CN212450647U - Device for producing graphene by electrochemically stripping graphite from electrode array - Google Patents
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Abstract
The utility model discloses a device of graphite production graphite alkene is peeled off to electrode array electrochemistry, the device includes the electrolysis trough, be full of electrolyte in the electrolysis trough, be equipped with a set of first conductive bus and the conductive bus of second opposite polarity with the power intercommunication in the electrolysis trough, the order interval has hung graphite electrode device and counter electrode device on every first conductive bus and the conductive bus of second in proper order, be equipped with the electrolyte export on the electrolysis trough, get into the buffer pool behind the first pipe that the electrolyte export was through being equipped with first ooff valve and the pump intercommunication, still be equipped with a set of electrolyte feed inlet on the electrolysis trough, every electrolyte feed inlet is through the second pipe and the buffer pool intercommunication that are equipped with the second ooff valve. The device has the advantages of low cost, safety, high efficiency, simple operation and continuous production.
Description
Technical Field
The utility model relates to a technique of graphite alkene is produced to electrochemistry rule modularization specifically is a device of graphite production graphite alkene is peeled off to electrode array electrochemistry.
Background
Graphene is a two-dimensional honeycomb crystal with a perfect monoatomic layer, has excellent optical, mechanical and electronic properties due to a unique physical structure, has potential application prospects in the fields of optics, electronics, biomedicine, energy storage, sensors and the like, is widely concerned by the scientific community and governments of various countries, and enables basic science and application technologies related to the graphene field to be rapidly developed in more than ten years. But the industrial production and application of the graphene are still slow at present, and how to produce high-quality graphene in a green, low-cost and large-scale mode is a key problem which restricts the development of the field of graphene.
The method mainly comprises a mechanical stripping method, a SiC epitaxial growth method, a chemical vapor deposition method, an oxidation-reduction method, a solvothermal method, an electrochemical stripping method and the like, compared with other methods, the electrochemical stripping method has the advantages of low cost, rapidness, high efficiency, environmental friendliness and the like, and is widely concerned and favored by academia and industry in recent years. (1) The graphite is used as a raw material, so that the price is low and the reserves are rich; (2) the reaction condition is mild, the operation is simple, and the production cost is low; (3) strong oxidant and reducing agent are not needed in the production process, so that the method has the advantages of environmental protection and capability of reducing the defects of graphene; (4) key process parameters such as voltage, current and the like in the electrochemical stripping process can be accurately regulated and controlled, and controllable production and performance regulation and control of graphene can be realized; (5) in the electrochemical stripping graphite reaction process, when the anode obtains graphene, the cathode synchronously electrolyzes water to produce clean energy hydrogen, and the method has the advantage of co-producing graphene and hydrogen in the same process.
However, at present, the electrochemical exfoliation method is still in a basic research stage of a laboratory, the production mode is mainly single graphite electrode device exfoliation, although a beaker-level electrochemical exfoliation method can obtain a high-quality graphene product, the exfoliation efficiency and the production scale are small, and the requirements of industrial-level large-scale production cannot be met, so that the development of a high-efficiency large-scale production method for preparing graphene by electrochemically exfoliating graphite and a corresponding device are urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a device that graphite production graphite is peeled off to electrode array electrochemistry, which is not enough for the prior art. The device has the advantages of low cost, safety, high efficiency, simple operation and continuous production.
Realize the utility model discloses the technical scheme of purpose is:
a device for producing graphene by electrochemically stripping graphite from an electrode array comprises an electrolytic bath, wherein the electrolytic bath is filled with electrolyte, a group of first conductive buses and second conductive buses which are communicated with a direct-current power supply and have opposite polarities are arranged in the electrolytic bath, the first conductive buses and the second conductive buses provide electrochemical stripping current, a graphite electrode device and a counter electrode device are sequentially hung on each first conductive bus and each second conductive bus at intervals, a first conductive tab on the graphite electrode device and a second conductive tab on the counter electrode device are hung on the first conductive buses, a first conductive tab on the graphite electrode device and a second conductive tab on the counter electrode device are hung on the second conductive buses, an electrolyte outlet is arranged on the electrolytic bath, the electrolyte outlet is communicated with a pump through a first conduit provided with a first switch valve and then enters a buffer pool, the electrolytic cell is also provided with a group of electrolyte feed inlets, and each electrolyte feed inlet is communicated with the buffer tank through a second guide pipe provided with a second switch valve.
The graphite electrode device comprises graphite and a conductive clamp, the conductive clamp is provided with a first metal clamping piece and a second metal clamping piece, the edge of the graphite is clamped between the first metal clamping piece and the second metal clamping piece, the connection mode is metal-graphite-metal, the contact surface is fixed by a fastener, wherein the first metal clamping piece extends outwards from one side covering the edge part of the graphite to form a strip-shaped first conductive tab, the first conductive tab is clamped by a first insulation plate, the shape of the mirror symmetry part of the first insulation plate and the first conductive tab is consistent with the shape of the symmetry part of the first conductive tab to form the first insulation tab, the outward end parts of the first conductive tab and the first insulation tab are respectively provided with a semicircular hole with the same direction and the same radius as the diameter of a conductive bus, the semicircular hole part of the first conductive tab extends out of the first insulation plate, the graphite is externally provided with a filter bag film wrapping the graphite, the graphite electrode device is connected with the conductive bus in a suspension mode to fix the electrode device on the bus.
The counter electrode device comprises a metal counter electrode plate, the electrode plate is arranged in an insulated ion exchange membrane supporting frame, the part of the electrode plate extending out of the ion exchange membrane supporting frame forms a strip-shaped second conductive tab, the second conductive tab is clamped by a second insulating plate, the shape of the mirror symmetry part of the second insulating plate and the second conductive tab is consistent with the shape of the symmetry part of the second conductive tab, the outward end parts of the second conductive tab and the second insulating tab are provided with semicircular holes with consistent directions and the same radius as the line diameter of a conductive bus, the semicircular hole parts of the second conductive tab extend out of the second insulating plate, two parallel surfaces of the ion exchange membrane supporting frame and the working surface of the counter electrode plate are both provided with a group of separating frames, each separating frame is internally provided with an ion exchange membrane hermetically connected with the separating frames, and the ion exchange membrane is a perfluorinated sulfonic acid ion membrane, when the ion exchange membrane supporting frame is arranged in the electrolytic bath, the upward end part is provided with a group of air guide holes, the lower part of the ion exchange membrane supporting frame extending into the electrolytic bath is provided with a group of liquid guide holes, the counter electrode device is fixed on the bus in a suspension mode, and the overall dimension of the counter electrode plate is slightly larger than that of the graphite.
The graphite electrode device and the counter electrode device are respectively N and N +1 in number, the adjacent graphite electrode device and the counter electrode device form an electrolysis unit, the plurality of electrolysis units form an electrode array, the stripping mode is anode stripping or cathode stripping, the adjacent graphite electrode device and the counter electrode device form an electrolysis unit, the number of graphite anode electrodes is N when the anode is stripped, the number of cathode electrodes is N +1 when the cathode is stripped, the number of graphite cathode electrodes is N when the cathode is stripped, and the number of anode electrodes is N + 1.
The number of the first conductive buses and the number of the second conductive buses are at least 1, the same electrode array can use the independent first conductive buses and the independent second conductive buses, the number of the conductive buses in the single-stage electrolytic cell is even, different electrode arrays can share one conductive bus with the adjacent electrode arrays, and the number of the conductive buses in the single-stage electrolytic cell is odd.
The first conductive bus and the second conductive bus are respectively provided with a first fixing block and a second fixing block which are used for fixing the graphite electrode device and the counter electrode device, and the first fixing block and the second fixing block are respectively slidable on the first conductive bus and the second conductive bus, namely, the distance between the graphite electrode device and the counter electrode device can be adjusted through the first fixing block and the second fixing block.
The polar distance between the graphite electrode device and the counter electrode device is 1-10 cm.
The graphite material is one of graphite foil, highly oriented pyrolytic graphite, natural crystalline flake graphite, graphite powder, activated carbon, coal coke, petroleum coke and biochar.
The electrode plate is one of a titanium plate, stainless steel, a nickel plate, a platinum sheet and graphite.
N graphite electrode devices and N +1 counter electrode device arrays in an electrolytic cell 1 are connected in parallel to form 2N electrolytic units, adjacent positive and negative electrodes form one electrolytic unit, the graphite electrode devices are synchronously stripped by two adjacent counter electrode devices in one graphite electrode device, a bus of the electrolytic cell is connected with a power supply, and OH is firstly generated in electrolyte-Free radicals, then OH-Attack graphite edge by free radicalsOpening the crystal boundary, and enabling ion intercalation in the electrolyte to enter the graphite interlayer to cause graphite expansion, so that the acting force between the graphite flake interlayers is weakened, and the interlayer spacing of the graphite is increased; production of O with reaction of water molecules between layers2Thereby further exfoliating the graphite into graphene.
The device for producing the graphene by electrochemically stripping the graphite by using the electrode array comprises the following steps:
1) assembling the device: the assembly of the graphite electrode device, the counter electrode device and the electrolytic cell is completed;
2) preparing an electrolyte: weighing 100-500g of salt substance, dissolving 38L of the salt substance in deionized water or NMP to prepare electrolyte, and promoting the flow of the electrolyte by using external circulation to realize constant concentration control of the electrolyte, wherein the salt substance is one of water-based electrolyte, organic electrolyte and solute in ionic liquid;
3) electric stripping: injecting the electrolyte prepared in the step 2) into an electrolytic cell, connecting a first conductive bus and a second conductive bus in the electrolytic cell with a direct current power supply, setting the power supply output to be 1V-60V, electrically stripping for 1-8h, repeatedly washing a product after stripping is finished, then re-dispersing in DMF, and carrying out ultrasonic treatment for 2 hours to obtain a graphene dispersion liquid;
4) obtaining graphene powder: centrifuging 3000rmp of the graphene dispersion liquid to obtain an upper layer liquid, washing away residual DMF, ultrasonically dispersing a graphene precipitate in deionized water, and freeze-drying overnight to obtain graphene powder.
The technical scheme has the following advantages: the graphite electrode device-counter electrode device array synchronous stripping method in the single-stage electrolytic tank can realize free replacement of the graphite electrode device in the production process and keep the stripping current of other electrolytic units unchanged, thereby realizing continuous production; the electrolytic units in the single-stage electrolytic cell are arranged at intervals, namely, the graphite electrode device and the counter electrode device are continuously arranged at intervals, and the connected electrolytic units share one counter electrode device, so that the graphite electrode devices of different electrolytic units can be simultaneously stripped from two sides, and the production efficiency is improved; the graphite electrode device and the counter electrode device in the electrolytic cell are connected through the conductive bus, and the electrolytic cell has the advantages that the polar distance of the positive electrode and the negative electrode can be flexibly adjusted, the graphite electrode device can be conveniently replaced, the production scale can be flexibly adjusted, and the like; the technical scheme has no specific requirements on the shape and material of the graphite electrode device, the type and concentration of the electrolyte.
The device has the advantages of low cost, safety, high efficiency, simple and convenient operation and capability of realizing continuous production, the method has mild reaction conditions, simple operation and low production cost, strong oxidant and reducing agent are not needed in the production process, the method has the advantages of environmental protection, the voltage and current technological parameters can be accurately regulated and controlled in the electrochemical stripping process, the controllable production and performance regulation and control of graphene can be realized, and the efficiency of large-scale production of graphene is improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment;
FIG. 2 is a schematic view of a graphite electrode assembly in an embodiment
FIG. 3 is a schematic structural view of a counter electrode device in an embodiment;
FIG. 4 is a schematic view of the inner side of the electrolytic cell in the example
Fig. 5 is an XRD pattern of graphene obtained in example;
FIG. 6 is an SEM photograph of a product stripped off in example;
FIG. 7 is a TEM image of a product stripped off in example.
In the figure, 1, an electrolytic bath 2, a graphite electrode device 3, a counter electrode device 4, a first conductive bus 4-1, a second conductive bus 5, a first conductive tab 5-1, a second insulating tab 6, a first insulating tab 6-1, a second conductive tab 7, an electrolyte outlet 8, a first switch valve 9, a first conduit 10, a pump 11, a buffer tank 12, an electrolyte inlet 13, a second switch valve 14, a second conduit 15, graphite 16, a conductive clamp 17, a first metal clamping piece 18, a second metal clamping piece 19, a first insulating plate 20, a filter bag film 21, an electrode plate 22, an ion exchange film supporting frame 23, a second insulating plate 24, a separating frame 25, an ion exchange film 26, an air guide hole 27, a liquid guide hole 28, a first fixing block 28-1 and a second fixing block.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, which are not intended to limit the present invention.
Example (b):
referring to fig. 1 and 4, an apparatus for producing graphene by electrochemically stripping graphite with an electrode array comprises an electrolytic cell 1, the electrolytic cell 1 is filled with an electrolyte, a set of first conductive bus 4 and second conductive bus 4-1 with opposite polarities and communicated with a direct current power supply is arranged in the electrolytic cell 1, the first conductive bus 4 and the second conductive bus 4-1 provide electrochemical stripping current, a graphite electrode device 2 and a counter electrode device 3 are sequentially suspended on each of the first conductive bus 4 and the second conductive bus 4-1 at intervals, the graphite electrode device 2 and the counter electrode device 3 are provided, wherein a first conductive tab 5 on the graphite electrode device 2 and a second insulating tab 5-1 on the counter electrode device 3 are suspended on the first conductive bus 4, a first insulating tab 6 on the graphite electrode device 2 and a second conductive tab 6-1 on the counter electrode device 3 are suspended on the second conductive bus 4-1, the electrolytic cell 1 is provided with an electrolyte outlet 7, the electrolyte outlet 7 is communicated with a pump 10 through a first conduit 9 provided with a first switch valve 8 and then enters a buffer pool 11, the electrolytic cell 1 is further provided with a group of electrolyte feed inlets 12, and each electrolyte feed inlet 12 is communicated with the buffer pool 11 through a second conduit 14 provided with a second switch valve 13.
As shown in fig. 2, the graphite electrode assembly 2 includes graphite 15 and a conductive clamp 16, the conductive clamp 16 has a first metal clip 17 and a second metal clip 18, the edge of the graphite 15 is clamped between the first metal clip 17 and the second metal clip 18, the connection mode is metal-graphite-metal, the contact surface is fixed by a fastener, wherein the first metal clip 17 extends outwards from the side covering the edge of the graphite 15 to form a strip-shaped first conductive tab 5, the first conductive tab 5 is clamped by a first insulation plate 19, the shape of the mirror symmetry part of the first insulation plate 19 and the first conductive tab 5 is consistent with the shape of the symmetry part of the first conductive tab 5 to form a first insulation tab 6, the outward end parts of the first conductive tab 5 and the first insulation tab 6 are provided with semicircular holes with the same direction and the same radius as the diameter of the conductive bus, the semicircular hole part of the first conductive tab 5 extends out of the first insulating plate 19, a filter bag film 20 wrapping graphite is arranged outside the graphite 15, and the electrode device 2 is fixed on the bus in a suspension mode by adopting a connection mode with the conductive bus.
As shown in fig. 3, the counter electrode device 3 includes a metal counter electrode plate 21, the electrode plate 21 is disposed in an insulating ion exchange membrane support frame 22, the portion of the electrode plate 21 extending from the ion exchange membrane support frame 22 forms a strip-shaped second conductive tab 5-1, the second conductive tab 5-1 is clamped by a second insulating plate 23, the second insulating plate 23 and the second conductive tab 5-1 are in mirror symmetry, the shape of the symmetric portion of the second conductive tab 5-1 is identical to that of the second insulating tab 6-1, the outward end portions of the second conductive tab 5-1 and the second insulating tab 6-1 are provided with semicircular holes having the same radius and the same diameter of a conductive bus, the semicircular hole portion of the second conductive tab 5-1 extends out of the second insulating plate 23, two faces of the ion exchange membrane support frame 22 parallel to the working face of the counter electrode plate 21 are both provided with a set of separation frames 24, an ion exchange membrane 25 hermetically connected with the separation frame 24 is arranged in each separation frame 24, the ion exchange membrane 25 is a perfluorinated sulfonic acid ion membrane, a group of air vents 26 are arranged at the upward end part of the ion exchange membrane support frame 22 when the ion exchange membrane support frame 22 is arranged in the electrolytic cell 1, a group of liquid vents 27 are arranged at the lower part of the ion exchange membrane support frame 22, the counter electrode device 3 is fixed on a bus in a suspension mode, wherein the overall dimension of the counter electrode plate 21 is slightly larger than that of the graphite 15.
The number of the graphite electrode devices 2 and the number of the counter electrode devices 3 are respectively N and N +1, the adjacent graphite electrode devices 2 and the counter electrode devices 3 form an electrolysis unit, the plurality of electrolysis units form an electrode array, the stripping mode is anode stripping or cathode stripping, the adjacent graphite electrode devices and the counter electrode devices form an electrolysis unit, the number of the graphite anode electrodes is N when the anode is stripped, the number of the graphite cathode electrodes is N +1 when the cathode is stripped, and the number of the graphite cathode electrodes is N when the cathode is stripped, and the number of the anode electrodes is N + 1.
The number of the first conductive buses 4 and the second conductive buses 4-1 is at least 1, the same electrode array can use the independent first conductive buses 4 and the independent second conductive buses 4-1, the number of the conductive buses in the single-stage electrolytic cell 1 is even, different electrode arrays can share one conductive bus with the adjacent electrode arrays, and the number of the conductive buses in the single-stage electrolytic cell 1 is odd.
The first conductive bus 4 and the second conductive bus 4-1 are respectively provided with a first fixing block 28 and a second fixing block 28-1 for fixing the graphite electrode device 2 and the counter electrode device 3, and the first fixing block 28 and the second fixing block 28-1 are respectively slidable on the first conductive bus 4 and the second conductive bus 4-1, namely, the distance between the graphite electrode device 2 and the counter electrode device 3 can be adjusted through the first fixing block 28 and the second fixing block 28-1.
The polar distance between the graphite electrode device 2 and the counter electrode device 3 is 1-10 cm.
The graphite 15 is made of one of graphite foil, highly oriented pyrolytic graphite, natural crystalline flake graphite, graphite powder, activated carbon, coal, petroleum coke and biochar.
The electrode plate 21 is one of a titanium plate, stainless steel, a nickel plate, a platinum sheet and graphite.
N graphite electrode devices and N +1 counter electrode device arrays in an electrolytic cell 1 are connected in parallel to form 2N electrolytic units, adjacent positive and negative electrodes form one electrolytic unit, the graphite electrode devices are synchronously stripped by two adjacent counter electrode devices in one graphite electrode device, a bus of the electrolytic cell is connected with a power supply, and OH is firstly generated in electrolyte-Free radicals, then OH-The free radicals attack the edge of graphite, open its grain boundary, the ion intercalation in the electrolyte enters between the graphite layers, cause the graphite to expand, weaken the acting force between the graphite flake layers and thus increase the interlamellar spacing of graphite; production of O with reaction of water molecules between layers2Thereby further exfoliating the graphite into graphene.
The device for producing the graphene by electrochemically stripping the graphite by using the electrode array comprises the following steps:
experiment 1:
1) assembling the device: the assembly of the graphite electrode device 2, the counter electrode device 3 and the electrolytic bath 1 is completed;
2) preparing an electrolyte: weighing 500g of anhydrous sodium sulfate, and dissolving the anhydrous sodium sulfate in deionized water to prepare electrolyte;
3) electric stripping: injecting the electrolyte prepared in the step 2) into an electrolytic cell 1, connecting a first conductive bus 4 and a second conductive bus 4-1 in the electrolytic cell 1 with a direct-current power supply, setting the power supply output to be 1V-60V, electrically stripping for 1-8h, repeatedly washing a product after stripping is finished, then re-dispersing in DMF, and ultrasonically treating for 2 hours to obtain a graphene dispersion liquid;
4) obtaining graphene powder: centrifuging 3000rmp of the graphene dispersion liquid to obtain an upper layer liquid, washing away residual DMF, ultrasonically dispersing a graphene precipitate in deionized water, and freeze-drying overnight to obtain graphene powder.
Experiment 2: the same procedure as in experiment 1 was repeated except that 500g of quaternary ammonium salt was used as the salt substance in this example and dissolved in 38L of an organic solvent to prepare an electrolyte solution.
Experiment 3: the salt substance in this example was 300g of anhydrous sodium sulfate dissolved in deionized water to prepare an electrolyte, and the rest of experiment 1 was performed.
Experiment 4: the salt substance in this example was prepared by dissolving 200g of anhydrous sodium sulfate in deionized water to prepare an electrolyte, and the rest of experiment 1 was performed.
Experiment 5: the salt substance in this example was 100g of anhydrous sodium sulfate dissolved in deionized water to prepare an electrolyte, and the rest of experiment 1 was performed.
The XRD pattern of the graphene obtained in this example is shown in fig. 5, the SEM pattern of the graphene product obtained in this example is shown in fig. 6, and the TEM pattern of the graphene product obtained in this example is shown in fig. 7.
Claims (9)
1. A device for producing graphene by electrochemically stripping graphite from an electrode array is characterized by comprising an electrolytic cell, wherein the electrolytic cell is filled with electrolyte, a group of first conductive buses and second conductive buses which are communicated with a power supply and have opposite polarities are arranged in the electrolytic cell, a graphite electrode device and a counter electrode device are sequentially hung on each first conductive bus and each second conductive bus at intervals, a first conductive tab on the graphite electrode device and a second conductive tab on the counter electrode device are hung on the first conductive buses, a first insulating tab on the graphite electrode device and a second insulating tab on the counter electrode device are hung on the second conductive buses, an electrolyte outlet is arranged on the electrolytic cell, the electrolyte outlet is communicated with a pump through a first conduit provided with a first switch valve and then enters a buffer tank, and a group of electrolyte feed inlets are further arranged on the electrolytic cell, each electrolyte feeding hole is communicated with the buffer pool through a second guide pipe provided with a second switch valve.
2. The device for producing graphene by electrochemically stripping graphite from an electrode array according to claim 1, wherein the graphite electrode device comprises graphite and a conductive clamp, the conductive clamp is provided with a first metal clip and a second metal clip, the edge of the graphite is clamped between the first metal clip and the second metal clip, the connection mode is metal-graphite-metal, the contact surface is fixed by a fastener, wherein the first metal clip extends outwards from one side covering the edge part of the graphite to form a strip-shaped first conductive tab, the first conductive tab is clamped by a first insulation plate, the shape of the mirror symmetry part of the first insulation plate and the first conductive tab is consistent with the shape of the symmetry part of the first conductive tab to form the first insulation tab, the outward end parts of the first conductive tab and the first insulation tab are provided with semicircular holes with the same direction and the same radius as the diameter of a conductive bus, the semi-circular hole part of the first conductive tab extends out of the first insulating plate, a filter bag film wrapping graphite is arranged outside the graphite, and the graphite electrode device is fixed on the bus in a hanging mode in a connection mode with the conductive bus.
3. The apparatus of claim 1, wherein the counter electrode assembly comprises a metal counter electrode plate disposed in an insulating support frame of an ion exchange membrane, the electrode plate extends from the support frame of the ion exchange membrane to form a strip-shaped second conductive tab, the second conductive tab is sandwiched by a second insulating plate, the second insulating plate and the second conductive tab are mirror-symmetrical and have a same shape as the symmetrical portion of the second conductive tab to form a second insulating tab, the outward ends of the second conductive tab and the second insulating tab are provided with semicircular holes having a same direction and a same radius as the diameter of a conductive bus, the semicircular holes of the second conductive tab extend out of the second insulating plate, and a set of separation frames are disposed on two parallel surfaces of the support frame of the ion exchange membrane and the working surface of the counter electrode plate, an ion exchange membrane hermetically connected with the separation frame is arranged in each separation frame, a group of air vents are arranged at the upward end part of the ion exchange membrane support frame when the ion exchange membrane support frame is arranged in the electrolytic bath, a group of liquid vents are arranged at the lower part of the ion exchange membrane support frame, which extends into the electrolytic bath, and the counter electrode device is fixed on the bus in a suspension mode, wherein the overall dimension of the counter electrode plate is slightly larger than that of graphite.
4. The device for producing graphene by electrochemically stripping graphite from an electrode array according to claim 1, wherein the number of the graphite electrode devices and the counter electrode devices is N and N +1, respectively, the adjacent graphite electrode devices and the counter electrode devices form an electrolysis unit, a plurality of electrolysis units form the electrode array, the stripping mode is anode stripping or cathode stripping, the adjacent graphite electrode devices and the counter electrode devices form an electrolysis unit, the number of the graphite anode electrodes during anode stripping is N, the number of the cathode electrodes is N +1, the number of the graphite cathode electrodes during cathode stripping is N, and the number of the anode electrodes is N + 1.
5. The device for producing graphene by electrochemically stripping graphite from an electrode array according to claim 1, wherein the number of the first conductive bus bar and the second conductive bus bar is at least 1, the first conductive bus bar and the second conductive bus bar can be independently used for the same electrode array, the number of the conductive bus bars in a single-stage electrolytic cell is even, and one conductive bus bar is shared by a different electrode array and an adjacent electrode array, and the number of the conductive bus bars in a single-stage electrolytic cell is odd.
6. The device for producing graphene by electrochemically stripping graphite from an electrode array according to claim 1, wherein the first conductive bus and the second conductive bus are respectively provided with a first fixing block and a second fixing block for fixing the graphite electrode device and the counter electrode device, and the first fixing block and the second fixing block are respectively slidable on the first conductive bus and the second conductive bus, so that the distance between the graphite electrode device and the counter electrode device can be adjusted through the first fixing block and the second fixing block.
7. The device for producing graphene by electrochemically stripping graphite from an electrode array according to claim 1, wherein the polar distance between the graphite electrode device and the counter electrode device is 1-10 cm.
8. The device for producing graphene by electrochemically stripping graphite from an electrode array according to claim 2, wherein the graphite material is one of graphite foil, highly oriented pyrolytic graphite, natural flake graphite, graphite powder, activated carbon, coal coke, petroleum coke and biochar.
9. The device for producing graphene by electrochemically stripping graphite from an electrode array according to claim 3, wherein the electrode plate is one of corrosion-resistant conductive metal or graphite with stripping function.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111924832A (en) * | 2020-09-23 | 2020-11-13 | 广西师范大学 | Device and method for producing graphene by electrochemically stripping graphite from electrode array |
| CN114956059A (en) * | 2022-07-06 | 2022-08-30 | 广西师范大学 | Temperature control and convection homogenization device and method for preparing graphene by electrochemically stripping graphite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111924832A (en) * | 2020-09-23 | 2020-11-13 | 广西师范大学 | Device and method for producing graphene by electrochemically stripping graphite from electrode array |
| CN114956059A (en) * | 2022-07-06 | 2022-08-30 | 广西师范大学 | Temperature control and convection homogenization device and method for preparing graphene by electrochemically stripping graphite |
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