive graphene ink has a viscosity of at most about 10,000 centipoise. Original
4. 8
  Dependent← claim 1conductive graphene ink
  The conductive graphene ink of claim 1, wherein the conductive graphene ink has a C: O mass ratio of about 2:1 to about 40:1 2. Currently amended
4
Independent
. Canceled
5
Independent
. Canceled
6
Independent
. Canceled
9
Independentconductive graphene inkreduced graphene oxidebinder solution
A method of forming a conductive graphene ink comprising: forming a binder solution comprising: heating a ﬁrst solvent; adding a binder to the ﬁrst solvent; mixing the binder and the ﬁrst solvent; and cooling the binder and the ﬁrst solvent; forming a reduced graphene oxide dispersion comprising a second solvent and reduced graphene oxide; forming a graphene solution comprising the binder solution[[,]] and the reduced graphene oxide dispersion; and mixing the graphene solution under a vacuum degree of about -0.05 MPa to about -0.2 MPa to form a conductive graphene ink. Currently amended
1. 10
  Dependent← claim 9solvent
  The method of claim 9, wherein at least one of the ﬁrst solvent[[,]] and the second solvent comprises water, ethanol, isopropyl alcohol, N-methyl-2-pyrrolidone, cyclohexanone, terpineol, 3-methoxy-3-methyl- i -butanol, 4- hydroxyl-4-methyl-pentan-2-one, methyl isobutyl ketone, or any combination thereof. Currently amended
2. 11
  Dependent← claim 9binder
  The method of claim 9, wherein the binder comprises carboxymethyl cellulose, polyvinylidene ﬂuoride, poly(vinyl alcohol), poly(vinyl pyrrolidone), poly(ethylene oxide), ethyl cellulose, or any combination thereof. Original
3. 15
  Dependent← claim 9
  The method of claim 9, wherein the ﬁ rst solvent is heated to a temperature of about 35 0 C to about 125 0 C. Original
4. 16
  Dependent← claim 9
  The method of claim 9, wherein the binder is added to the ﬁ rst solvent during the mixing of the binder and the ﬁ rst solvent, over a period of time of about 45 minutes to about 240 minutes. Original
5. 17
  Dependent← claim 9
  The method of claim 9, wherein, after the binder is fully added to the ﬁ rst solvent, the binder and the ﬁ rst solvent are mixed for a period of time of about 7 minutes to about 30 minutes. Original
6. 18
  Dependent← claim 9
  The method of claim 9, wherein the mixing of the graphene solution is performed with at least one of a stirring speed of about 15 rpm to about 125 rpm, and a dispersing speed of about rpm to about 4,500 rpm. Original
7. 20
  Dependent← claim 9
  The method of claim 9, wherein the graphene solution is mixed during one or more intervals, wherein each interval comprises a period of time of about 0.5 minutes to about 30 minutes. Original
8. 21
  Dependent← claim 9
  The method of claim 9, wherein the binder and the ﬁrst solvent are cooled to a temperature of about 10 0 C to about 40 0 C. Original
12
Independent
. Canceled
13
Independent
. Canceled
14
Independent
. Canceled
19
Independent
. Canceled

Materials

Materials described outside the worked examples.

conductive graphene ink

Primary Ink Composition

reduced graphene oxide

Conductive Filler

Process steps

Additional fabrication and treatment steps described in the patent.

Ink Formulation

Step 1

Temperature

35, 125°C

Duration

45, 240 min

Process details

temperature c max:40

temperature c min:

Characterization

Measurements and analyses referenced in the patent, with their drawing references.

tem

TEM

FIG. 3B shows an exemplary transmission electron microscopy (TEM) image of a commercially available form of carbon black, in accordance with some embodiments …

Figure references

FIG. 3

tem

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
conductive graphene ink viscosity (claimed range)	1000–10000	conductive graphene ink
C:O mass ratio of conductive graphene ink (claimed range)	2–40

Why these are connected

Related documents with shared materials, methods, properties, or citations.

METHODS AND APPLICATIONS FOR CONDUCTIVE GRAPHENE INKS | Matter42 Literature