CN114999831A - Fiber photo-anode, preparation method thereof and application thereof in solar cell - Google Patents
Fiber photo-anode, preparation method thereof and application thereof in solar cell Download PDFInfo
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- CN114999831A CN114999831A CN202210797743.0A CN202210797743A CN114999831A CN 114999831 A CN114999831 A CN 114999831A CN 202210797743 A CN202210797743 A CN 202210797743A CN 114999831 A CN114999831 A CN 114999831A
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- 238000000034 method Methods 0.000 claims abstract description 19
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- JJWJFWRFHDYQCN-UHFFFAOYSA-J 2-(4-carboxypyridin-2-yl)pyridine-4-carboxylate;ruthenium(2+);tetrabutylazanium;dithiocyanate Chemical compound [Ru+2].[S-]C#N.[S-]C#N.CCCC[N+](CCCC)(CCCC)CCCC.CCCC[N+](CCCC)(CCCC)CCCC.OC(=O)C1=CC=NC(C=2N=CC=C(C=2)C([O-])=O)=C1.OC(=O)C1=CC=NC(C=2N=CC=C(C=2)C([O-])=O)=C1 JJWJFWRFHDYQCN-UHFFFAOYSA-J 0.000 claims abstract description 16
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- YSHMQTRICHYLGF-UHFFFAOYSA-N 4-tert-butylpyridine Chemical compound CC(C)(C)C1=CC=NC=C1 YSHMQTRICHYLGF-UHFFFAOYSA-N 0.000 claims description 8
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- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 claims description 3
- ZTOMUSMDRMJOTH-UHFFFAOYSA-N glutaronitrile Chemical compound N#CCCCC#N ZTOMUSMDRMJOTH-UHFFFAOYSA-N 0.000 claims description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 claims description 3
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- 229910052782 aluminium Inorganic materials 0.000 description 2
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- YAYGSLOSTXKUBW-UHFFFAOYSA-N ruthenium(2+) Chemical compound [Ru+2] YAYGSLOSTXKUBW-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/0029—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2022—Light-sensitive devices characterized by he counter electrode
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention relates to a fiber photo-anode, a preparation method thereof and application thereof in a solar cell. The preparation process of the fiber photo-anode comprises the following steps: the preparation method comprises the steps of taking a metal wire as a substrate, uniformly coating titanium dioxide nanoparticle slurry on the surface of the metal wire, drying to obtain a high-quality titanium dioxide nanoparticle film, and soaking the metal wire loaded with the titanium dioxide nanoparticle film into a sufficient N719 dye solution to prepare the fiber photoanode. And winding the carbon nanotube fiber serving as a counter electrode on a fiber photo-anode, placing the counter electrode in a flexible transparent plastic tube, injecting electrolyte, and sealing the tube opening with hot melt adhesive. The invention solves the problems of small dye adsorption amount, poor mechanical property and incapability of continuous preparation of the photoanode in the traditional fiber dye-sensitized solar cell. The high-performance fiber dye-sensitized solar cell prepared by the method can greatly promote the large-scale preparation and industrialization process of the fiber solar cell.
Description
Technical Field
The invention belongs to the technical field of photovoltaics, and particularly relates to a fiber photo-anode, a preparation method thereof and application thereof in a solar cell.
Background
The vigorous development of flexible electronic devices drives the development of fiber batteries as energy supply modules, and the fiber-shaped solar batteries can convert solar energy into electric energy through high efficiency, so that the continuous endurance of wearable electronic equipment is realized, and the fiber-shaped solar batteries are widely researched. Fiber Dye Sensitized Solar Cells (FDSSC) are favored by people due to simple preparation process and high photoelectric conversion efficiency. At present, a titanium dioxide nanotube array (J.Mater. chem.A,2019,7, 14447-.
Therefore, the development of high-performance fiber photo-anode materials is urgently needed, the optical performance and the mechanical performance of the high-performance fiber photo-anode materials are further improved, the continuous preparation is realized, and the large-scale preparation and industrialization process of the high-efficiency fiber dye-sensitized solar cell can be effectively promoted.
Disclosure of Invention
Based on the problems that the specific surface area of a fiber photo-anode in a fiber dye-sensitized solar cell is small, the dye adsorption capacity is limited, the mechanical property is poor, the large-scale preparation cannot be realized and the like, the invention provides the fiber photo-anode, a preparation method thereof and application thereof in the solar cell.
The fiber photo-anode provided by the invention has the advantages of large specific surface area, high dye adsorption amount and good mechanical property, and can realize continuous preparation so as to obtain high energy conversion efficiency and promote the scale preparation and industrialization process of the fiber dye-sensitized solar cell.
The purpose of the invention can be realized by the following technical scheme:
the invention firstly provides a preparation method of a fiber photo-anode, which comprises the following steps:
step (1): adding titanium dioxide nano-particles, a binder and other auxiliary agents into a solvent, and dispersing to obtain uniformly dispersed titanium dioxide nano-particle slurry;
step (2): coating titanium dioxide nanoparticle slurry on the surface of a metal wire by using the metal wire as a fiber electrode substrate through an online continuous coating process, heating and drying to form a flat, smooth and compact titanium dioxide nanoparticle film, and obtaining a metal electrode with the titanium dioxide nanoparticle film on the surface;
and (3): and (2) annealing the metal electrode with the titanium dioxide nano-particle film on the surface at high temperature, and then soaking the metal electrode in N719 (di-tetrabutylammonium-bis (isothiocyanato) -bis (2,2 '-bipyridyl-4, 4' -dicarboxyl) ruthenium (II)) dye solution to enable the titanium dioxide film to fully adsorb N719 dye molecules, thereby obtaining the fiber photoanode.
In one embodiment of the present invention, in the step (1), the solid content of the slurry of titanium dioxide nanoparticles is 5% to 60%.
In one embodiment of the present invention, in the step (1), the size of the titanium dioxide nanoparticle is 5nm to 800 nm.
In one embodiment of the present invention, in the step (1), the solvent is one of water, ethanol, and a water/ethanol mixed solvent.
In one embodiment of the present invention, in the step (1), the binder is selected from one of styrene-butadiene latex, carboxymethyl cellulose, or polyvinyl pyrrolidone.
In one embodiment of the invention, in step (1), the other auxiliary agent is selected from one or more of a film forming auxiliary agent, a wetting agent or a defoaming agent.
In one embodiment of the present invention, the dispersion in step (1) is implemented by: ball milling dispersion is carried out by a physical mode.
In one embodiment of the present invention, in the step (1), the rotation speed of the ball milling dispersion is 300rpm to 600rpm, and the time is 15min to 180 min.
In one embodiment of the present invention, in the step (2), the metal wire is selected from a pure metal wire, an alloy wire, a metal-plated fiber or a metal lapped wire, and the diameter of the metal wire is 0.1mm to 1 mm.
In one embodiment of the present invention, in the step (2), the pure metal is selected from gold, silver, platinum, copper, titanium, aluminum, etc., and the alloy is selected from stainless steel, etc.
In one embodiment of the present invention, in the step (2), the continuous coating process flow includes steps of unreeling, sizing, drying, and reeling. The coating mode is selected from one of vertical coating, horizontal coating and rolling coating.
In one embodiment of the present invention, in the step (2), the thickness of the titanium dioxide nanoparticle thin film is 2 μm to 50 μm.
In one embodiment of the present invention, in the step (3), the high temperature annealing process is: firstly, the temperature is increased from the room temperature to 450-550 ℃, the heating rate is 3-16 ℃/min, and then the constant temperature is kept for 0.5-5 h.
In one embodiment of the invention, in the step (3), the solvent in the N719 dye solution is a mixture of acetonitrile and tert-butyl alcohol, wherein the volume fraction of acetonitrile is 30% -70%, and the concentration of the N719 dye is 0.1 mM-0.5 Mm.
In one embodiment of the invention, in the step (3), the metal electrode after the high-temperature annealing treatment is soaked in the N719 dye solution for 12-72 hours.
The invention also provides the fiber photo-anode obtained based on the preparation method.
The invention further provides application of the fiber photo-anode obtained based on the preparation method in a solar cell.
Specifically, the fiber photoanode is applied to a fiber dye-sensitized solar cell, and the application route is as follows: the carbon nanotube fiber is used as a counter electrode and wound on the surface of the fiber photo-anode, then the two fiber electrodes are placed in a packaging tube, a set length is reserved outside the packaging tube for switching the electrodes, electrolyte is injected into the packaging tube, and the tube opening is sealed by hot melt adhesive.
In one embodiment of the present invention, when the fiber photoanode is applied to a fiber dye-sensitized solar cell, the outer diameter of the carbon nanotube is 5nm to 30nm, the fiber diameter of the carbon nanotube is 20 μm to 500 μm, and the winding pitch of the carbon nanotube fiber is 2mm to 30 mm.
In one embodiment of the present invention, when the fiber photoanode is applied to a fiber dye-sensitized solar cell, the electrolyte includes a solvent, iodine, lithium iodide, 1, 2-dimethyl-3-propyl imidazolium iodide, and 4-tert-butylpyridine, wherein the concentration of the iodine is 0.02M to 0.2M, the concentration of lithium iodide is 0.02M to 1M, the concentration of 1, 2-dimethyl-3-propyl imidazolium iodide is 0.1M to 1M, and the concentration of 4-tert-butylpyridine is 0.2M to 1.5M. The solvent is one or a mixture of acetonitrile, propionitrile, butyronitrile, valeronitrile, glutaronitrile and 3-methoxypropionitrile. The electrolyte provided by the invention is represented by I - /I 3 - As an electrolyte for a redox couple.
In one embodiment of the present invention, when the fiber photo-anode is applied to a fiber dye-sensitized solar cell, the inner diameter of the sealing tube is 0.4mm to 2mm, and the thickness of the tube is 0.2mm to 1 mm.
In one embodiment of the invention, when the fiber photoanode is applied in a fiber dye-sensitized solar cell, the encapsulation tube is a flexible transparent plastic tube.
In one embodiment of the present invention, the flexible transparent plastic tube material is one of polyethylene or a copolymer of ethylene and other monomers, polytetrafluoroethylene, fluorinated ethylene propylene copolymer, and polycarbonate.
The invention also provides a fiber dye-sensitized solar cell obtained based on the method.
Compared with the prior art, the invention has the beneficial effects that:
(1) compared with the traditional nanotube structure, the titanium dioxide nanoparticle film loaded uniformly on the metal wire is used as the fiber photo-anode, the surface area is larger, the amount of adsorbed dye is more, more photo-generated electrons can be generated, and the device performance is favorably improved. The invention solves the problems of small dye adsorption amount, poor mechanical property and incapability of continuous preparation of the photoanode in the traditional fiber dye-sensitized solar cell.
(2) The invention realizes the continuous preparation of the fiber photo-anode material by a solution coating process. The high-performance fiber dye-sensitized solar cell prepared by the method can greatly promote the large-scale preparation and industrialization process of the fiber solar cell.
Drawings
In fig. 1, fig. (a) is a schematic structural diagram of a fiber dye-sensitized solar cell provided by the present invention, fig. (b) is a schematic structural diagram of a fiber photo-anode, and fig. (c-e) are schematic diagrams of vertical, horizontal, and rolling coating processes, respectively.
In fig. 2, (a) is a photograph of a fiber photoanode continuously prepared based on a coating process in inventive example 1 after being rolled up, and the length is several hundreds of meters, and (b-f) are Scanning Electron Microscope (SEM) photographs of the fiber photoanode continuously prepared based on a coating process in inventive example 1.
Fig. 3 is an overall view of the fiber dye-sensitized solar cell prepared in example 1 of the present invention.
Fig. 4 is a Scanning Electron Microscope (SEM) picture of a fiber photo-anode continuously prepared based on a coating process according to example 2 of the present invention.
Fig. 5 is a current density-voltage relationship curve of the fiber dye-sensitized solar cell prepared in example 1 of the present invention.
Fig. 6 is a current density-voltage relationship curve of the fiber dye-sensitized solar cell prepared in example 2 of the present invention.
In fig. 1, the reference numerals indicate: 1: a metal wire; 2: a titanium dioxide nanoparticle film; 3: carbon nanotube fibers; 4: an electrolyte; 5: packaging the tube; 6: a slurry of titanium dioxide nanoparticles.
Detailed Description
Referring to fig. 1, the present invention provides a method for preparing a fiber photo-anode, comprising the following steps:
step (1): adding titanium dioxide nano particles, a binder and other auxiliary agents into a solvent, and dispersing to obtain uniformly dispersed titanium dioxide nano particle slurry 6;
step (2): coating titanium dioxide nanoparticle slurry on the surface of a metal wire by using the metal wire 1 as a fiber electrode substrate through an online continuous coating process, heating and drying to form a flat, smooth and compact titanium dioxide nanoparticle film, and obtaining a metal electrode with a titanium dioxide nanoparticle film 2 on the surface;
and (3): and (3) carrying out high-temperature annealing treatment on the metal electrode with the titanium dioxide nanoparticle film on the surface, and then soaking the metal electrode in N719 dye solution to enable the titanium dioxide film to fully adsorb N719 dye molecules, thus obtaining the fiber photo-anode.
In one embodiment of the present invention, in the step (1), the solid content of the slurry of titanium dioxide nanoparticles is 5% to 60%. The size of the titanium dioxide nano particles is 5 nm-800 nm. The solvent is one of water, ethanol and water/ethanol mixed solvent. The binder is selected from one of styrene-butadiene latex, carboxymethyl cellulose or polyvinylpyrrolidone. The other auxiliary agents are selected from one or more of film forming auxiliary agents, wetting agents or defoaming agents.
In one embodiment of the present invention, the dispersion in step (1) is implemented by: ball milling dispersion is carried out by a physical mode. The rotating speed of ball milling dispersion is 300-600 rpm, and the time is 15-180 min.
In one embodiment of the present invention, in the step (2), the metal wire is selected from a pure metal wire, an alloy wire, a metal-coated fiber or a metal lapped wire, and the diameter of the metal wire is 0.1mm to 1 mm. The pure metal is selected from gold, silver, platinum, copper, titanium, aluminum and the like, and the alloy is selected from stainless steel and the like. In the step (2), the continuous coating process flow comprises the steps of unreeling, sizing, drying and reeling. The coating mode is selected from one of vertical coating, horizontal coating and rolling coating. In the step (2), the thickness of the titanium dioxide nano-particle film is 2-50 μm.
In one embodiment of the present invention, in the step (3), the high temperature annealing process is: firstly, the temperature is raised from room temperature to 450-550 ℃, the heating rate is 3-16 ℃/min, and then the constant temperature is kept for 0.5-5 h. In the step (3), the solvent in the N719 dye solution is a mixture of acetonitrile and tert-butyl alcohol, wherein the volume fraction of the acetonitrile is 30% -70%, and the concentration of the N719 dye is 0.1 mM-0.5 Mm. In the step (3), the metal electrode after high-temperature annealing treatment is soaked in the N719 dye solution for 12-72 hours.
The invention further provides application of the fiber photo-anode obtained based on the preparation method in a solar cell. Specifically, the fiber photoanode is applied to a fiber dye-sensitized solar cell, and the application route is as follows: the carbon nanotube fiber 3 is used as a counter electrode and is wound on the surface of the fiber photo-anode, then the two fiber electrodes are placed in the packaging tube 5, a set length is reserved outside the packaging tube for switching the electrodes, the electrolyte 4 is injected into the packaging tube, and the tube opening is sealed by hot melt adhesive.
In one embodiment of the present invention, when the fiber photoanode is applied to a fiber dye-sensitized solar cell, the outer diameter of the carbon nanotube is 5nm to 30nm, the fiber diameter of the carbon nanotube is 20 μm to 500 μm, and the winding pitch of the carbon nanotube fiber is 2mm to 30 mm.
In one embodiment of the present invention, when the fiber photoanode is applied to a fiber dye-sensitized solar cell, the electrolyte includes a solvent, iodine, lithium iodide, 1, 2-dimethyl-3-propyl imidazolium iodide, and 4-tert-butylpyridine, wherein the concentration of the iodine is 0.02M to 0.2M, the concentration of lithium iodide is 0.02M to 1M, the concentration of 1, 2-dimethyl-3-propyl imidazolium iodide is 0.1M to 1M, and the concentration of 4-tert-butylpyridine is 0.2M to 1.5M. The solvent is one or a mixture of acetonitrile, propionitrile, butyronitrile, valeronitrile, glutaronitrile and 3-methoxypropionitrile.
In one embodiment of the present invention, when the fiber photo-anode is applied to a fiber dye-sensitized solar cell, the inner diameter of the sealing tube is 0.4mm to 2mm, and the thickness of the tube is 0.2mm to 1 mm. The packaging tube is a flexible transparent plastic tube. The flexible transparent plastic pipe material is one of polyethylene or a copolymer of ethylene and other monomers, polytetrafluoroethylene, fluorinated ethylene propylene copolymer and polycarbonate.
The invention is described in detail below with reference to the figures and specific embodiments.
Experimental procedures without group name specific conditions in the following examples were selected according to conventional procedures and conditions, or according to commercial instructions.
In the present invention, the room temperature is 10 to 30 ℃ which is the ambient temperature.
The reagents used in the following examples are commercially available reagents, and various solvents, dyes, electrolytes, etc. are commercially available from national chemical group, ltd. The various devices used in the following examples are commercially available.
Example 1
Referring to fig. 1, the preparation steps of the fiber dye-sensitized solar cell provided in this embodiment are as follows:
(1) adding 6g of titanium dioxide nanoparticles with the size of 20nm, 0.3g of carboxymethyl cellulose, 0.5g of styrene-butadiene latex and 0.2g of film-forming aid (alcohol ester twelve) into 33g of water, wherein the solid content is 15%, and performing ball milling dispersion at the rotating speed of 300rpm for 180min to obtain uniform titanium dioxide nanoparticle dispersion slurry.
(2) Through a horizontal coating process, a titanium wire with the diameter of 0.2mm is unreeled, sized, dried and coiled at the speed of 1m/min and the drying temperature of 60 ℃, and a smooth and compact titanium dioxide nano-particle film with the thickness of 10 mu m is continuously prepared on the surface of the metal wire.
(3) Carrying out high-temperature annealing treatment on the metal wire with the titanium dioxide nanoparticle film on the surface: firstly, the temperature is increased from room temperature to 550 ℃, the temperature increasing rate is 3 ℃/min, and then the constant temperature is kept for 1 h. And soaking in N719 dye solution with a mixture of acetonitrile and tert-butyl alcohol as a solvent, wherein the volume fraction of acetonitrile is 30%, the concentration of N719 is 0.1mM, the soaking time is 24h, and the preparation of the fiber photo-anode is finished.
(4) And taking out the photo-anode fiber soaked in the dye solution, and winding the carbon nanotube fiber on the photo-anode fiber with a winding pitch of 20 mm. The electrode is placed in a flexible transparent ethylene-vinyl acetate copolymer (EVA) plastic tube with the inner diameter of 0.6mm and the tube wall thickness of 0.2mm, and the two electrodes are left with proper lengths outside the tube. And injecting an electrolyte, wherein the solvent of the electrolyte is acetonitrile, the concentration of iodine is 0.02M, the concentration of lithium iodide is 0.1M, the concentration of 1, 2-dimethyl-3-propyl imidazolium iodide is 0.6M, and the concentration of 4-tert-butylpyridine is 1M. And (5) plugging the pipe orifice by using hot melt adhesive, and finishing the manufacture of the device.
The fiber photo-anode prepared in this example is shown in fig. 2, and fig. 2a is a photograph taken up, and the length of the prepared photo-anode is hundreds of meters. The microscopic morphology of the fiber photo-anode is shown in fig. 2b-f, the titanium dioxide nano-particle film is flat, smooth, flat and compact, and the quality of the surface fiber photo-anode film is very good.
The microstructure of the prepared fiber solar cell is shown in fig. 3, and the carbon nanotube fiber is wound on the surface of the photo-anode and is tightly attached. FIG. 5 is a graph showing the relationship between current density and voltage of the fiber dye-sensitized solar cell prepared in this example under the standard sunlight of AM 1.5, wherein the open-circuit voltage is 0.761V, and the short-circuit current is 15.056mA/cm 2 The fill factor of 0.735, the energy conversion efficiency of 8.426%, exhibited excellent device performance.
Example 2
Referring to fig. 1, the preparation steps of the fiber dye-sensitized solar cell are as follows:
(1) 14g of titanium dioxide nano-particles with the size of 60nm, 0.2g of polyvinylpyrrolidone, 1g of styrene-butadiene latex and 0.3g of film-forming aid (alcohol ester twelve) are added into 23g of water, the solid content is 40 percent, ball milling dispersion is carried out, the rotating speed is 600rpm, and the time is 60min, so that uniform titanium dioxide nano-particle dispersion slurry is obtained.
(2) Through a horizontal coating process, a titanium wire with the diameter of 0.15mm is unreeled, sized, dried and reeled at the speed of 6m/min and the drying temperature of 120 ℃, and a smooth and compact titanium dioxide nanoparticle film with the thickness of 25 mu m is continuously prepared on the surface of the metal wire.
(3) And (3) carrying out high-temperature annealing treatment on the metal wire with the titanium dioxide nanoparticle film on the surface, heating the metal wire from room temperature to 450 ℃, wherein the heating rate is 10 ℃/min, and then keeping the constant temperature for 4 h. Then soaking in N719 dye solution, wherein a mixture of acetonitrile and tert-butyl alcohol is used as a solvent, the volume fraction of acetonitrile is 70%, the concentration of N719 is 0.2mM, and the soaking time is 24 h. The fiber photo-anode is prepared.
(4) And taking out the photo-anode fiber soaked in the dye solution, and winding the carbon nano tube fiber on the photo-anode fiber with a winding pitch of 30 mm. The membrane is placed in a flexible transparent fluorinated ethylene propylene copolymer plastic tube with the inner diameter of 1.6mm and the tube wall thickness of 0.2mm, the two electrodes are arranged outside the tube in a proper length, electrolyte is injected, the solvent of the electrolyte is acetonitrile, the concentration of iodine is 0.1M, the concentration of lithium iodide is 0.2M, the concentration of 1, 2-dimethyl-3-propyl imidazolium iodide is 0.4M, and the concentration of 4-tert-butylpyridine is 1.5M. And (5) plugging the pipe orifice by using hot melt adhesive, and finishing the manufacture of the device.
The microscopic morphology of the fiber photo-anode prepared by the embodiment is shown in fig. 4, the titanium dioxide nanoparticle film is flat, smooth, flat and compact, and the quality of the surface fiber photo-anode film is very good.
FIG. 6 is a graph showing the relationship between current density and voltage of the fiber dye-sensitized solar cell prepared in this example under the standard sunlight of AM 1.5, wherein the open-circuit voltage is 0.759V, and the short-circuit current is 15.413mA/cm 2 The fill factor of 0.728 and the energy conversion efficiency of 8.515% exhibited excellent device performance.
The embodiments described above are intended to facilitate a person of ordinary skill in the art in understanding and using the invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A preparation method of a fiber photo-anode is characterized by comprising the following steps:
step (1): adding titanium dioxide nano-particles, a binder and other auxiliary agents into a solvent, and dispersing to obtain uniformly dispersed titanium dioxide nano-particle slurry;
step (2): coating titanium dioxide nanoparticle slurry on the surface of a metal wire by using the metal wire as a fiber electrode substrate through an online continuous coating process, heating and drying to form a flat, smooth and compact titanium dioxide nanoparticle film, and obtaining a metal electrode with the titanium dioxide nanoparticle film on the surface;
and (3): and (3) carrying out high-temperature annealing treatment on the metal electrode with the titanium dioxide nanoparticle film on the surface, and then soaking the metal electrode in N719 dye solution to enable the titanium dioxide film to adsorb N719 dye molecules, thus obtaining the fiber photo-anode.
2. The method for preparing a fiber photoanode according to claim 1, wherein in the step (1), the solid content of the titanium dioxide nanoparticle slurry is 5% to 60%;
in the step (1), the size of the titanium dioxide nano particles is 5 nm-800 nm.
3. The method according to claim 1, wherein in step (1), the solvent is one of water, ethanol and a water/ethanol mixed solvent in step (1);
in the step (1), the binder is selected from one of styrene-butadiene latex, carboxymethyl cellulose or polyvinylpyrrolidone;
in the step (1), the other auxiliary agent is one or more selected from a film forming auxiliary agent, a wetting agent or a defoaming agent.
4. The method for preparing a fiber photoanode according to claim 1, wherein in the step (1) and in the step (2), the metal wire is selected from a pure metal wire, an alloy wire, a metal-plated fiber or a metal lapped wire, and the diameter of the metal wire is 0.1mm to 1 mm;
in the step (2), the thickness of the titanium dioxide nano-particle film is 2-50 μm.
5. The method for preparing a fiber photoanode according to claim 1, wherein in the step (1) and in the step (3), the high temperature annealing process comprises: firstly, the temperature is increased from the room temperature to 450-550 ℃, the heating rate is 3-16 ℃/min, and then the constant temperature is kept for 0.5-5 h.
6. The method for preparing a fiber photoanode according to claim 1, wherein in the step (1) and in the step (3), the solvent in the N719 dye solution is a mixture of acetonitrile and tert-butyl alcohol, wherein the volume fraction of acetonitrile is 30% to 70%, and the concentration of the N719 dye is 0.1mM to 0.5 Mm.
7. A fiber photoanode obtained by the method according to any one of claims 1 to 6.
8. Use of the fiber photoanode of claim 7 in a solar cell, wherein the following routes are used:
and (2) taking carbon nanotube fibers as a counter electrode, winding the carbon nanotube fibers on the surface of a fiber photo-anode, then placing two fiber electrodes in a packaging tube, reserving a set length of the two electrodes outside the packaging tube for switching the electrodes, injecting electrolyte into the packaging tube, and sealing the tube opening by using hot melt adhesive to obtain the fiber dye-sensitized solar cell.
9. The use of the fiber photoanode in a solar cell according to claim 8, wherein the outer diameter of the carbon nanotube is 5nm to 30nm, the diameter of the carbon nanotube fiber is 20 μm to 500 μm, and the winding pitch of the carbon nanotube fiber is 2mm to 30 mm;
the electrolyte comprises a solvent, iodine, lithium iodide, 1, 2-dimethyl-3-propyl imidazolium iodide and 4-tert-butylpyridine, wherein the concentration of elemental iodine is 0.02-0.2M, the concentration of lithium iodide is 0.02-1M, the concentration of 1, 2-dimethyl-3-propyl imidazolium iodide is 0.1-1M, and the concentration of 4-tert-butylpyridine is 0.2-1.5M; the solvent is one or a mixture of acetonitrile, propionitrile, butyronitrile, valeronitrile, glutaronitrile and 3-methoxypropionitrile.
10. A fiber dye-sensitized solar cell, characterized by being prepared based on the application method of claim 8 or 9.
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