CN103326031A - One-dimensional SYCO cathode material and preparation method and method to prepare composite cathode by using the cathode material - Google Patents

One-dimensional SYCO cathode material and preparation method and method to prepare composite cathode by using the cathode material Download PDF

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CN103326031A
CN103326031A CN2013102294927A CN201310229492A CN103326031A CN 103326031 A CN103326031 A CN 103326031A CN 2013102294927 A CN2013102294927 A CN 2013102294927A CN 201310229492 A CN201310229492 A CN 201310229492A CN 103326031 A CN103326031 A CN 103326031A
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syco
cathode
dimension
fibrous
cathode material
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熊岳平
刘连宝
樊丽权
王宇威
赵力
贾铮
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

The present invention discloses a one-dimensional SYCO cathode material and a preparation method and a method to prepare composite cathode by using the cathode material, and refers to a fuel cell cathode, a preparation method and the application thereof. The invention solves the problem of big interface polarized impedance of cathode material. The chemical formula of the one-dimensional nanometer fibrous SYCO cathode material is Sr1-xYxCoO3-Delta, and the SYCO cathode material is obtained through static spinning. The preparation of the composite cathode comprises the steps of a. preparing fibrous SYCO cathode slurry; b. coating the cathode slurry on an electrolyte and sintering to obtain an SYCO cathode skeleton; c. dipping the cathode skeleton in an electrolyte forerunner liquid and calcining to attach the electrolyte onto the cathode skeleton; and d. repeating step c to increase the electrolyte attached on the cathode skeleton gradually, and calcining to obtain composite cathode. The AC impedance of composite cathode obtained in the invention is up to 0.310 omega cm 2. The invention is mainly applied in solid oxide fuel cells.

Description

One dimension SYCO cathode material and its preparation method and application this cathode material prepares the method for composite cathode
Technical field
The present invention relates to the method that a kind of cathode material for solid-oxide fuel cell, preparation method and application thereof prepare composite cathode.
Background technology
Solid Oxide Fuel Cell (SOFC) is a kind of all solid state Blast Furnace Top Gas Recovery Turbine Unit (TRT) that directly chemical energy is converted into electric energy, is comprised of solid electrolyte, anode (fuel electrodes), negative electrode (air pole), connector or bipolar plates and encapsulant etc.Solid Oxide Fuel Cell has that energy utilization rate is high, fuel source is extensive, noise is low, without advantages such as noxious gas emissions, be the novel energy system of the existing fossil resource of a kind of efficient utilization.
The negative electrode of Solid Oxide Fuel Cell claims again air electrode, is the electron acceptor of external electrical conductive loop.On air electrode, airborne oxygen and electron reaction form O 2-, subsequently by solid electrolyte (O 2-Ion-conducting material) be transferred to anode and fuel reaction, SOFC has finished the process that chemical energy is directly changed into electric energy thus.Negative electrode is as the important component part of Solid Oxide Fuel Cell, and the high performance cathodes material preparation is very important.Contain the cobalt perovskite oxide because ion electronics mixed conducting gets more and more people's extensive concerning.Y doping SrCoO 3Showing good cathode performance in 600 ℃～1000 ℃ temperature ranges, is the SOFC cathode material with applications well prospect.But because the deficiency of existing cathode material for solid-oxide fuel cell and electrode fabrication, cause the cathode interface polarization impedance for preparing large.
The electrode of monodimension nanometer material preparation owing to having good three-dimensional space net structure, is conducive to releasing heat and impacts the strain that produces, and reduces between electrode material and the supporter because the performance degradation that gap causes between thermal coefficient of expansion; Simultaneously, tridimensional network is conducive to suppress the agglomeration of nano material, prevents that electrode from use producing concentration polarization and then improving electrode performance.Further behind the dipping electrolyte, the three phase boundary of electrode increases greatly, is conducive to further improve its electro-chemical activity.
Summary of the invention
To the objective of the invention is to have the large problem of oxide fuel battery cathode interfacial polarization impedance now in order solving, and to provide one dimension SYCO cathode material and its preparation method and application this cathode material to prepare the method for composite cathode.
The chemical formula of one dimension SYCO cathode material of the present invention is Sr 1-xY xCoO 3-δ, 0≤x≤1 wherein, structure is that 1-dimention nano is fibrous.
The preparation method of one dimension SYCO cathode material of the present invention follows these steps to realize:
One, according to chemical formula Sr 1-xY xCoO 3-δ0≤x≤1 wherein, be that 1-x ﹕ x ﹕ 1 takes by weighing respectively strontium nitrate, yttrium nitrate and cobalt nitrate by Sr element, Y element and Co element mol ratio, then strontium nitrate, yttrium nitrate and cobalt nitrate are joined N, in the dinethylformamide, at room temperature magnetic agitation to strontium nitrate, yttrium nitrate and cobalt nitrate dissolves fully, adds the polyvinylpyrrolidone stirring and obtains the electrostatic spinning precursor liquid, obtains nanofiber through electrostatic spinning again;
Two, nanofiber is warming up to 300 ° of C with the speed of 2 ℃/min～10 ℃/min, then constant temperature sintering 1～2h continues to be warming up to 700～1000 ℃, continues sintering 1～2h, obtains one dimension SYCO cathode material;
Wherein the total mass concentration of strontium nitrate, yttrium nitrate and cobalt nitrate is 5%～20% in the step 1 electrostatic spinning precursor liquid, and the mass concentration of polyvinylpyrrolidone is 6%～15%.
Using the method that one dimension SYCO cathode material of the present invention prepares one dimension SYCO base composite cathode follows these steps to realize:
One, the one dimension SYCO cathode material after will sieving joins in the absolute ethyl alcohol and disperses, and adds mass concentration again and be the terpineol solution of 3% ethyl cellulose, obtains the fibrous SYCO cathode slurry of 1-dimention nano after stirring 4～8h;
Two, the fibrous SYCO cathode slurry of the 1-dimention nano that step 1 is obtained is coated on the electrolyte, then the fibrous SYCO cathode slurry of 1-dimention nano that is coated on the electrolyte is warming up to 950～1100 ℃ with the speed of 5 ℃/min～15 ℃/min, cool to room temperature behind sintering 0.1～2h, obtain the fibrous SYCO negative electrode of 1-dimention nano skeleton;
Three, by 15～40 μ L/cm 2Electrolyte precursor liquid evenly is impregnated in the fibrous SYCO negative electrode of the 1-dimention nano skeleton, then the fibrous SYCO negative electrode of the 1-dimention nano skeleton after will flooding is calcined 1～2h under 300～600 ℃ condition, obtain adhering to the fibrous SYCO negative electrode of electrolytical 1-dimention nano skeleton;
Four, repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.1～0.6 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton, then place temperature lower calcination 1～2h of 750～800 ℃, obtain one dimension SYCO base composite cathode.
The present invention adopts method of electrostatic spinning to prepare one dimension SYCO cathode material, has reduced follow-up required sintering temperature.And be prepared into the one dimension SYCO base composite cathode with tridimensional network with this material, this composite cathode has continuous electrical conductance path and suitable porosity, reduced electrode concentration polarization and electrochemical polarization in use, reactivity is high, and impedance is little.By with electrolyte precursor liquid (Ce 0.8Gd 0.2O 1.9) evenly be impregnated in the fibrous SYCO negative electrode of the 1-dimention nano skeleton, make evenly the distribute electrolyte of one deck porous of electrode material surface, this dielectric substrate can be when keeping its original porousness, electronic conductivity, improve the ionic conductivity of three interface length and electrode, make the AC impedance minimum of the one dimension SYCO base composite cathode under 700 ℃ reach 0.310 Ω cm 2, thermal shock resistance is good.
Description of drawings
Fig. 1 is the scanning electron microscope (SEM) photograph of the one dimension SYCO cathode material that obtains of embodiment one;
Fig. 2 is the scanning electron microscope (SEM) photograph of the fibrous SYCO cathode slurry of 1-dimention nano that step 1 obtains among the embodiment two;
Fig. 3 is the scanning electron microscope (SEM) photograph of the fibrous SYCO negative electrode of the 1-dimention nano skeleton that step 2 obtains among the embodiment two;
Fig. 4 is the scanning electron microscope (SEM) photograph of the one dimension SYCO base composite cathode that step 2 obtains among the embodiment two.
Embodiment
Embodiment one: the chemical formula of present embodiment one dimension SYCO cathode material is Sr 1-xY xCoO 3-δ, 0≤x≤1 wherein, structure is that 1-dimention nano is fibrous.
The fibrous cathode material Sr of present embodiment 1-dimention nano 1-xY xCoO 3-δ, wherein x gets 0≤x≤1, and wherein δ gets 0≤δ≤0.5, is perovskite structural material.The diameter of the fibrous cathode material of 1-dimention nano is 200～300nm.
Embodiment two: the preparation method of present embodiment one dimension SYCO cathode material follows these steps to implement:
One, according to chemical formula Sr 1-xY xCoO 3-δ0≤x≤1 wherein, be that 1-x ﹕ x ﹕ 1 takes by weighing respectively strontium nitrate, yttrium nitrate and cobalt nitrate by Sr element, Y element and Co element mol ratio, then strontium nitrate, yttrium nitrate and cobalt nitrate are joined N, in the dinethylformamide, at room temperature magnetic agitation to strontium nitrate, yttrium nitrate and cobalt nitrate dissolves fully, adds the polyvinylpyrrolidone stirring and obtains the electrostatic spinning precursor liquid, obtains nanofiber through electrostatic spinning again;
Two, nanofiber is warming up to 300 ° of C with the speed of 2 ℃/min～10 ℃/min, then constant temperature sintering 1～2h continues to be warming up to 700～1000 ℃, continues sintering 1～2h, obtains one dimension SYCO cathode material;
Wherein the total mass concentration of strontium nitrate, yttrium nitrate and cobalt nitrate is 5%～20% in the step 1 electrostatic spinning precursor liquid, and the mass concentration of polyvinylpyrrolidone is 6%～15%.
Embodiment three: what present embodiment and embodiment two were different is that the total mass concentration of yttrium nitrate, strontium nitrate and cobalt nitrate is 15% in the described electrostatic spinning precursor liquid of step 1.Other step and parameter are identical with embodiment two.
Embodiment four: present embodiment is different from embodiment two or three is that the mass concentration of polyvinylpyrrolidone in the described electrostatic spinning precursor liquid of step 1 is 10%.Other step and parameter are identical with embodiment two or three.
Embodiment five: what present embodiment was different from one of embodiment two to four is that step 1 electrostatic spinning process is that the electrostatic spinning precursor liquid is joined in the syringe, syringe nozzle is linked to each other with high-voltage power cathode, receiving system is connected with negative pole, adopting diameter is the electrostatic spinning nozzle of 0.6～0.8mm, it is 20～30 ℃ in temperature, humidity is 20～35, and voltage is 10～30kV, and receiving range is to carry out electrostatic spinning under the condition of 15cm.Other step and parameter are identical with one of embodiment two to four.
Embodiment six: the method that present embodiment application one dimension SYCO cathode material prepares one dimension SYCO base composite cathode follows these steps to implement:
One, the one dimension SYCO cathode material after will sieving joins in the absolute ethyl alcohol and disperses, and adds mass concentration again and be the terpineol solution of 3% ethyl cellulose, obtains the fibrous SYCO cathode slurry of 1-dimention nano after stirring 4～8h;
Two, the fibrous SYCO cathode slurry of the 1-dimention nano that step 1 is obtained is coated on the electrolyte, then the fibrous SYCO cathode slurry of 1-dimention nano that is coated on the electrolyte is warming up to 950～1100 ℃ with the speed of 5 ℃/min～15 ℃/min, cool to room temperature behind sintering 0.1～2h, obtain the fibrous SYCO negative electrode of 1-dimention nano skeleton;
Three, by 15～40 μ L/cm 2Electrolyte precursor liquid evenly is impregnated in the fibrous SYCO negative electrode of the 1-dimention nano skeleton, then the fibrous SYCO negative electrode of the 1-dimention nano skeleton after will flooding is calcined 1～2h under 300～600 ℃ condition, obtain adhering to the fibrous SYCO negative electrode of electrolytical 1-dimention nano skeleton;
Four, repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.1～0.6 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton, then place temperature lower calcination 1～2h of 750～800 ℃, obtain one dimension SYCO base composite cathode.
The present embodiment step 3 evenly is impregnated into electrolyte precursor liquid in the fibrous SYCO negative electrode of the 1-dimention nano skeleton, that the electrolyte precursor drop is added on the fibrous SYCO negative electrode of the 1-dimention nano skeleton, until the absorption of the fibrous SYCO negative electrode of 1-dimention nano skeleton is saturated, namely continuing to drip electrolyte precursor liquid will flow out.
Present embodiment is to obtain the fibrous SYCO negative electrode of 1-dimention nano skeleton by step 1 and two, this SYCO negative electrode skeleton is as supporter take electrolyte, adhere to one dimension SYCO nanofiber at supporter, and then take nanofiber SYCO negative electrode as matrix, adhere to electrolyte granular thereon, and then obtain one dimension SYCO base composite cathode.
Embodiment seven: present embodiment and embodiment six are different is that step 1 adds terpineol solution that mass concentration is 3% ethyl cellulose and the mass ratio of one dimension SYCO cathode material is 1 ﹕ 1.Other step and parameter are identical with embodiment six.
Embodiment eight: present embodiment is different from embodiment six or seven, and to be the step 2 electrolyte that applied the fibrous cathode slurry of 1-dimention nano be warming up to 950 ℃, sintering 0.5h with the speed of 15 ℃/min.Other step and parameter are identical with embodiment six or seven.
Embodiment nine: what present embodiment was different from one of embodiment six to eight is that the described electrolyte of step 2 is the Zirconia electrolytic of yttrium doping, the cerium oxide electrolyte that lanthanum mixes, the cerium oxide electrolyte that samarium mixes, the cerium oxide electrolyte that gadolinium mixes, cerium oxide electrolyte or the lanthanum strontium gallium magnesium eletrolysis matter that yttrium mixes.Other step and parameter are identical with one of embodiment six to eight.
Embodiment ten: what present embodiment was different from one of embodiment six to nine is that the described electrolyte precursor liquid of step 3 is cerium oxide electrolyte precursor liquid, the cerium oxide electrolyte precursor liquid that samarium mixes, the cerium oxide electrolyte precursor liquid of gadolinium doping or the cerium oxide electrolyte precursor liquid that yttrium mixes that lanthanum mixes.Other step and parameter are identical with one of embodiment six to nine.
Embodiment 11: what present embodiment was different from one of embodiment six to ten is that step 4 repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.3～0.5 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton.Other step and parameter are identical with one of embodiment six to ten.
Embodiment one: the preparation method of the present embodiment one dimension SYCO cathode material follows these steps to realize:
One, according to chemical formula Sr 0.7Y 0.3CoO 2.65By Sr element, Y element and Co element mol ratio be 0.7 ﹕, 0.3 ﹕ 1 take by weighing respectively 1.0154 the gram strontium nitrates, 0.7915 the gram yttrium nitrate and 2.0048 the gram cobalt nitrates, then strontium nitrate, yttrium nitrate and cobalt nitrate are joined 20ml N, in the dinethylformamide, at room temperature magnetic agitation to strontium nitrate, yttrium nitrate and cobalt nitrate dissolves fully, add the polyvinylpyrrolidone stirring and obtained the electrostatic spinning precursor liquid in 6 hours, obtain nanofiber through electrostatic spinning again;
Two, nanofiber is warming up to 300 ° of C with the speed of 2 ℃/min, then constant temperature sintering 2h continues to be warming up to 900 ℃, continues sintering 2h, obtains one dimension SYCO cathode material;
Wherein the total mass concentration of strontium nitrate, yttrium nitrate and cobalt nitrate is 15% in the step 1 electrostatic spinning precursor liquid, and the mass concentration of polyvinylpyrrolidone is 8%.
The scanning electron microscope (SEM) photograph of the one dimension SYCO cathode material that the present embodiment obtains as shown in Figure 1, from this figure as can be known the diameter of the fibrous cathode material of 1-dimention nano be 200～300nm, fiber thickness is even, smooth surface.
Embodiment two: the method that the one dimension SYCO cathode material that the present embodiment Application Example one obtains prepares one dimension SYCO base composite cathode follows these steps to realize:
One, will cross the gram of 0.5 behind 1600 mesh sieves one dimension SYCO cathode material and join in the 1mL absolute ethyl alcohol and disperse, add again 0.5 gram mass concentration and be the terpineol solution of 3% ethyl cellulose, obtain the fibrous SYCO cathode slurry of 1-dimention nano after stirring 4h;
Two, the fibrous SYCO cathode slurry of the 1-dimention nano that step 1 is obtained is coated to GDC(Ce 0.8Gd 0.2O 1.9) on the electrolyte, then the fibrous SYCO cathode slurry of 1-dimention nano that is coated on the electrolyte is warming up to 950 ℃ with the speed of 15 ℃/min, cool to room temperature behind the sintering 0.5h, obtain the fibrous SYCO negative electrode of 1-dimention nano skeleton;
Three, by 25 μ L/cm 2Electrolyte precursor liquid evenly is impregnated in the fibrous SYCO negative electrode of the 1-dimention nano skeleton, and the fibrous SYCO negative electrode of the 1-dimention nano skeleton after then will flooding is calcined 2h under 450 ℃ condition, obtain adhering to the fibrous SYCO negative electrode of electrolytical 1-dimention nano skeleton;
Four, repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.466 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton, then place 800 ℃ temperature lower calcination 2h, obtain one dimension SYCO base composite cathode.
Wherein the electrolyte in the described electrolyte precursor liquid of step 3 is Ce 0.8Gd 0.2O 1.9, its preparation method is for taking by weighing 1.128 gram gadolinium nitrates and 4.342 gram cerous nitrates, and then being dissolved in 50ml deionized water and absolute ethyl alcohol volume ratio is in the mixed liquor of 4:3, and magnetic agitation 4h obtains electrolyte precursor liquid.
The scanning electron microscope (SEM) photograph of the fibrous SYCO cathode slurry of the 1-dimention nano that the present embodiment step 1 obtains as shown in Figure 2, the SYCO monodimension nanometer material is uniformly dispersed and has kept fibrous morphology in the cathode slurry as can be known.
The present embodiment step 2 is warming up to 950 ℃ with the speed of 15 ℃/min, at 950 ℃ of lower sintering, the fibre length of the fibrous SYCO negative electrode of the 1-dimention nano that obtains skeleton is 1～5 micron, if improve sintering temperature, although can keep the pattern of monodimension nanometer material, fibre length can reduce to some extent.
The scanning electron microscope (SEM) photograph of the fibrous SYCO negative electrode of the 1-dimention nano that the present embodiment step 2 obtains skeleton as shown in Figure 3.
The scanning electron microscope (SEM) photograph of the one dimension SYCO base composite cathode that the present embodiment obtains as shown in Figure 4.
With the platinum filament that sticks to the electrolytic strip edge as reference electrode, porous platinum as the three-electrode system to electrode, the one dimension SYCO base composite cathode that the present embodiment is obtained is with the heating rate of 5 ℃/min, be heated to 700 ° of C from room temperature, and under this temperature, carry out ac impedance spectroscopy and test, measuring frequency is 1MHz-0.01Hz, interference voltage is 5mV, and the impedance that obtains the present embodiment one dimension SYCO base composite cathode is 0.310 Ω cm 2When this pickup, electrode material surface one deck porous GDC electrolyte that evenly distributed, this dielectric substrate can improve the ionic conductivity of three interface length and electrode when keeping its original porousness, electronic conductivity, thereby improves the chemical property of composite cathode.
Embodiment three: what the present embodiment and embodiment two were different is that step 4 repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.232 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton.Other step and parameter are identical with embodiment two.
The impedance of the one dimension SYCO base composite cathode that the present embodiment obtains is 0.615 Ω cm 2
Embodiment four: what the present embodiment and embodiment two were different is that step 4 repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.412 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton.Other step and parameter are identical with embodiment two.
The impedance of the one dimension SYCO base composite cathode that the present embodiment obtains is 0.525 Ω cm 2
Embodiment five: what the present embodiment and embodiment two were different is that step 4 repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.539 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton.Other step and parameter are identical with embodiment two.
The impedance of the one dimension SYCO base composite cathode that the present embodiment obtains is 0.523 Ω cm 2
Embodiment six: what the present embodiment and embodiment two were different is that step 4 repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.587 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton.Other step and parameter are identical with embodiment two.
The impedance of the one dimension SYCO base composite cathode that the present embodiment obtains is 2.245 Ω cm 2

Claims (8)

1. one dimension SYCO cathode material, the chemical formula that it is characterized in that one dimension SYCO cathode material is Sr 1-xY xCoO 3-δ, 0≤x≤1 wherein, structure is that 1-dimention nano is fibrous.
2. the preparation method who prepares one dimension SYCO cathode material as claimed in claim 1 is characterized in that the preparation method of one dimension SYCO cathode material follows these steps to realize:
One, according to chemical formula Sr 1-xY xCoO 3-δ0≤x≤1 wherein, be that 1-x ﹕ x ﹕ 1 takes by weighing respectively strontium nitrate, yttrium nitrate and cobalt nitrate by Sr element, Y element and Co element mol ratio, then strontium nitrate, yttrium nitrate and cobalt nitrate are joined N, in the dinethylformamide, at room temperature magnetic agitation to strontium nitrate, yttrium nitrate and cobalt nitrate dissolves fully, adds the polyvinylpyrrolidone stirring and obtains the electrostatic spinning precursor liquid, obtains nanofiber through electrostatic spinning again;
Two, nanofiber is warming up to 300 ° of C with the speed of 2 ℃/min～10 ℃/min, then constant temperature sintering 1～2h continues to be warming up to 700～1000 ℃, continues sintering 1～2h, obtains one dimension SYCO cathode material;
Wherein the total mass concentration of strontium nitrate, yttrium nitrate and cobalt nitrate is 5%～20% in the step 1 electrostatic spinning precursor liquid, and the mass concentration of polyvinylpyrrolidone is 6%～15%.
3. the preparation method of one dimension SYCO cathode material according to claim 2 is characterized in that yttrium nitrate in the described electrostatic spinning precursor liquid of step 1, strontium nitrate and the total mass concentration of cobalt nitrate are 15%.
4. the preparation method of one dimension SYCO cathode material according to claim 2, it is characterized in that step 1 electrostatic spinning process is that the electrostatic spinning precursor liquid is joined in the syringe, syringe nozzle is linked to each other with high-voltage power cathode, receiving system is connected with negative pole, adopting diameter is the electrostatic spinning nozzle of 0.6～0.8mm, is 20～30 ℃ in temperature, and humidity is 20～35, voltage is 10～30kV, and receiving range is to carry out electrostatic spinning under the condition of 15cm.
5. use the method that one dimension SYCO cathode material as claimed in claim 1 prepares one dimension SYCO base composite cathode, it is characterized in that using the method that one dimension SYCO cathode material prepares one dimension SYCO base composite cathode and follow these steps to realize:
One, the one dimension SYCO cathode material after will sieving joins in the absolute ethyl alcohol and disperses, and adds mass concentration again and be the terpineol solution of 3% ethyl cellulose, obtains the fibrous SYCO cathode slurry of 1-dimention nano after stirring 4～8h;
Two, the fibrous SYCO cathode slurry of the 1-dimention nano that step 1 is obtained is coated on the electrolyte, then the fibrous SYCO cathode slurry of 1-dimention nano that is coated on the electrolyte is warming up to 950～1100 ℃ with the speed of 5 ℃/min～15 ℃/min, cool to room temperature behind sintering 0.1～2h, obtain the fibrous SYCO negative electrode of 1-dimention nano skeleton;
Three, by 15～40 μ L/cm 2Electrolyte precursor liquid evenly is impregnated in the fibrous SYCO negative electrode of the 1-dimention nano skeleton, then the fibrous SYCO negative electrode of the 1-dimention nano skeleton after will flooding is calcined 1～2h under 300～600 ℃ condition, obtain adhering to the fibrous SYCO negative electrode of electrolytical 1-dimention nano skeleton;
Four, repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.1～0.6 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton, then place temperature lower calcination 1～2h of 750～800 ℃, obtain one dimension SYCO base composite cathode;
Wherein the chemical formula of the described one dimension SYCO of step 1 cathode material is Sr 1-xY xCoO 3-δ, 0≤x≤1 wherein, structure is that 1-dimention nano is fibrous.
6. application one dimension SYCO cathode material according to claim 5 prepares the method for one dimension SYCO base composite cathode, it is characterized in that electrolyte that step 2 applied the fibrous cathode slurry of 1-dimention nano is warming up to 950 ℃, sintering 0.5h with the speed of 15 ℃/min.
7. application one dimension SYCO cathode material according to claim 5 prepares the method for one dimension SYCO base composite cathode, it is characterized in that the described electrolyte of step 2 is the Zirconia electrolytic of yttrium doping, the cerium oxide electrolyte that lanthanum mixes, the cerium oxide electrolyte that samarium mixes, the cerium oxide electrolyte that gadolinium mixes, cerium oxide electrolyte or the lanthanum strontium gallium magnesium eletrolysis matter that yttrium mixes.
8. application one dimension SYCO cathode material according to claim 5 prepares the method for one dimension SYCO base composite cathode, it is characterized in that step 4 repeating step three is to adhering to 1-dimention nano fibrous SYCO negative electrode skeleton and electrolytical mass ratio to 1 ︰ 0.3～0.5 in the fibrous SYCO negative electrode of the electrolytical 1-dimention nano skeleton.
CN2013102294927A 2013-06-06 2013-06-06 One-dimensional SYCO cathode material and preparation method and method to prepare composite cathode by using the cathode material Pending CN103326031A (en)

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CN114873627A (en) * 2022-06-09 2022-08-09 内蒙古工业大学 In-situ preparation method of independently supported cerium oxide nanotube
CN115084549A (en) * 2022-08-18 2022-09-20 佛山仙湖实验室 Nano perovskite electrode for solid oxide battery and preparation method thereof

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Application publication date: 20130925