CN103618101A - Electrolyte material for solid oxide fuel battery and preparation method of material - Google Patents
Electrolyte material for solid oxide fuel battery and preparation method of material Download PDFInfo
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- CN103618101A CN103618101A CN201310703799.6A CN201310703799A CN103618101A CN 103618101 A CN103618101 A CN 103618101A CN 201310703799 A CN201310703799 A CN 201310703799A CN 103618101 A CN103618101 A CN 103618101A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M8/124—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
- H01M8/1246—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
- H01M8/1253—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides the electrolyte containing zirconium oxide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M8/124—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
- H01M8/1246—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M8/124—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte
- H01M8/1246—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides
- H01M8/126—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte characterised by the process of manufacturing or by the material of the electrolyte the electrolyte consisting of oxides the electrolyte containing cerium oxide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/10—Fuel cells with solid electrolytes
- H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
- H01M2008/1293—Fuel cells with solid oxide electrolytes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
- H01M2300/0071—Oxides
- H01M2300/0074—Ion conductive at high temperature
- H01M2300/0077—Ion conductive at high temperature based on zirconium oxide
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0085—Immobilising or gelification of electrolyte
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention provides an electrolyte material for a solid oxide fuel battery and a preparation method of the material. The electrolyte material consists of scandium oxide, cerium oxide and zirconium oxide, wherein the scandium oxide, the cerium oxide and the zirconium oxide are mixed according to a mol ratio of (9-11):1:(88-90). By adopting the scandium oxide and the cerium oxide, the process for converting a phase C of a cubic structure in the zirconium oxide to a phase beta with low electric conductivity can be inhibited, so that after the electrolyte material is used for preparing an SOFC (solid oxide fuel cell), the electric conductivity of the SOFC at the temperature of 780 DEG C is equivalent to that of YSZ (yttria stabilization zirconia) at the temperature of 1000 DEG C, the electric conductivity of the fuel battery at the low temperature can be improved, the energy transformation efficiency can be improved, and the cost of the fuel battery can be reduced.
Description
Technical field
The present invention relates to Solid Oxide Fuel Cell (SOFC) technical field, in particular to a kind of electrolyte for Solid Oxide Fuel Cell, especially, also relate to a kind of preparation method of this material.
Background technology
Electrolyte is the most crucial assembly of Solid Oxide Fuel Cell (SOFC), its performance (conductivity, stability, thermal expansion, densification temperature etc.) not only directly affects its working temperature and energy conversion efficiency, has also determined the required electrode material matching and the selection of corresponding technology of preparing thereof.At present, the operating temperature of general SOFC is too high, and (800～1000 ℃), this hot operation brings many problems, very harsh to the requirement of battery material.Intermediate temperature SOFC refers to that serviceability temperature, at the SOFC of 600～800 ℃, can reach the battery of the properties of SOFC under 800～1000 ℃ of conditions in this temperature range.Intermediate temperature SOFC has two advantages: 1) low to battery component corrosion rate; 2) connecting material of battery can be selected the metal that some prices are lower, thereby reduces costs.But also there are two problems in intermediate temperature SOFC: 1) anode and electrolyte, negative electrode and electrolytical interfacial resistance increase; 2) increased the impedance of Yttrium oxide doping zirconium oxide powder (YSZ) battery.The problem existing in order to solve intermediate temperature SOFC self, normal by reducing the thickness of YSZ layer, but the method is complicated, and technological process is long, and severe reaction conditions is unsuitable for industrial applicability.
Summary of the invention
The present invention aims to provide a kind of electrolyte for Solid Oxide Fuel Cell and preparation method thereof, to solve the low problem of conductivity under prior art YSZ cryogenic conditions.
To achieve these goals, according to an aspect of the present invention, a kind of electrolyte for Solid Oxide Fuel Cell is provided, scandium oxide, cerium oxide and zirconia, has consisted of, scandium oxide, cerium oxide and zirconia are 9～11: 1: 88～90 mixing in molar ratio.
Further, scandium oxide, cerium oxide and zirconia are 9～10: 1: 89～90 mixing in molar ratio.
Further, scandium oxide, cerium oxide and zirconia mol ratio are to mix at 9.5: 1: 85.
According to another aspect of the present invention, provide a kind of preparation method of the electrolyte for Solid Oxide Fuel Cell, comprised the following steps:
1) will be containing scandium raw material, containing cerium raw material and zirconium-containing material mixing;
2) add organic solvent and grinding agent to carry out ball milling;
3) after ball milling, remove organic solvent, obtain powder, powder is carried out to drying and roasting and obtain electrolyte;
Containing scandium raw material, containing cerium raw material and zirconium-containing material 9～11: 1: 88～90 mixing in molar ratio.
Further, scandium oxide, cerium oxide and zirconia are 9～10: 1: 89～90 mixing in molar ratio.
Further, scandium oxide, cerium oxide and zirconia mol ratio are 9.5: 1:: 85 mix.
Further, organic solvent adopts rotary evaporation method to remove, and rotary evaporation method condition is: bath temperature is 60～80 ℃, and material bottle rotary speed is 160～200r/min, and vacuum degree is 5～10Pa.
Further, roasting condition is: 650～860 ℃ of temperature, and roasting time is 4～6 hours, calcination atmosphere is oxygen or air.
Further, organic solvent is any one in ethanol, propyl alcohol, ether; Grinding agent is urea or polyacrylamide.
Technique effect of the present invention is:
Electrolyte provided by the invention is by doping scandium oxide and cerium oxide, suppress the cubic structure C process that the β of low conductivity changes mutually in opposite directions in zirconia, after making obtained electrolyte for the preparation of SOFC, conductivity at 780 ℃ and the YSZ conductivity at 1000 ℃ is suitable, thereby improved conductivity under fuel cell low temperature, improve energy conversion efficiency, reduced the cost of fuel cell.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to embodiment, the present invention is further detailed explanation.
Embodiment
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.Below in conjunction with embodiment, describe the present invention in detail.
The cubic structure c that the SOFC providing in the present invention can suppress high conductivity in ScSZ (scandium oxide-stabilizing zirconia) with the electrolyte in opposite directions β of low conductivity changes mutually, thereby makes this material also have at low temperatures good conductivity simultaneously.
Electrolyte for Solid Oxide Fuel Cell provided by the invention is that 9～11: 1: 88～90 mixing form by scandium oxide, cerium oxide and zirconia in molar ratio.
Pure ZrO
2very low 1000 ℃ of conductivity, only have 10
-7scm
-1, close to megohmite insulant.At ZrO
2in mix into some divalence or trivalent metal oxide (as Ce
2o
3, Sc
2o
3), low valence metal ion has occupied Zr
4+position, result only makes ZrO
2from room temperature to high temperature, (1000 ℃) can have stable phase structure (fluorite structure), and due to electric neutrality requirement, have produced a large amount of O in material
2-room, thereby increased ZrO
2ionic conductivity, make its high temperature (800～1000 ℃) conductivity reach 10
-2～10
-1more than Scm-1, expanded the partial pressure of oxygen scope of ionic conduction simultaneously.Current conventional Y
2o
3stablize ZrO
2(being called for short YSZ) is electrolyte, and its ionic conductivity, when partial pressure of oxygen changes tens number levels, significant change does not occur.
YSZ, when about 1000 ℃ work, has very high oxygen conduction.Yet in temperature is reduced to the scope of 600～800 ℃, its ionic conductivity obviously reduces, only have by improving manufacture craft, by the thickness reduction of dielectric substrate to micron dimension, thereby reduce its ohmic loss.But this complex manufacturing technology and cost are high.
The present invention adopts cerium oxide as phase stabiliser, with scandium oxide codope zirconia, the cubic structure C that contributes to suppress high conductivity in ScSZ (scandium oxide-stabilizing zirconia) the in opposite directions β of low conductivity changes mutually, thereby makes this material also have at low temperatures good conductivity simultaneously.Electrolyte provided by the invention is that 9～11: 1: 88～90 mixing form by scandium oxide, cerium oxide and zirconia in molar ratio, the electrolyte being mixed with in this ratio had both been realized scandium oxide and cerium oxide to zirconic codope, and the low-temperature ion conductivity and the stability that after annealed processing simultaneously, show are more excellent.When scandium oxide, cerium oxide and zirconic mixed proportion are not in above-mentioned scope, scandium oxide and cerium oxide are poor to zirconic doping effect, the transformation of crystalline phase in resulting materials can not be effectively suppressed, higher conductivity cannot be when temperature is low to moderate 600～800 ℃, kept.
Preferential oxidation scandium, cerium oxide and zirconia mol ratio are 9～10: after annealing in process, show the highest 600～800 ℃ of ionic conductivities and good stability at 1: 89～90 o'clock.Further preferred, scandium oxide, cerium oxide and zirconia mol ratio are that at 600～800 ℃ of 9.5: 1: 85 o'clock gained electrolytes, conductivity is optimum, and stability is also best.
Another aspect of the present invention also provides the preparation method for the electrolyte of Solid Oxide Fuel Cell, comprises the following steps:
1) will be containing scandium raw material, containing cerium raw material and zirconium-containing material mixing;
2) add organic solvent and grinding agent to carry out ball milling;
3) after ball milling, remove organic solvent, obtain powder, powder is carried out to drying and roasting and obtain electrolyte;
Containing scandium raw material, containing cerium raw material and zirconium-containing material, be 1: 2～11: 1～10 mixing in molar ratio.
Said herein can be nitrate, acetate and the sulfate of scandium/cerium/zirconium containing scandium/cerium/zirconium raw material.
After mixed material, principle is carried out to ball milling in molar ratio, add organic solvent that added principle is can be uniformly dispersed in mechanical milling process, it can be all kinds of conventional organic solvents that institute adds organic solvent, is preferably any one in ethanol, propyl alcohol, ether.Grinding agent can promote the mixing of mechanical milling process Raw to be preferably urea or polyacrylamide.The raw material mixing through ball milling embeds each other and is scattered in organic solvent, organic solvent need be removed, and can evaporate by routine, be dried means and remove, and is preferably Rotary Evaporators organic solvent is removed.Rotary evaporation condition is that bath temperature is 60～80 ℃, and material bottle rotary speed is 160～200r/min, and vacuum degree is 5～10Pa.By the evaporation of this condition, can fully reclaim the organic solvent in material after ball milling, the volatilization that reduces solvent is cost-saving.After removing organic solvent, obtain containing scandium/cerium/zirconium powder body, need the scandium/cerium/zirconium in powder be all converted into oxide by sintering.Before sintering, need a small amount of organic solvent residual in powder to be dried thoroughly, dry processing according to a conventional method, to remove a small amount of crystallization water wherein.After dry, powder is carried out to sintering, sintering condition is 650～860 ℃ of temperature, and roasting time is 4～6 hours, and calcination atmosphere is oxygen or air.Sintering, can guarantee that in powder, scandium/cerium/zirconium is all converted into oxide with this understanding.Containing scandium raw material, containing cerium raw material and zirconium-containing material, be 1: 2～11: 1～10 mixing in molar ratio, further also can be preferably by 1: 4～6: 3～5 and mix.
Embodiment
In following examples, each material used is commercially available and instrument and is commercially available.
Solid Oxide Fuel Cell preparation: Solid Oxide Fuel Cell (SOFC) is mainly comprised of electrolyte, anode, negative electrode and connector.SOFC anode adopts Ni-YSZ cermet, and negative electrode adopts the LSM (LaMnO of Sr doping
3), electrolyte adopts the electrolyte obtaining in embodiment and comparative example.During preparation, ScCeSZ compacting sintering is become to thick 1mm, the electrolyte sheet of diameter 25mm, a side surface that is coated in ScCeSZ electrolyte sheet after Ni-YSZ cermet (being material provided by the invention) is mixed with adhesive, at 1450 ℃, sintering is prepared anode for 4 hours; The opposite side surface that is coated in ScCeSZ electrolyte sheet after LSM and adhesive are mixed, then at 1200 ℃, sintering is prepared negative electrode for 4 hours, and anode, electrolyte, negative electrode have formed Ni-YSZ/ScCeSZ/LSM Solid Oxide Fuel Cell element.
The fuel cell component of having prepared is placed between the earthenware that two internal diameters are 20mm, between cell device and earthenware and between two earthenwares, with glass ring, seal, the end cap seal of a metal for the end of earthenware, the cylindrical space of cell device both sides has formed fuel chambers and oxidant chamber.Thin ceramic tubes is incorporated into electrode surface through end cap by gas, and reacted gas is discharged battery by the blast pipe on end cap between thickness earthenware.One end of fuel cell wire is bonded on electrode, and the other end is guided to outside battery by end cap, obtains having the SOFC of corresponding embodiment or comparative example gained electrolyte.
Specific area, primary particle size, conductivity and the aggregated particle size of step measurements gained electrolyte powder routinely.Primary particle size refers to that electrolyte has just prepared the particle diameter of rear mensuration.Aggregated particle size refers to gained electrolyte is stored to the particle diameter of mensuration again after 12 hours.The conductivity of electrolyte for to measure under normal temperature condition.Gained electrolyte in embodiment is made to open circuit voltage, the maximum power that SOFC measures respectively each SOFC at 650 ℃, 600 ℃ and 550 ℃ according to a conventional method.
Embodiment 1
After scandium nitrate, cerous nitrate and zirconyl nitrate are fully mixed by mole proportioning at 11: 1: 88, add ethanol and polyacrylamide to carry out ball milling, after ball milling, mixture is placed in and on Rotary Evaporators, revolves steaming, it is 65 ℃ that bath temperature is set, material bottle revolves speed for 160r/min, and the vacuum degree in Rotary Evaporators is 5Pa.After alcohol solvent is all evaporated to extracting, obtain powder, after powder is dry at 100 ℃, in air atmosphere, 650 ℃ of roastings obtain electrolyte 1 after 4 hours.
Embodiment 2
After scandium sulfate, cerous sulfate and zirconium sulfate are fully mixed by mole proportioning at 9: 1: 90, add ethanol and polyacrylamide to carry out ball milling, after ball milling, mixture is placed in and on Rotary Evaporators, revolves steaming, it is 65 ℃ that bath temperature is set, material bottle revolves speed for 160r/min, and the vacuum degree in Rotary Evaporators is 5Pa.After alcohol solvent is all evaporated to extracting, obtain powder, after powder is dry at 100 ℃, in air atmosphere, 650 ℃ of roastings obtain electrolyte 2 after 4 hours.
Embodiment 3
After acetic acid scandium, cerous acetate and acetic acid zirconium are fully mixed by mole proportioning at 10: 1: 89, add ethanol and polyacrylamide to carry out ball milling, after ball milling, mixture is placed in and on Rotary Evaporators, revolves steaming, it is 65 ℃ that bath temperature is set, material bottle revolves speed for 160r/min, and the vacuum degree in Rotary Evaporators is 5Pa.After alcohol solvent is all evaporated to extracting, obtain powder, after powder is dry at 100 ℃, in air atmosphere, 650 ℃ of roastings obtain electrolyte 3 after 4 hours.
Embodiment 4
After scandium nitrate, cerous nitrate and zirconyl nitrate are fully mixed by mole proportioning at 9.5: 1: 8.5, add ethanol and polyacrylamide to carry out ball milling, after ball milling, mixture is placed in and on Rotary Evaporators, revolves steaming, it is 65 ℃ that bath temperature is set, material bottle revolves speed for 160r/min, and the vacuum degree in Rotary Evaporators is 5Pa.After alcohol solvent is all evaporated to extracting, obtain powder, after powder is dry at 100 ℃, in air atmosphere, 650 ℃ of roastings obtain electrolyte 4 after 4 hours.
Embodiment 5
After scandium nitrate, cerous nitrate and zirconyl nitrate are fully mixed by mole proportioning at 10.5: 1: 88.6, add ethanol and polyacrylamide to carry out ball milling, after ball milling, mixture is placed in and on Rotary Evaporators, revolves steaming, it is 65 ℃ that bath temperature is set, material bottle revolves speed for 160r/min, and the vacuum degree in Rotary Evaporators is 5Pa.After alcohol solvent is all evaporated to extracting, obtain powder, after powder is dry at 100 ℃, in air atmosphere, 650 ℃ of roastings obtain electrolyte 5 after 4 hours.
Embodiment 6
After scandium nitrate, cerous nitrate and zirconyl nitrate are fully mixed by mole proportioning at 9.7: 1: 89.8, add ethanol and polyacrylamide to carry out ball milling, after ball milling, mixture is placed in and on Rotary Evaporators, revolves steaming, it is 65 ℃ that bath temperature is set, material bottle revolves speed for 160r/min, and the vacuum degree in Rotary Evaporators is 5Pa.After alcohol solvent is all evaporated to extracting, obtain powder, after powder is dry at 100 ℃, in air atmosphere, 650 ℃ of roastings obtain electrolyte 6 after 4 hours.
Embodiment 7
After scandium nitrate, cerous nitrate and zirconyl nitrate are fully mixed by mole proportioning at 9.4: 1: 89.2, add ethanol and polyacrylamide to carry out ball milling, after ball milling, mixture is placed in and on Rotary Evaporators, revolves steaming, it is 65 ℃ that bath temperature is set, material bottle revolves speed for 160r/min, and the vacuum degree in Rotary Evaporators is 5Pa.After alcohol solvent is all evaporated to extracting, obtain powder, after powder is dry at 100 ℃, in air atmosphere, 650 ℃ of roastings obtain electrolyte 7 after 4 hours.
Comparative example 1
Comparative example is pressed CN00112228.2 for the preparation of the electrolyte in SOFC, obtains electrolyte 8.
Comparative example 2
Be that with the difference of embodiment 1 scandium nitrate, cerous nitrate and zirconyl nitrate fully mix for 11: 1: 91 in molar ratio, obtain electrolyte 9.
Comparative example 3
Be that with the difference of embodiment 1 scandium nitrate, cerous nitrate and zirconyl nitrate fully mix by mole proportioning at 8: 1: 87, obtain electrolyte 10.
Comparative example 4
Be that with the difference of embodiment 1 scandium nitrate, cerous nitrate and zirconyl nitrate fully mix by mole proportioning at 8.9: 1: 90.1, obtain electrolyte 11.
Comparative example 5
Be that with the difference of embodiment 1 scandium nitrate, cerous nitrate and zirconyl nitrate fully mix by mole proportioning at 11.1: 1: 87.9, obtain electrolyte 12.
Gained electrolysis material 1～12 is measured to specific area, primary particle size, conductivity and the aggregated particle size of powder.The results are shown in Table 1.Gained electrolysis material 1～12 is made to SOFC1～12, measure open circuit voltage, maximum power, conductivity at 650 ℃, 600 ℃ and 550 ℃.The results are shown in Table 2.
The primary particle size of table 1 electrolysis material 1～12, specific area, conductivity and aggregated particle size result table
From table 1, in embodiment 4, gained electrolyte 4 primary particle sizes are 42nm, and aggregated particle size is 0.46um, due to primary particle size 50nm and the aggregated particle size 0.5um of arbitrary electrolyte in comparative example 1～5.In follow-up casting molding processes, add mobile performance performance and be improved, be easy to processing.And electrolyte provided by the invention is after storing, and is difficult for the follow-up use of impact of reuniting between particle.In embodiment 4, gained electrolyte 4 specific area SBET are 10.62m
2/ g, is better than the S of arbitrary electrolyte in comparative example 1～5
bET9.6m
2/ g.The high illustrative material inner void of specific area content is high, this electrolyte is made after SOFC, in use procedure, oxygen atom can enter the path of electrolyte inside to be increased, oxygen atom is improved in the migration velocity of electrolyte inside, thereby has improved conductivity and the power of gained battery.In embodiment 4, the conductivity of electrolyte 4 is 0.25S/cm, is better than the conductivity 0.2S/cm of arbitrary electrolyte in comparative example 1～5.The conductivity of electrolyte 4 provided by the invention is high, has overcome in prior art the low problem of electrolyte conductivity under low temperature.
Open circuit voltage, the maximum power result of table 2SOFC1～12 at 650 ℃, 600 ℃ and 550 ℃
From table 2, after in embodiment 4, gained electrolyte is made SOFC, open circuit voltage is respectively at 650 ℃, 600 ℃ and 550 ℃: 0.903V, 0.854V, 0.817V, be better than arbitrary SOFC in comparative example, and gained SOFC open circuit voltage in the time of 650 ℃ is higher, in SOFC use procedure, current density is large, can improve the power of gained SOFC under lower temperature conditions and make it have better result of use.
After in embodiment 4, gained electrolyte is made SOFC, maximum power is respectively at 650 ℃, 600 ℃ and 500 ℃: 1636Vcm
-2, 870Vcm
-2, 489mVcm
-2be better than arbitrary SOFC in comparative example, and gained SOFC maximum power in the time of 650 ℃ is higher, can improves the power of gained SOFC under lower temperature conditions and make it have better result of use.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. for an electrolyte for Solid Oxide Fuel Cell, it is characterized in that, scandium oxide, cerium oxide and zirconia, consist of, described scandium oxide, cerium oxide and zirconia are 9～11: 1: 88～90 mixing in molar ratio.
2. electrolyte according to claim 1, is characterized in that, described scandium oxide, cerium oxide and zirconia are 9～10: 1: 89～90 mixing in molar ratio.
3. electrolyte according to claim 2, is characterized in that, described scandium oxide, cerium oxide and zirconia mol ratio are to mix at 9.5: 1: 85.
4. for a preparation method for the electrolyte of Solid Oxide Fuel Cell, it is characterized in that, comprise the following steps:
1) will be containing scandium raw material, containing cerium raw material and zirconium-containing material mixing;
2) add organic solvent and grinding agent to carry out ball milling;
3) after ball milling, remove described organic solvent, obtain powder, described powder is carried out to drying and roasting and obtain described electrolyte;
Described containing scandium raw material, containing cerium raw material and zirconium-containing material 9～11: 1: 88～90 mixing in molar ratio.
5. method according to claim 4, is characterized in that, described scandium oxide, cerium oxide and zirconia are 9～10: 1: 89～90 mixing in molar ratio.
6. method according to claim 5, is characterized in that, described scandium oxide, cerium oxide and zirconia mol ratio are to mix at 9.5: 1: 85.
7. method according to claim 4, is characterized in that, described organic solvent adopts rotary evaporation method to remove, and described rotary evaporation method condition is: bath temperature is 60～80 ℃, and material bottle rotary speed is 160～200r/min, and vacuum degree is 5～10Pa.
8. method according to claim 7, is characterized in that, described roasting condition is: 650～860 ℃ of temperature, and roasting time is 4～6 hours, calcination atmosphere is oxygen or air.
9. method according to claim 8, is characterized in that, described organic solvent is any one in ethanol, propyl alcohol, ether; Described grinding agent is urea or polyacrylamide.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113773076A (en) * | 2021-09-26 | 2021-12-10 | 苏州正义新能源科技有限公司 | Fuel cell electrolyte membrane with low sintering temperature and preparation method thereof |
| TWI821794B (en) * | 2021-11-18 | 2023-11-11 | 芯量科技股份有限公司 | Manufacturing method for solid-state electrolyte powder |
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| EP1202370A1 (en) * | 2000-10-23 | 2002-05-02 | Toho Gas Co., Ltd. | Solid oxide fuel cell |
| CN1553538A (en) * | 2003-06-06 | 2004-12-08 | 中国科学院过程工程研究所 | Intermediate temperature solid oxide fuel battery material combing system |
| CN1794486A (en) * | 2005-12-26 | 2006-06-28 | 潮州三环（集团）股份有限公司 | Preparation method of solid oxide fuel battery electrolyte diaphram |
| CN101177301A (en) * | 2007-11-23 | 2008-05-14 | 中国科学院过程工程研究所 | Method for preparing stabilized zirconium oxide nano powder |
| CN101962168A (en) * | 2009-07-24 | 2011-02-02 | 中国矿业大学(北京) | Method for preparing nano powder material |
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2013
- 2013-12-19 CN CN201310703799.6A patent/CN103618101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1202370A1 (en) * | 2000-10-23 | 2002-05-02 | Toho Gas Co., Ltd. | Solid oxide fuel cell |
| CN1553538A (en) * | 2003-06-06 | 2004-12-08 | 中国科学院过程工程研究所 | Intermediate temperature solid oxide fuel battery material combing system |
| CN1794486A (en) * | 2005-12-26 | 2006-06-28 | 潮州三环（集团）股份有限公司 | Preparation method of solid oxide fuel battery electrolyte diaphram |
| CN101177301A (en) * | 2007-11-23 | 2008-05-14 | 中国科学院过程工程研究所 | Method for preparing stabilized zirconium oxide nano powder |
| CN101962168A (en) * | 2009-07-24 | 2011-02-02 | 中国矿业大学(北京) | Method for preparing nano powder material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113773076A (en) * | 2021-09-26 | 2021-12-10 | 苏州正义新能源科技有限公司 | Fuel cell electrolyte membrane with low sintering temperature and preparation method thereof |
| TWI821794B (en) * | 2021-11-18 | 2023-11-11 | 芯量科技股份有限公司 | Manufacturing method for solid-state electrolyte powder |
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