Patent
US 10,858,746METHOD OF MANUFACTURING GRAPHENE BY DC SWITCHING
Wonoh LEE
US
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Patent
Atlas literature
Patent
US 10,858,746Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1, a platinum (Pt) electrode as a cathode and an exfoliated graphite electrode as an anode were used, and the two electrodes were dipped into an aqueous …
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Cu rr ently amended) A method of manufacturing graphene, the method comprising: dipping a cathode including metal and an anode including graphite into an electrolyte; and applying a DC power supply between the cathode and the anode, wherein the DC power supply is a DC switching power supply applying a positive (+) voltage and a negative (-) voltage alternately and repetitively, wherein an absolute value of the negative (-) voltage is the same as or less than that of the positive (+) voltage, wherein, if an absolute value of the negative (-) voltage is the same as that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is in a range from 5:1 to 2:1, and wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, the time of applying the positive (+) voltage is the same as or longer than that of the negative (-) voltage. Currently amended
(Cu rr ently amended) The method of claim 1, wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is 5:1 to 1:1. Currently amended
Canceled
Canceled
Canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials1 process step
Platinum (Pt) electrode as cathode and exfoliated graphite electrode as anode dipped into aqueous sulfuric acid solution. DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 10 seconds applied between electrodes. Graphene obtained at a rate of 2.495 mg/min after washing and drying.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 15 seconds. Graphene obtained at a rate of 3.235 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 17 times +20V for 50 seconds and -20V for 20 seconds. Graphene obtained at a rate of 3.055 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 16 times +20V for 50 seconds and -20V for 25 seconds. Graphene obtained at a rate of 1.935 mg/min.
3 materials1 process step
Same as Example 1 except expanded graphite electrode used as anode and DC switching power supply alternately repeating 2 times +30V for 45 seconds and -10V for 45 seconds. Graphene obtained at a rate of 2.920 mg/min.
4 materials1 process step
Same as Example 1 except constant DC power supply applying +20V for 1,200 seconds. Graphene obtained at a rate of 1.750 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 5 seconds. Graphene obtained at a rate of 1.680 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 15 times +20V for 50 seconds and -20V for 30 seconds. Graphene obtained at a rate of 1.290 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 12 times +20V for 50 seconds and -20V for longer negative time. Graphene obtained at a rate of 1.335 mg/min.
Materials described outside the worked examples.
graphite
metal
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene production rate-Example 1 | 2.495 mg/min | graphene |
graphene production rate-Example 2 |
Table 1
SVG
The following Table 1 shows power supply conditions and yields of the above- ment
p. 8
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,858,746Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1, a platinum (Pt) electrode as a cathode and an exfoliated graphite electrode as an anode were used, and the two electrodes were dipped into an aqueous …
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Cu rr ently amended) A method of manufacturing graphene, the method comprising: dipping a cathode including metal and an anode including graphite into an electrolyte; and applying a DC power supply between the cathode and the anode, wherein the DC power supply is a DC switching power supply applying a positive (+) voltage and a negative (-) voltage alternately and repetitively, wherein an absolute value of the negative (-) voltage is the same as or less than that of the positive (+) voltage, wherein, if an absolute value of the negative (-) voltage is the same as that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is in a range from 5:1 to 2:1, and wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, the time of applying the positive (+) voltage is the same as or longer than that of the negative (-) voltage. Currently amended
(Cu rr ently amended) The method of claim 1, wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is 5:1 to 1:1. Currently amended
Canceled
Canceled
Canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials1 process step
Platinum (Pt) electrode as cathode and exfoliated graphite electrode as anode dipped into aqueous sulfuric acid solution. DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 10 seconds applied between electrodes. Graphene obtained at a rate of 2.495 mg/min after washing and drying.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 15 seconds. Graphene obtained at a rate of 3.235 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 17 times +20V for 50 seconds and -20V for 20 seconds. Graphene obtained at a rate of 3.055 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 16 times +20V for 50 seconds and -20V for 25 seconds. Graphene obtained at a rate of 1.935 mg/min.
3 materials1 process step
Same as Example 1 except expanded graphite electrode used as anode and DC switching power supply alternately repeating 2 times +30V for 45 seconds and -10V for 45 seconds. Graphene obtained at a rate of 2.920 mg/min.
4 materials1 process step
Same as Example 1 except constant DC power supply applying +20V for 1,200 seconds. Graphene obtained at a rate of 1.750 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 5 seconds. Graphene obtained at a rate of 1.680 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 15 times +20V for 50 seconds and -20V for 30 seconds. Graphene obtained at a rate of 1.290 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 12 times +20V for 50 seconds and -20V for longer negative time. Graphene obtained at a rate of 1.335 mg/min.
Materials described outside the worked examples.
graphite
metal
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene production rate-Example 1 | 2.495 mg/min | graphene |
graphene production rate-Example 2 |
Table 1
SVG
The following Table 1 shows power supply conditions and yields of the above- ment
p. 8
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,858,746Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1, a platinum (Pt) electrode as a cathode and an exfoliated graphite electrode as an anode were used, and the two electrodes were dipped into an aqueous …
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Cu rr ently amended) A method of manufacturing graphene, the method comprising: dipping a cathode including metal and an anode including graphite into an electrolyte; and applying a DC power supply between the cathode and the anode, wherein the DC power supply is a DC switching power supply applying a positive (+) voltage and a negative (-) voltage alternately and repetitively, wherein an absolute value of the negative (-) voltage is the same as or less than that of the positive (+) voltage, wherein, if an absolute value of the negative (-) voltage is the same as that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is in a range from 5:1 to 2:1, and wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, the time of applying the positive (+) voltage is the same as or longer than that of the negative (-) voltage. Currently amended
(Cu rr ently amended) The method of claim 1, wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is 5:1 to 1:1. Currently amended
Canceled
Canceled
Canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials1 process step
Platinum (Pt) electrode as cathode and exfoliated graphite electrode as anode dipped into aqueous sulfuric acid solution. DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 10 seconds applied between electrodes. Graphene obtained at a rate of 2.495 mg/min after washing and drying.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 15 seconds. Graphene obtained at a rate of 3.235 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 17 times +20V for 50 seconds and -20V for 20 seconds. Graphene obtained at a rate of 3.055 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 16 times +20V for 50 seconds and -20V for 25 seconds. Graphene obtained at a rate of 1.935 mg/min.
3 materials1 process step
Same as Example 1 except expanded graphite electrode used as anode and DC switching power supply alternately repeating 2 times +30V for 45 seconds and -10V for 45 seconds. Graphene obtained at a rate of 2.920 mg/min.
4 materials1 process step
Same as Example 1 except constant DC power supply applying +20V for 1,200 seconds. Graphene obtained at a rate of 1.750 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 5 seconds. Graphene obtained at a rate of 1.680 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 15 times +20V for 50 seconds and -20V for 30 seconds. Graphene obtained at a rate of 1.290 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 12 times +20V for 50 seconds and -20V for longer negative time. Graphene obtained at a rate of 1.335 mg/min.
Materials described outside the worked examples.
graphite
metal
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene production rate-Example 1 | 2.495 mg/min | graphene |
graphene production rate-Example 2 |
Table 1
SVG
The following Table 1 shows power supply conditions and yields of the above- ment
p. 8
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 10,858,746Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1, a platinum (Pt) electrode as a cathode and an exfoliated graphite electrode as an anode were used, and the two electrodes were dipped into an aqueous …
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Cu rr ently amended) A method of manufacturing graphene, the method comprising: dipping a cathode including metal and an anode including graphite into an electrolyte; and applying a DC power supply between the cathode and the anode, wherein the DC power supply is a DC switching power supply applying a positive (+) voltage and a negative (-) voltage alternately and repetitively, wherein an absolute value of the negative (-) voltage is the same as or less than that of the positive (+) voltage, wherein, if an absolute value of the negative (-) voltage is the same as that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is in a range from 5:1 to 2:1, and wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, the time of applying the positive (+) voltage is the same as or longer than that of the negative (-) voltage. Currently amended
(Cu rr ently amended) The method of claim 1, wherein, if an absolute value of the negative (-) voltage is less than that of the positive (+) voltage, a ratio of the times of applying the positive (+) voltage and the negative (-) voltage is 5:1 to 1:1. Currently amended
Canceled
Canceled
Canceled
Embodiments described in the patent, grouped by the materials and process steps they use.
4 materials1 process step
Platinum (Pt) electrode as cathode and exfoliated graphite electrode as anode dipped into aqueous sulfuric acid solution. DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 10 seconds applied between electrodes. Graphene obtained at a rate of 2.495 mg/min after washing and drying.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 15 seconds. Graphene obtained at a rate of 3.235 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 17 times +20V for 50 seconds and -20V for 20 seconds. Graphene obtained at a rate of 3.055 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 16 times +20V for 50 seconds and -20V for 25 seconds. Graphene obtained at a rate of 1.935 mg/min.
3 materials1 process step
Same as Example 1 except expanded graphite electrode used as anode and DC switching power supply alternately repeating 2 times +30V for 45 seconds and -10V for 45 seconds. Graphene obtained at a rate of 2.920 mg/min.
4 materials1 process step
Same as Example 1 except constant DC power supply applying +20V for 1,200 seconds. Graphene obtained at a rate of 1.750 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 20 times +20V for 50 seconds and -20V for 5 seconds. Graphene obtained at a rate of 1.680 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 15 times +20V for 50 seconds and -20V for 30 seconds. Graphene obtained at a rate of 1.290 mg/min.
4 materials1 process step
Same as Example 1 except DC switching power supply alternately repeating 12 times +20V for 50 seconds and -20V for longer negative time. Graphene obtained at a rate of 1.335 mg/min.
Materials described outside the worked examples.
graphite
metal
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4 is an atomic force microscope (A F M) image of a graphene sheet manufactured according to Example 5 of the present disclosure.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
graphene production rate-Example 1 | 2.495 mg/min | graphene |
graphene production rate-Example 2 |
Table 1
SVG
The following Table 1 shows power supply conditions and yields of the above- ment
p. 8
Related documents with shared materials, methods, properties, or citations.
| 3.235 mg/min |
graphene |
graphene production rate-Example 3 | 3.055 mg/min | graphene |
graphene production rate-Example 4 | 1.935 mg/min | graphene |
graphene production rate-Example 5 | 2.92 mg/min | graphene |
graphene production rate-Comparative Example 1 (constant DC) | 1.75 mg/min | graphene |
graphene production rate-Comparative Example 2 | 1.68 mg/min | graphene |
graphene production rate-Comparative Example 3 | 1.29 mg/min | graphene |
graphene production rate-Comparative Example 4 | 1.335 mg/min | graphene |
METHOD FOR FABRICATING GRAPHENE
| 3.235 mg/min |
graphene |
graphene production rate-Example 3 | 3.055 mg/min | graphene |
graphene production rate-Example 4 | 1.935 mg/min | graphene |
graphene production rate-Example 5 | 2.92 mg/min | graphene |
graphene production rate-Comparative Example 1 (constant DC) | 1.75 mg/min | graphene |
graphene production rate-Comparative Example 2 | 1.68 mg/min | graphene |
graphene production rate-Comparative Example 3 | 1.29 mg/min | graphene |
graphene production rate-Comparative Example 4 | 1.335 mg/min | graphene |
METHOD FOR FABRICATING GRAPHENE
| 3.235 mg/min |
graphene |
graphene production rate-Example 3 | 3.055 mg/min | graphene |
graphene production rate-Example 4 | 1.935 mg/min | graphene |
graphene production rate-Example 5 | 2.92 mg/min | graphene |
graphene production rate-Comparative Example 1 (constant DC) | 1.75 mg/min | graphene |
graphene production rate-Comparative Example 2 | 1.68 mg/min | graphene |
graphene production rate-Comparative Example 3 | 1.29 mg/min | graphene |
graphene production rate-Comparative Example 4 | 1.335 mg/min | graphene |
METHOD FOR FABRICATING GRAPHENE
| 3.235 mg/min |
graphene |
graphene production rate-Example 3 | 3.055 mg/min | graphene |
graphene production rate-Example 4 | 1.935 mg/min | graphene |
graphene production rate-Example 5 | 2.92 mg/min | graphene |
graphene production rate-Comparative Example 1 (constant DC) | 1.75 mg/min | graphene |
graphene production rate-Comparative Example 2 | 1.68 mg/min | graphene |
graphene production rate-Comparative Example 3 | 1.29 mg/min | graphene |
graphene production rate-Comparative Example 4 | 1.335 mg/min | graphene |
METHOD FOR FABRICATING GRAPHENE