WO1992004496A1 - Method of producing porous lithium aluminate fiber and coarse particle - Google Patents
Method of producing porous lithium aluminate fiber and coarse particle Download PDFInfo
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- WO1992004496A1 WO1992004496A1 PCT/JP1990/001137 JP9001137W WO9204496A1 WO 1992004496 A1 WO1992004496 A1 WO 1992004496A1 JP 9001137 W JP9001137 W JP 9001137W WO 9204496 A1 WO9204496 A1 WO 9204496A1
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- lithium aluminate
- coarse particles
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- porous
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/043—Lithium aluminates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0048—Fibrous materials
- C04B20/0056—Hollow or porous fibres
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62227—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres
- C04B35/62231—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products obtaining fibres based on oxide ceramics
- C04B35/62236—Fibres based on aluminium oxide
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
- C04B38/0025—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors starting from inorganic materials only, e.g. metal foam; Lanxide type products
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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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
- H01M8/02—Details
- H01M8/0289—Means for holding the electrolyte
- H01M8/0295—Matrices for immobilising electrolyte melts
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/14—Pore volume
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00844—Uses not provided for elsewhere in C04B2111/00 for electronic applications
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention is used as a reinforcing material for an electrolyte plate of a molten carbonate type fuel cell in which a molten carbonate is impregnated as an electrolyte among fuel cells used in an energy sector which directly converts chemical energy of a fuel into electric energy.
- a molten carbonate is impregnated as an electrolyte among fuel cells used in an energy sector which directly converts chemical energy of a fuel into electric energy.
- an electrolyte plate in which molten carbonate as an electrolyte is impregnated into a porous matrix tape is made, and this electrolyte plate is used as a power source ( An oxygen electrode) and an anode (fuel electrode) are sandwiched from both sides, and oxidizing gas is supplied to the power source side and fuel gas is supplied to the anode side to generate power between the power source and the anode.
- An oxygen electrode and an anode (fuel electrode) are sandwiched from both sides, and oxidizing gas is supplied to the power source side and fuel gas is supplied to the anode side to generate power between the power source and the anode.
- Each cell is made into one cell, and each cell is laminated in multiple layers via a separator to form a stack, and these studs are closed with an improper tightening force.
- Electrolyte plates used in the molten carbonate fuel cell have been conventionally manufactured by various methods.
- One of the manufacturing methods is to use ceramic particles of several meters or less, for example, lithium aluminate (L i AJ? 0 2 )
- the electrolyte plate obtained by such a method is used for convenience while being sandwiched between both electrodes of a power source and an anode.
- the oxidizing gas supplied to the power source side and the fuel gas supplied to the anode side are completely used. Must be separated, but the electrolyte plate
- the fuel cell is started and stopped, it is subjected to large stress due to repeated thermal operation between room temperature and the operating temperature of the fuel cell (about 650).
- the maximum stress at this time is when the fuel cell is shut off. Occurs when the electrolyte moves from the liquid phase to the solid phase. The volume changes rapidly with this phase change and releases energy, which is released by causing cracks in the electrolyte plate.
- the electrolyte plate can no longer maintain the ability to separate the oxidizing gas and the fuel gas, and the oxidizing gas and the fuel gas come into direct contact, reducing the battery output. Or, there is a problem of danger of explosion.
- Japanese Patent Laid-Open Publication No. 57-27569 Japanese Patent Laid-Open Publication No. 57-27569
- Matrigs are formed by entanglement of the lithium aluminate filaments comprising the above, and the electrolyte is held in the voids formed by entanglement of the long fibers of the lithium aluminate ( Japanese Patent Publication No. 63-2651 1), etc. have been proposed.
- carbonate as an electrolyte cannot be contained in coarse particles or long fibers of lithium aluminate, and solidification of the carbonate when the fuel cell is cooled from the operating temperature to room temperature.
- a series of gaps are formed at the interface between the coarse particles and the long fibers and the carbonate, and the gaps may be poor on both the front and back surfaces.
- the present inventors have proposed that if a carbonate as an electrolyte can be impregnated into coarse particles or long fibers of lithium aluminate when manufacturing an electrolyte plate for a fuel cell, the carbonate may be used during cooling of the fuel cell.
- the particles become solid, those contained in the coarse particles or long fibers become solid and form a series with the surrounding carbonate, and a series of gaps are formed around the coarse particles and long fibers.
- the lithium aluminate coarse particles or fibers were porous, and as a result of repeated research, they found that the lithium aluminate fibers and particles themselves were porous.
- the present invention has been made by finding a method of making the same.
- the present invention relates to a method for manufacturing an electrolyte plate of a molten carbonate fuel cell, wherein the reinforcing material comprises coarse particles or fibers of lithium aluminate.
- the aim is to provide a method for producing aluminate fibers and the particles themselves.
- the present invention provides a method for converting a high-purity polycrystalline alumina fiber into Li by heating it in a compound containing Li at a temperature in the range of 500 to 1000 ° C.
- a step of impregnating the lithium aluminate fiber with an acidic solution is used. Is preferably provided.
- porous lithium aluminum It is preferable to remove the carbonate remaining in the fiber by subjecting the mineral fiber to a decarboxylation treatment by washing with water and pickling.
- the alumina fiber undergoes a Li-forming reaction, recrystallization occurs in the fiber and pores are formed in the fiber itself.
- the carbonate as an electrolyte enters the pores and becomes solid when the fuel cell is cooled. Since the carbonate solidified inside and the carbonate around the fiber are continuous, a series of gaps are not formed around the fiber.
- a small number of silica particles and a large number of alumina particles are combined to form coarse particles, and then the coarse particles are heated to 500 to 1000 ° C. in a carbonate containing lithium ions, The silicide particles in the coarse particles are eluted into the carbonate, and the coarse particles of the alumina particles having pores formed by the elution of the silica particles are lithiated into lithium aluminate coarse particles. Thereafter, the lithium aluminate coarse particles are formed. After cooling the particles, the particles are washed with water and pickled to obtain porous lithium aluminate coarse particles.
- One coarse particle is produced by enclosing a small number of silica particles with many alumina particles, and the silica particles are eluted from the coarse particles to form pores.
- the pore diameter can be changed arbitrarily.
- the carbonate as an electrolyte enters the pores and becomes solid as it is when the fuel cell is cooled.
- the continuous carbonate and the carbonate around the reinforcement are continuous, so that a series of gaps are not formed around the reinforcement.
- FIG. 1 is a schematic diagram showing an example of a manufacturing process for carrying out the manufacturing method of the present invention
- FIG. 2 is a diagram showing a state when a lithium aluminate fiber manufactured by the manufacturing method of the present invention is used as an electrolyte plate reinforcing material.
- FIG. 3 is a schematic view showing an example
- FIG. 3 to FIG. 6 are photographs showing cross sections of lithium aluminate fibers obtained as a result of experiments under various conditions
- FIG. 8 is a schematic view of coarse particles of porous lithium aluminate produced by the production method of the present invention
- FIG. 9 is coarse particles of porous lithium aluminate produced by the production method of the present invention.
- FIG. 3 is a schematic view showing a state when is used as a reinforcing material for an electrolyte plate.
- FIG. 1 shows one example of a process when carrying out the process of the present invention, 1 the alumina (A JJ 2 0 3) to be in the ⁇ shape by arranging a large number and S i 0 2 such impurities
- a supply unit for supplying high-purity polycrystalline alumina fiber 2 not containing 3 a supply unit 3 for a compound 4 containing Li, and a lithium unit 5 for lithiating alumina fiber 2 in a compound 4 containing Li.
- 6 is a decarboxylation treatment section that is employed as necessary
- 7 is a porous lithium aluminate fiber as a product.
- the compound containing S i 0 2, etc. Works i from the compound feed section 3 to the high purity alumina fiber 2 made of polycrystalline containing no impurity was removed from the test ⁇ 1 including L i of 4 Mix in. It is a compound containing 4 L i, For example other, L i 2 C 0 3, L i OH, but the L i 2 0, CH 3 COOL i and these have -system free compounds, L i 2 C Those containing 0 3 are the best.
- the mixing ratio of the alumina fiber and the compound containing Li is theoretically sufficient if AJ? And Li are equimolar. However, considering the reactivity, the compound containing Li is 1 to A! The excess of L i of about 100 times is made to exist.
- the alumina fiber 2 is lithiated in the lithiation reaction section 5 in a state of being mixed into the compound 4 containing Li to obtain a lithium aluminate fiber.
- the alumina fiber 2 was mixed with the compound 4 containing Li.
- a lithiation reaction is carried out by heating at 500 to 100 (heating at TC for about 5 to 100 hours) to produce fibers having pores on the inside and on the surface.
- the carbonate is solid (powder) at room temperature, but becomes almost liquid at the time of reaction, and the heating temperature in the lithiation reaction is 500 ° C to 100 (TC).
- the lithium aluminate fiber 7 obtained by the lithiation reaction was converted to a more pure lithium fiber.
- it is washed with water and acid in the decarbonate treatment section 6 to remove the carbonate remaining in the fiber, but remains in the fiber.
- the initial carbonate component is set in consideration of the carbonate composition, it is not particularly necessary, so the manufacturing process may be omitted.
- the acid solution impregnation time can be arbitrarily adjusted depending on the washing effect and the surface treatment effect. When the washing is carried out using a carbonate, an acetic acid or sulfuric acid-based solution or a mixed solution containing these is preferable.
- the production method may include a step of impregnating the porous lithium aluminate fiber in an acidic solution.
- a decrease in fiber strength due to the lithium fiber becoming porous due to lithiation of alumina fiber 2 can be prevented by heating at a temperature of 1000 ° C. or more after the above-described treatment. The strength can be restored to about 1/3.
- the porous lithium aluminate fiber 7 produced by the method described above is used as a reinforcing material for an electrolyte plate constituting a fuel cell.
- the support particles are produced according to the present invention as shown in part in FIG.
- the matrix 8 of the electrolyte plate is formed by mixing the porous lithium aluminate fiber 7 thus obtained, and the matrix 8 is impregnated with a molten carbonate 9 as an electrolyte.
- One step example shows a 1 1 silica (S i 0 2) 1 1 supply portion of a case Figure 7 is carrying out the porous manufacturing method of Lithium-aluminate coarse particles of the present invention, 1 2 alumina (AJ? 2 0 3) 1 2 a supply of, 1 3 dispersant
- Reference numeral 17 denotes a granulation processing unit (granulator), and reference numeral 18 denotes coarse particles 17a granulated to a predetermined particle size in a granulation processing unit 17 in carbonate 19a containing lithium ions.
- the silica 11a in the coarse particles 17a is eluted into the carbonate 19a from the coarse particles 17a, and the remaining alumina 12a is lithiated.
- Carbonate supply unit containing ions 20 is a cooling unit, 21 is a decarbonate treatment unit that removes carbonate remaining in coarse particles by washing with water and pickling, 22 is a porous product Lithium aluminate coarse particles.
- Reference numeral 23 denotes a high-temperature heating section used as necessary to increase the strength of the porous lithium aluminate coarse particles 22.
- Reference numeral 23a denotes a strong lithium aluminate obtained in the high-temperature heating section 23. Coarse particles.
- porous lithium aluminate coarse particles of the present invention are produced according to the above-mentioned production step ′.
- a number of alumina ( ⁇ ⁇ ⁇ 2 0 3) 1 to 2 a was dispersed with a dispersant 1 3 a, said multiple of alumina 1 2 a and a few silica (S i 0 2) coupling the 1 1 a Agent (for example, polyvinyl alcohol) 14a is mixed in a mixing section 15 to form a slurry 16, and the slurry 16 is put in a granulation section 17 where a large number of Coarse particles 17a in the form of a small amount of silica 11a mixed with alumina 12a particles are produced.
- the particle diameter is 1 to 10 m.
- the particle size is about 0.01 to 10 m, but 0.01 to 1 is preferable from the viewpoint that the arbitrary coarse particle size is easily adjusted and the particle shape tends to be spherical.
- the coarse particles 17a granulated by the granulation processing section 7 have a particle diameter of 0.5 to 20G111.
- the 0.5 to 20 coarse particles 17a produced above are heated to a temperature of about 500 to 1000 in a carbonate 19a containing lithium ions in a lithiation treatment section 18, A small amount of silica 11a in coarse particles 17a is dissolved in carbonate 19a to form pores 24 in coarse particles 1a as shown in FIG. 8 and remaining coarse particles
- the coarse particles composed of alumina 12a as a constituent were lithiated, and the coarse particles 17a were cooled with lithium aluminate coarse particles 17a, followed by washing with water and pickling in the decarbonate treatment section 21.
- porous lithium aluminate coarse particles 22 having pores 24 are obtained.
- the carbonate 19a containing lithium ions is usually a solid (powder) at room temperature and liquefied by raising the temperature, but a liquefied carbonate from the beginning is used. May be.
- the temperature rise during lithiation was 500 to 100 (TC was set at 500 ° C or lower, the reaction itself was very slow, and at 100 ° C or higher, coarse particles 17b after reaction or alumina
- TC was set at 500 ° C or lower, the reaction itself was very slow, and at 100 ° C or higher, coarse particles 17b after reaction or alumina
- the above temperature range is optimal because the sintering of 1 2a itself progresses and the coarse particle diameter decreases, and the pores 24 formed in the lithium aluminate coarse particles 17 b collapse.
- forced cooling flow of gas or the like
- slow cooling furnace cooling
- the coarse particles 17a were heated in a carbonate containing lithium ions to 500 to 100 (the temperature was raised to TC and the silica 11a was removed from the coarse particles 17a in the lithiation treatment section 18). Is eluted to make it porous and lithiated to obtain lithium aluminate coarse particles 17b, which are cooled and then decarbonated to obtain porous lithium aluminate coarse particles 22 as a product.
- the water-washing and pickling steps in the decarbonate treatment section for performing the above-described decarbonate treatment can be performed by setting the initial carbonate component in consideration of the carbonate composition contained in a part of the coarse particles.
- the manufacturing process may be omitted, but it is a necessary process other than the above, and the surface treatment of the particles (including the surface and the pore surface) can be performed. By incorporating this process, It is possible to remove the carbonate remaining inside the luminescent coarse particles.
- a specific method for performing the above-mentioned decarbonation treatment is as follows. First, coarse particles are washed with warm water, then neutralized with acetic acid or the like, and then impregnated with an aqueous solution of drunk acid (arbitrary time, arbitrary composition ), Then wash with alcohol, and finally dry.
- porous lithium aluminate coarse particles 22 obtained in the above-described production process have a large diameter, in order to increase the strength, the high-temperature heating section 23 shown in FIG. Solidify by heat treatment up to above, strong porous lithium Pum aluminate coarse particles 23a should be obtained.
- the porous lithium aluminate coarse particles 22 or 23a produced by the above-described method are used as a reinforcing material for an electrolyte plate for refining a fuel cell.
- a large number of voids produced according to the present invention are formed in the support particles.
- the matrix 25 a of the electrolyte ⁇ 25 is formed by mixing the porous lithium / reminate coarse particles 22 or 23 a having pores 24, and the molten carbonate 26 as an electrolyte is formed in the matrix 25 a.
- the molten carbonate 26 When impregnated, the molten carbonate 26 enters the pores 24 of the porous lithium aluminate coarse particles 22 or 23a as a reinforcing material, so that the fuel cell goes from the operating temperature (650) to room temperature.
- the molten carbonate 26 When the molten carbonate 26 is solidified by cooling, the molten carbonate 26 that has entered the pores 24 remains as it is and becomes solid, and the molten carbonate around the coarse particles 22 or 23a is formed. It could be a series with salt 26. As a result, a series of gaps are not formed around the coarse particles 22 or 23a, and even if the cracks 27 generated from both sides of the electrolyte plate 25 reach the coarse particles 22 or 23a. However, this crack 27 does not penetrate.
- the lithium aluminate fiber or coarse particles according to the present invention is used as a reinforcing material for an electrolyte plate of a molten carbonate fuel cell, that is, the aluminate fibers or coarse particles of the present invention are reinforced into a matrix of ceramic particles. It is mixed as a material to form an electrolyte holding plate with many voids, and the molten carbonate is impregnated into the electrolyte retaining plate. A series of gaps are not formed, and a good electrolyte plate without cracks can be obtained.
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- Chemical Kinetics & Catalysis (AREA)
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Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP1090754A JPH02271911A (ja) | 1989-04-12 | 1989-04-12 | 多孔質リチウムアルミネート繊維の製造方法 |
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WO1992004496A1 true WO1992004496A1 (en) | 1992-03-19 |
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PCT/JP1990/001137 WO1992004496A1 (en) | 1989-04-12 | 1990-09-05 | Method of producing porous lithium aluminate fiber and coarse particle |
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EP (1) | EP0499639A4 (ja) |
JP (1) | JPH02271911A (ja) |
WO (1) | WO1992004496A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6037076A (en) * | 1995-10-03 | 2000-03-14 | Kabushiki Kaisha Toshiba | Molten carbonate fuel cell and method of manufacturing retaining material for electrolyte body of molten carbonate fuel cell |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5340515A (en) * | 1992-08-10 | 1994-08-23 | Fmc Corporation | Polycrystalline γ-lithium aluminate fibers and process of manufacture |
DE19852783B4 (de) * | 1998-11-16 | 2006-04-13 | MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. | Kristalline poröse Festkörper |
CN104911665B (zh) * | 2015-04-14 | 2017-06-06 | 东北大学 | 铝酸锂多孔模板及其制备方法 |
Citations (8)
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JPS4828938A (ja) * | 1971-08-18 | 1973-04-17 | ||
JPS5248600A (en) * | 1975-08-20 | 1977-04-18 | Inst Gas Technology | Low pressure process for producing betaalithium aluminate |
JPS55149179A (en) * | 1979-05-08 | 1980-11-20 | Denki Kagaku Kogyo Kk | Manufacture of alumina fiber formed body and its device |
JPS58128670A (ja) * | 1982-01-26 | 1983-08-01 | Hitachi Ltd | 溶融塩型燃料電池及びその製造方法 |
JPS58129775A (ja) * | 1982-01-29 | 1983-08-02 | Hitachi Ltd | 燃料電池 |
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JPS6326511B2 (ja) * | 1981-05-20 | 1988-05-30 | Hitachi Ltd | |
JPS63151615A (ja) * | 1986-12-15 | 1988-06-24 | Kyushu Refract Co Ltd | リチウムアルミネ−ト繊維の製造方法 |
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DE2711420A1 (de) * | 1977-03-16 | 1978-09-21 | Degussa | Verfahren zur herstellung von beta-lithiumaluminat |
US4201760A (en) * | 1979-02-02 | 1980-05-06 | General Electric Company | Molten salt synthesis of lithium meta-aluminate powder |
JPS6065719A (ja) * | 1983-09-20 | 1985-04-15 | Fuji Electric Corp Res & Dev Ltd | リチウムアルミネ−ト粉末の製造方法 |
-
1989
- 1989-04-12 JP JP1090754A patent/JPH02271911A/ja active Pending
-
1990
- 1990-09-05 WO PCT/JP1990/001137 patent/WO1992004496A1/ja not_active Application Discontinuation
- 1990-09-05 EP EP19900913257 patent/EP0499639A4/en not_active Ceased
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4828938A (ja) * | 1971-08-18 | 1973-04-17 | ||
JPS5248600A (en) * | 1975-08-20 | 1977-04-18 | Inst Gas Technology | Low pressure process for producing betaalithium aluminate |
JPS55149179A (en) * | 1979-05-08 | 1980-11-20 | Denki Kagaku Kogyo Kk | Manufacture of alumina fiber formed body and its device |
JPS6326511B2 (ja) * | 1981-05-20 | 1988-05-30 | Hitachi Ltd | |
JPS58128670A (ja) * | 1982-01-26 | 1983-08-01 | Hitachi Ltd | 溶融塩型燃料電池及びその製造方法 |
JPS58129775A (ja) * | 1982-01-29 | 1983-08-02 | Hitachi Ltd | 燃料電池 |
JPS58129777A (ja) * | 1982-01-29 | 1983-08-02 | Hitachi Ltd | 燃料電池 |
JPS63151615A (ja) * | 1986-12-15 | 1988-06-24 | Kyushu Refract Co Ltd | リチウムアルミネ−ト繊維の製造方法 |
Non-Patent Citations (2)
Title |
---|
"Novel Cell" Vol. 2, edited by Shiro Yoshizawa, 17, 18 10 September 1979 (10. 09. 79), The Publishing Office of Tokyo Denki University, p. 213-216. * |
See also references of EP0499639A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6037076A (en) * | 1995-10-03 | 2000-03-14 | Kabushiki Kaisha Toshiba | Molten carbonate fuel cell and method of manufacturing retaining material for electrolyte body of molten carbonate fuel cell |
Also Published As
Publication number | Publication date |
---|---|
EP0499639A4 (en) | 1993-05-26 |
JPH02271911A (ja) | 1990-11-06 |
EP0499639A1 (en) | 1992-08-26 |
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