Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
It will be appreciated that terms such as "upper," "above," "lower," "below," and the like, as used herein, refer to spatially relative positions and are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The term spatially relative position may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
As shown in fig. 1-4, the present invention discloses a supported micro-tube solid oxide fuel cell.
Fig. 1 is a cross-sectional view of a supported micro-pipe solid oxide fuel cell in a first embodiment of the present invention, the supported micro-pipe solid oxide fuel cell 10 including: the support microtube 11 comprises a first support surface 111 and a second support surface 112 arranged opposite each other. An anode layer 12 is disposed on the first support surface 111 of the support microtubes. An electrolyte layer 13 is provided on the anode layer 12. A cathode layer 14 disposed on the electrolyte layer 13. Thus, the above structure forms a microtube type solid oxide fuel cell structure of the support microtube 11/anode layer 12/electrolyte layer 13/cathode layer 14.
As shown in fig. 1, the support microtubes are provided with hollow portions 113 penetrating both ends in the longitudinal direction, and the hollow portions 113 are used for passing fuel gas. It will be appreciated that, as shown in fig. 2, the support microtubes have a through-hole structure at both ends, and the fuel gas 16 flows through the hollow portion 113 in the X1 direction.
Specifically, the diameter A5 of the support microtube type solid oxide fuel cell may be 0.5mm to 10mm, and the length A1 may be 20mm to 300mm.
Fig. 2 is a plan view of a supported microtube type solid oxide fuel cell according to a first embodiment of the present invention, and it can be seen that the anode layer 12, the electrolyte layer 13 and the cathode layer 14 do not cover the entire length of the support microtube 11. Specifically, the length of the support microtube 11 is defined as A1, the length of the cathode layer 14 is defined as A2, and the length of the portion of the first support surface 111 of the support microtube 11 not covered by the anode layer 12 and the electrolyte layer 13 is defined as A4. The anode layer 12 is not shown in fig. 2, since the electrolyte layer 13 is coated on top of the anode layer 12. The length A2 of the cathode layer 14 is smaller than the length of the electrolyte layer 13, so that the surface of the electrolyte layer 13 has a portion not covered by the cathode layer 14, the length of which is defined as A3, and an insulating airtight layer 15 is provided on this portion. Similarly, the exposed portion of the electrolyte layer 13 is covered with the insulating airtight layer 15, and thus the electrolyte layer 13 is also not shown in fig. 2. The provision of the insulating inner liner 15 allows the first support surface 111 and the cathode layer 14 to be in an insulating state while also providing a gas barrier for the electrolyte layer 13 so that the gases between the anode layer 12 and the cathode layer 14 do not leak from each other.
Preferably, the insulating inner liner 15 may be formed by uniformly brushing a glass medium paste on the surface of the electrolyte layer 13 and sintering at a high temperature.
Specifically, the length A3 of the insulating inner liner 15 may be 0.1% to 5% of the length A1 of the support microtube 11. The length A2 of the cathode layer 14 may be greater than half the length A2 of the support microtubes 11, that is: the length A4 of the support microtubes 11 not covered by the cathode layer 14 is smaller than the length A2 of the cathode layer 14. The thickness of the insulating inner liner may be 5um to 200um.
In an embodiment of the present invention, the preparation material of the support microtubes includes a precursor slurry including a functional powder, an organic carrier, and a pore-forming agent. The functional powder comprises a first mixed powder, a second mixed powder, a conductive powder and a structural support powder. The first mixed powder comprises Ti in MAX phase ceramic material 2 AlC,Cr 2 AlC,Ta 2 AlC,Ti 2 AlN,Ti 3 AlC 2 ,Ti 4 AlN 3 ,Ta 4 AlC 3 ,Ta 6 AlC 5 ,Ti 5 Al 2 C 3 One or more of the following. The second mixed powder comprises nickel powder and/or copper powder.
The conductive powder comprises one or more of silver powder, gold powder, palladium powder, tungsten powder, tantalum powder, molybdenum powder and niobium powder, and the mass fraction of the conductive powder is 0-10wt% of the functional powder. Conductive powder is added into the functional powder to improve the conductivity of the support microtubes.
The structural support powder comprises one or more of aluminum oxide, silicon carbide, zirconium oxide, silicon nitride, boron nitride, titanium nitride and aluminum nitride structural ceramics, and the mass fraction of the structural support powder is 0-10wt% of the functional powder. Structural support powder is added into the functional powder to improve the mechanical strength of the support microtubes.
Further, pore formers are classified into inorganic and organic pore formers, and the present invention mainly uses organic pore formers. The organic pore-forming agent mainly comprises carbon black, corn flour, starch, cellulose, polymethyl methacrylate, phenolic resin, polyurethane microspheres, polystyrene microspheres, polyethylene glycol, ammonium bicarbonate and other substances which can volatilize at high temperature to generate carbon dioxide;
in an embodiment of the present invention, the organic vehicle is composed of a solvent, a binder (thickener), a thixotropic agent, a leveling agent, a flocculant, a surfactant (dispersant), etc., so that the precursor slurry is brought into good preparation conditions.
Fig. 3 to 4 are schematic structural views of a supported micro-tube type solid oxide fuel cell according to a second embodiment of the present invention.
Fig. 3 is a cross-sectional view of a supported micro-pipe solid oxide fuel cell in a second embodiment of the invention, the supported micro-pipe solid oxide fuel cell comprising: the support microtube 21 comprises a first support surface 211 and a second support surface 212 arranged opposite each other. A cathode layer 22 provided on the first support surface 211 of the support microtube 21. An electrolyte layer 23 is provided on the cathode layer 22, and the anode layer 24 is provided on the electrolyte layer 23. Thus, the above structure forms a microtube-type solid oxide fuel cell structure of the support microtube 21/cathode layer 22/electrolyte layer 23/anode layer 24.
Similarly, as shown in fig. 3, hollow portions 213 penetrating both ends in the longitudinal direction are provided in the support microtube 21, and the hollow portions 213 are used for passing air. It will be appreciated that, as shown in fig. 3, the support microtubes have a through-hole structure at both ends, and air flows through the hollow 213 in the X2 direction.
Fig. 4 is a plan view of a supported microtube type solid oxide fuel cell according to a second embodiment of the present invention, and it can be seen that the cathode layer 22, the electrolyte layer 23 and the anode layer 24 do not cover the entire length of the support microtube 21. Specifically, the length of the support microtube 21 is defined as B1, the length of the anode layer 24 is defined as B2, and the length of the portion of the first support surface 111 of the support microtube 11 not covered by the cathode layer 22 and the electrolyte layer 23 is defined as B4. Since the electrolyte layer 23 is coated on the cathode layer 22, the cathode layer 22 is not shown in fig. 2. The length B2 of the anode layer 24 is smaller than the length of the electrolyte layer 23, so that the electrolyte layer 23 has a portion of the surface not covered by the anode layer 24, the length of which is defined as B3, on which portion an insulating gas barrier 25 is provided. Similarly, the exposed portion of the electrolyte layer 23 is covered with the insulating airtight layer 25, and thus the electrolyte layer 23 is also not shown in fig. 4. The provision of the insulating inner liner 25 allows the first support surface 211 and the anode layer 24 to be in an insulating state while also providing a gas barrier for the electrolyte layer 23 so that the gases between the cathode layer 22 and the anode layer 24 do not leak from each other.
Preferably, the insulating inner liner 25 may be formed by uniformly brushing a glass medium paste on the surface of the electrolyte layer 23 and sintering at a high temperature.
Specifically, the length B3 of the insulating inner liner 25 may be 0.1% to 5% of the length B1 of the support microtube 21. The length B2 of the anode layer 24 may be greater than half the length B2 of the support microtubes 21, that is: the length B4 of the support microtubes 21 not covered by the anode layer 24 is smaller than the length B2 of the anode layer 24. The thickness of the insulating inner liner 25 may be 5um to 200um.
Specifically, in this embodiment, the preparation materials of the support microtubes are the same as those in the first embodiment, and will not be described here again.
Fig. 5-6 are schematic flow diagrams illustrating a method for preparing a supported micro-tube solid oxide fuel cell according to an embodiment of the present invention. Fig. 7 is a schematic view illustrating an electrophoretic deposition process according to an embodiment of the present invention, and fig. 8 is a sectional view illustrating an electrophoretic deposition cell according to an embodiment of the present invention. With reference to fig. 5-8, the preparation method comprises the following steps:
s1, performing ball milling and mixing on the first mixed powder, the second mixed powder, the conductive powder and the structural support powder to form functional powder, and adding an organic carrier and a pore-forming agent into the functional powder to prepare precursor slurry.
Wherein the first mixed powder is prepared from Ti in MAX phase ceramic material 2 AlC,Cr 2 AlC,Ta 2 AlC,Ti 2 AlN,Ti 3 AlC 2 ,Ti 4 AlN 3 ,Ta 4 AlC 3 ,Ta 6 AlC 5 ,Ti 5 Al 2 C 3 One or more of the above materials; the second mixed powder is composed of one or two of nickel powder and copper powder.
That is, ti in MAX phase conductive ceramic material is taken 2 AlC,Cr 2 AlC,Ta 2 AlC,Ti 2 AlN,Ti 3 AlC 2 ,Ti 4 AlN 3 ,Ta 4 AlC 3 ,Ta 6 AlC 5 ,Ti 5 Al 2 C 3 One or more of the powder, then adding nickel powder or copper powder for ball milling and mixing, and adding a proper amount of organic carrier and pore-forming agent into the obtained mixed powder to prepare precursor slurry.
S2, extruding or phase-converting the precursor slurry to obtain a support microtube blank, and drying and sintering the support microtube blank to obtain the support microtube.
Specifically, the precursor slurry is subjected to an extrusion method or a phase transformation method to obtain a support microtube blank, the support microtube blank is dried at a certain temperature of 30-200 ℃, the dried support microtube blank is sintered at a certain sintering temperature of 300-800 ℃ in an air atmosphere, then an inert reducing atmosphere is introduced, and the support microtube is obtained after sintering at a certain temperature of 800-1600 ℃.
And S3, preparing anode layer suspension, electrolyte layer suspension and cathode layer suspension.
Specifically, the electrophoretic suspension 36 is composed of the functional powder 33, a solvent, and an additive, an electrophoretic suspension containing the functional powder of the anode layer prepares the anode layer, an electrophoretic suspension containing the functional powder of the electrolyte layer prepares the electrolyte layer, and an electrophoretic suspension containing the functional powder of the cathode layer prepares the cathode layer.
The anode layer functional powder is formed by mixing nickel oxide and solid electrolyte powder, wherein the content of the nickel oxide is 40-80 wt%; the electrolyte layer functional powder is composed of solid electrolyte powder. The solid electrolyte powder is composed of one or more of yttrium doped stable zirconia, scandium doped stable ceria, samarium doped stable ceria and gadolinium doped stable ceria. The functional powder of the cathode layer is composed of perovskite ABO3 material and mainly comprises one of lanthanum manganate-based oxide, lanthanum strontium cobalt iron-based oxide and barium strontium cobalt iron-based oxide. The solvent of the electrophoresis suspension liquid mainly comprises one or more solvents of deionized water, methanol, ethanol, propanol, butanol, glycol, acetone, acetylacetone, cyclohexane, dichloromethane, methyl ethyl ketone, toluene, xylene and the like. The additive in the electrophoresis suspension is mainly used for improving the dispersibility and chargeability of the functional powder and mainly comprises iodine, acetic acid, oxalic acid, propionic acid, boric acid, phenol, benzoic acid, citric acid, lauric acid, phosphate, polyethylene glycol, polyethylene, polypropylene, polystyrene, polyvinyl butyral, polyacrylic acid, span series, tween series, stearic acid series and the like.
In an embodiment of the invention, the mass fraction of functional powder 33 in suspension 36 may be 1wt.% to 40wt.%.
S4, forming an anode layer, an electrolyte layer and a cathode layer on the support microtubes by adopting an electrophoresis process.
Specifically, as shown in fig. 7 to 8, a circular non-conductive container 38 may be taken, placed in a fixing bracket 37, the ring-shaped counter electrode 32 and the support microtube 31 are placed on the fixing bracket 37, and the ring-shaped counter electrode 32 and the support microtube 31 are respectively connected to a dc power supply 35; according to the deposition sequence, the prepared electrophoretic suspension 36 is poured into a container 38, a voltage is applied and the deposition time is controlled, and the electrophoretic suspension is replaced after the deposition is finished, so that the anode layer, the electrolyte layer and the cathode layer are sequentially deposited by electrophoresis, or the cathode layer, the electrolyte layer and the anode layer are sequentially plated.
Regulating the deposition voltage on the direct current power supply 35, wherein the deposition voltage is 1V-1000V; the deposition time is 1s-7200s. The counter electrode 32 for electrophoretic deposition adopts a ring-shaped structure, and the support microtube 31 is placed at the center of the ring-shaped counter electrode 32.
And S5, drying and sintering the support microtubes comprising the anode layer, the electrolyte layer and the cathode layer, thereby obtaining the support microtube type solid oxide fuel cell.
As shown in fig. 6, after step S5, the method further includes:
and S6, preparing the slurry of the insulating airtight layer, brushing the slurry on the outer surface of the support type microtube solid oxide fuel cell, and sintering the slurry to obtain the support type microtube solid oxide fuel cell with the insulating airtight layer.
Specifically, drying the SOFC prepared by electrophoresis at a certain temperature of 30-200 ℃, sintering at a high temperature of 800-1500 ℃ in an air atmosphere, preparing insulating airtight layer slurry, brushing the slurry on an electrolyte layer on the outer surface, and sintering at a high temperature to obtain a support SOFC single cell;
through controlling electrophoresis parameters, the thickness of the anode layer is 10um-50um, the thickness of the electrolyte layer is 1 um-50um, the thickness of the cathode layer is 10um-50um, and the thickness of the insulating airtight layer is 5 um-200 um.
In order to better illustrate the present invention, the following examples of some of the preparation methods of the support microtube solid oxide fuel cell are provided.
Example 1
Preparation of support microtubules: dissolving polyethersulfone and polyvinylpyrrolidone in N-methyl-2-pyrrolidone, adding Ti 3 AlC 2 The alloy comprises nickel powder, gold powder and silicon carbide, wherein the mass ratio of Ti3AlC2, nickel powder, gold powder and silicon carbide is 2:3:0.1:0.1, the total solid content is 60%, ball milling is carried out for 2 hours, the slurry is debubbled for 30 minutes, then the slurry is introduced into a double-hole stainless steel spinneret plate, 95vol.% of N-methyl-2-pyrrolidone and 5vol.% of deionized water are used as internal coagulant, tap water is used as external coagulant, a phase transition spinning method is adopted for spinning, the prepared support micro tube blank is dried at 50 ℃, sintered for 30 minutes at 500 ℃ in air atmosphere, then argon atmosphere is introduced, and high-temperature sintering is carried out for 60 minutes at 1300 ℃ to obtain the porous support micro tube.
Preparation of anode layer suspension, electrolyte layer suspension and cathode layer suspension: taking anode functional powder nickel oxide powder and yttrium-doped stable zirconium oxide powder according to the following 6:4, adding a proper amount of deionized water and ammonium polyacrylate, dispersing and mixing by using an ultrasonic homogenizer, and aging for 10 hours to ensure that the solid content of the anode functional powder is 10%, thus obtaining anode functional powder suspension; adding proper amounts of deionized water and ammonium polyacrylate into yttrium-doped stable zirconia powder serving as functional powder of an electrolyte layer, dispersing and mixing by using an ultrasonic homogenizer, and aging for 15 hours to ensure that the solid content of the functional powder of the electrolyte layer is 5%, thereby obtaining functional powder suspension of the electrolyte layer; and taking cathode functional powder lanthanum manganate-based oxide powder, adding a proper amount of deionized water and ammonium polyacrylate, using an ultrasonic homogenizer for dispersion mixing, and aging for 10 hours to ensure that the solid content of the cathode functional powder is 15%, thus obtaining cathode functional powder suspension.
Preparation of a supported microtube type solid oxide fuel cell: placing the support microtubes and the annular counter electrodes on a fixed support so that the distance between the support microtubes and the annular counter electrodes is 30mm, placing the support microtubes and the annular counter electrodes into a glass beaker, pouring anode functional powder suspension, and depositing for 60s under 20V voltage to obtain an anode layer; changing the suspension into an electrolyte layer suspension, and depositing for 20s at 15V voltage to obtain an electrolyte layer; changing the suspension into a cathode layer suspension, and depositing for 80s under the voltage of 30V to obtain a cathode layer; taking out the support microtubes, drying at 80 ℃, sintering for 30min in an air atmosphere at 1500 ℃, preparing insulating airtight layer slurry, brushing on an electrolyte layer on the outer surface, and sintering at high temperature to obtain the support microtube SOFC single cell.
Example 2
Preparation of support microtubules: dissolving proper amount of ethyl cellulose in terpineol, diethylene glycol butyl ether acetate and span 85, adding proper amount of starch as a pore-forming agent, and adding Ti2AlC, copper powder, tungsten powder and boron nitride, wherein the mass ratio of the Ti2AlC, the copper powder, the tungsten powder and the boron nitride is 1:1:0.05:0.05, rolling for 1 hour by a three-roll mill, removing bubbles from the slurry for 30 minutes, adding the slurry into an extruder, and extruding a support micro tube blank by adopting an extrusion method; drying the prepared support microtube blank at 100 ℃, sintering for 30min at 400 ℃ under the air atmosphere, then introducing argon and hydrogen atmosphere, and sintering for 40min at 1400 ℃ to obtain the porous support microtube.
Preparation of anode layer suspension, electrolyte layer suspension and cathode layer suspension: taking anode functional powder nickel oxide powder and gadolinium doped stable cerium oxide powder according to the following weight ratio of 1:1, adding a proper amount of absolute ethyl alcohol, phosphate and polymethyl methacrylate, using an ultrasonic homogenizer for dispersion mixing, and aging for 20 hours to ensure that the solid content of the anode functional powder is 8%, thus obtaining anode functional powder suspension; taking gadolinium-doped stable cerium oxide powder serving as electrolyte layer functional powder, adding a proper amount of absolute ethyl alcohol, phosphate and polyvinyl butyral, using an ultrasonic homogenizer to disperse and mix, and aging for 15 hours to ensure that the solid content of the electrolyte layer functional powder is 5%, thus obtaining electrolyte layer functional powder suspension; taking cathode functional powder lanthanum manganate-based oxide powder, adding a proper amount of absolute ethyl alcohol, polymethyl methacrylate and phosphate, using an ultrasonic homogenizer for dispersion and mixing, and aging for 20 hours to ensure that the solid content of the cathode functional powder is 10%, thus obtaining cathode functional powder suspension;
preparation of a supported microtube type solid oxide fuel cell: placing the support microtubes and the annular counter electrodes on a fixed support so that the distance between the support microtubes and the annular counter electrodes is 50mm, placing the support microtubes and the annular counter electrodes into a glass beaker, pouring cathode functional powder suspension, and depositing for 20s under 100V voltage to obtain a cathode layer; changing the suspension into an electrolyte layer suspension, and depositing for 5s under the voltage of 50V to obtain an electrolyte layer; changing the suspension into anode layer suspension, and depositing for 30s under 120V voltage to obtain an anode layer; taking out the support microtubes, drying at 50 ℃, sintering for 120min in an air atmosphere at 1400 ℃, preparing insulating airtight layer slurry, brushing on an electrolyte layer on the outer surface, and sintering at high temperature to obtain the support microtube SOFC single cell.
Example 3
Preparation of support microtubules: dissolving polyethersulfone and polyethylene glycol dimer hydroxystearate in N-methyl pyrrolidone and absolute ethyl alcohol, adding Cr 2 AlC, copper powder, silver powder, zirconia, wherein Cr 2 The mass ratio of AlC, copper powder, silver powder and zirconia is 3:2:0.2:0.1, total solid content is 55%, ball milling is carried out for 5 hours, slurry is defoamed for 30 minutes, then the slurry is led into a double-hole stainless steel spinneret plate, deionized water is used as an internal coagulant and an external coagulant, and a phase-transition spinning method is adoptedSpinning, namely drying the prepared support micro tube blank at 120 ℃, sintering for 30min at 600 ℃ in air atmosphere, then introducing nitrogen atmosphere, and sintering for 30min at 1500 ℃ to obtain the porous support micro tube.
Preparation of anode layer suspension, electrolyte layer suspension and cathode layer suspension: taking anode functional powder nickel oxide powder and samarium doped stable cerium oxide powder according to the following 6:4, adding proper amount of absolute ethyl alcohol, phosphate and iodine solution, using an ultrasonic homogenizer to disperse and mix, and aging for 5 hours to ensure that the solid content of the anode functional powder is 5%, thus obtaining anode functional powder suspension; adding proper amount of absolute ethyl alcohol, phosphate, iodine solution and polyethylene glycol into stable cerium oxide powder doped with functional powder samarium of an electrolyte layer, using an ultrasonic homogenizer for dispersion and mixing, and aging for 10 hours to ensure that the solid content of the functional powder of the electrolyte layer is 5%, thus obtaining functional powder suspension of the electrolyte layer; taking cathode functional powder lanthanum strontium cobalt iron-based oxide powder, adding a proper amount of absolute ethyl alcohol, iodine solution and phosphate, using an ultrasonic homogenizer for dispersion mixing, and aging for 8 hours to ensure that the solid content of the cathode functional powder is 5%, thus obtaining cathode functional powder suspension.
Preparation of a supported microtube type solid oxide fuel cell: placing the support microtubes and the annular counter electrodes on a fixed support so that the distance between the support microtubes and the annular counter electrodes is 80mm, placing the support microtubes and the annular counter electrodes into a plastic beaker, pouring anode functional powder suspension, and depositing for 60s under 200V voltage to obtain an anode layer; changing the suspension into an electrolyte layer suspension, and depositing for 20s at 150V voltage to obtain an electrolyte layer; changing the suspension into a cathode layer suspension, and depositing for 80s under 300V voltage to obtain a cathode layer; taking out the support microtubes, drying at 60 ℃, sintering for 90min in an air atmosphere at 1200 ℃, preparing insulating airtight layer slurry, brushing on an electrolyte layer on the outer surface, and sintering at high temperature to obtain the support microtube SOFC single cell.
Example 4
Preparation of support microtubules: dissolving appropriate amount of methylcellulose in terpineol, dibutyl phthalate and 1-4 butyrolactone, adding appropriate amount of carbon black as pore-forming agent, and adding Ta 2 AlC, niPowder, molybdenum powder, aluminum nitride powder, among which Ta 2 The mass ratio of AlC, nickel powder, molybdenum powder and aluminum nitride powder is 1:1:0.2:0.1, dispersing for 1 hour with a high-speed dispersing machine, removing bubbles from the slurry for 40 minutes, adding the slurry into an extruder, extruding a support micro tube blank by adopting an extrusion method, drying the prepared support micro tube blank at 100 ℃, sintering at 500 ℃ for 60 minutes in an air atmosphere, introducing nitrogen and hydrogen atmosphere, and sintering at 1200 ℃ for 90 minutes to obtain the porous support micro tube.
Preparation of anode layer suspension, electrolyte layer suspension and cathode layer suspension: taking anode functional powder nickel oxide powder and scandium-doped stable cerium oxide powder according to the following weight ratio of 1:1, adding a proper amount of ethanol, acetylacetone and polyvinyl alcohol, using an ultrasonic homogenizer to disperse and mix, and aging for 10 hours to ensure that the solid content of the anode functional powder is 20%, thus obtaining anode functional powder suspension; taking gadolinium-doped stable cerium oxide powder serving as electrolyte layer functional powder, adding a proper amount of ethanol, acetylacetone, polyvinyl alcohol and polyvinyl butyral, using an ultrasonic homogenizer to disperse and mix, and aging for 15 hours to ensure that the solid content of the electrolyte layer functional powder is 15%, thus obtaining electrolyte layer functional powder suspension; taking cathode functional powder lanthanum manganate-based oxide powder, adding a proper amount of ethanol, acetylacetone and phosphate, using an ultrasonic homogenizer for dispersion mixing, and aging for 10 hours to ensure that the solid content of the cathode functional powder is 20%, thus obtaining cathode functional powder suspension.
Preparation of a supported microtube type solid oxide fuel cell: placing the support microtubes and the annular counter electrodes on a fixed support so that the distance between the support microtubes and the annular counter electrodes is 10mm, placing the support microtubes and the annular counter electrodes into a glass beaker, pouring cathode functional powder suspension, and depositing for 1000s under 10V voltage to obtain a cathode layer; changing the suspension into an electrolyte layer suspension, and depositing for 500s at 5V voltage to obtain an electrolyte layer; changing the suspension into anode layer suspension, and depositing for 2000s under 12V voltage to obtain an anode layer; taking out the support microtubes, drying at 150 ℃, sintering for 90min in 1300 ℃ air atmosphere, preparing insulating airtight layer slurry, brushing on the electrolyte layer on the outer surface, and sintering at high temperature to obtain the support microtube SOFC single cell.
Example 5
Preparation of support microtubules: dissolving polysulfone and polyvinylpyrrolidone in N-methylpyrrolidone and absolute ethanol, adding Ti4AlN3, copper powder, nickel powder, platinum powder and silicon oxide powder, wherein Ti is 4 AlN 3 The mass ratio of the copper powder to the nickel powder to the platinum powder to the silicon oxide powder is 1:1:1:0.05:0.1, the solid content is 52%, ball milling is carried out for 5 hours, the slurry is defoamed for 20 minutes, then the slurry is introduced into a double-hole stainless steel spinneret plate, deionized water and absolute ethyl alcohol are used as internal coagulant, deionized water is used as external coagulant, a phase transition spinning method is adopted for spinning, the prepared support microtube blank is dried at 180 ℃, sintered for 10 minutes at 700 ℃ in air atmosphere, then nitrogen atmosphere is introduced, and sintered for 180 minutes at 1100 ℃ at high temperature, thus obtaining the porous support microtube.
Preparation of anode layer suspension, electrolyte layer suspension and cathode layer suspension: taking anode functional powder nickel oxide powder and yttrium-doped stable zirconium oxide powder according to the following 6:4, adding proper amount of acetone, phosphate and iodine solution, using an ultrasonic homogenizer to disperse and mix, and aging for 30 hours to ensure that the solid content of the anode functional powder is 25%, thus obtaining anode functional powder suspension; adding proper amount of acetone, phosphate, iodine solution and polystyrene into yttrium doped stable zirconium oxide powder serving as functional powder of an electrolyte layer, using an ultrasonic homogenizer to disperse and mix, and aging for 30 hours to ensure that the solid content of the functional powder of the electrolyte layer is 20%, thus obtaining functional powder suspension of the electrolyte layer; taking cathode functional powder barium strontium cobalt iron-based oxide powder, adding a proper amount of acetone, phosphate and iodine solution, using an ultrasonic homogenizer for dispersion mixing, and aging for 40 hours to ensure that the solid content of the cathode functional powder is 15%, thus obtaining cathode functional powder suspension.
Preparation of a supported microtube type solid oxide fuel cell: placing the support microtubes and the annular counter electrodes on a fixed support so that the distance between the support microtubes and the annular counter electrodes is 100mm, placing the support microtubes and the annular counter electrodes into a plastic beaker, pouring cathode functional powder suspension, and depositing for 300s under 500V voltage to obtain a cathode layer; changing the suspension into an electrolyte layer suspension, and depositing for 50s at 500V voltage to obtain an electrolyte layer; changing the suspension into anode layer suspension, and depositing for 400s under 400V voltage to obtain an anode layer; taking out the support microtubes, drying at 40 ℃, sintering for 180min in an air atmosphere at 1000 ℃, preparing insulating airtight layer slurry, brushing on an electrolyte layer on the outer surface, and sintering at high temperature to obtain the support microtube SOFC single cell.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.