CN101034753A - Flat pole supporting solid oxide fuel battery - Google Patents
Flat pole supporting solid oxide fuel battery Download PDFInfo
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- CN101034753A CN101034753A CNA2006100388756A CN200610038875A CN101034753A CN 101034753 A CN101034753 A CN 101034753A CN A2006100388756 A CNA2006100388756 A CN A2006100388756A CN 200610038875 A CN200610038875 A CN 200610038875A CN 101034753 A CN101034753 A CN 101034753A
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Abstract
The invention relates to a plate type electrode strut solid oxide compound fuel cell, the characteristic is that in the cell strut body electrode interior distributes the electrode reaction gas channel, the collapse electrolyte layer and the non- strut body electrode in turn on the one side of the strut body electrode; distributes on non- strut body electrode has certain outburst platforms, the other side of strut body electrode has a collapse electric interlock material; or the non- strut body electrode is a plane, but under the other side of the strue body electrode collapse electric interlock layer distributes the certain outburst platforms; when composing cell heap, the outburst plane top of the single battery close contact the neighboring cell plane, realizes series connection between the cells, the remained space is used for non-strut body electrode response gas channel. The cell heap does not need other connection material part, easy seal, the high body power density; the cell size may greatly or small, easy satisfy the need to construct the different scale cell heap.
Description
Technical field:
The invention belongs to the fuel cell technology field, particularly flat pole supporting solid oxide fuel battery.
Background technology:
Solid Oxide Fuel Cell (SOFCs) claims ceramic membrane fuel cell (CMFCs) again, and its single-cell structure is porous cathode and porous anode therebetween one deck dense electrolyte.Present SOFCs monocell generally adopts electrode (male or female) to support and electrolyte thin membranization technology of preparing, and monocell has tubulose or plate two kinds.So-called electrode supporting, promptly the electrode as supporter needs certain thickness and mechanical strength, to bear the monocell necessary mechanical strength; And dense electrolyte layer and non-strut body electrode only need have and finish the needed thickness of its electrochemical function in battery.Publish by Dutch Ai Siweier (ELSEVIER) company, " high temperature solid oxide fuel cell---the basis that Xin Geer and Ken Deer (S.C.Singhal and K.Kendall) write, design and application " (" HighTemperatureSolid Oxide Fuel Cells---Fundamentals; Design and Applications ", 2003) point out in the book: plate SOFCs can adopt low relatively traditional ceramics preparation technology of cost and technology preparation, the body power density height of battery pile, volume is little, but the periphery of each monocell all needs strict sealing in the battery pile, and technical difficulty does not obtain fine solution greatly and as yet.Tubular SOFC s make sealing problem obtain solution because of the sealing position of its battery pile can move on to low-temperature space, but because the electrode utilance of tubular SOFC s is low, and the body power density of battery pile is little, volume is big, has limited the application of SOFCs.
The reason of existing plate SOFCs battery pile sealing difficulty is: when forming battery pile by monocell, all need a special link between per two monocells in the battery pile, this link not only will be connected in series two monocells, also to constitute two independently electrode reaction air chambers respectively simultaneously with two monocells, be the anode fuel air chamber on one side, be the cathode air chamber on one side, the periphery of each monocell all needs strict sealing like this; And the sealing position be in the high-temperature region, this has proposed great challenge to encapsulant and Sealing Technology.
Summary of the invention:
The present invention proposes a kind of flat pole supporting solid oxide fuel battery, the link of battery pile and the strut body electrode of monocell are merged, thereby when constituting battery pile, do not need special link, battery pile structure is simplified, and the problem of plate SOFCs battery pile sealing difficulty is resolved.
Flat pole supporting solid oxide fuel battery of the present invention constitutes monocell by porous supporting body electrode and the non-strut body electrode therebetween of porous one deck dense electrolyte, is composed in series battery pile by several monocells again; It is characterized in that:
Be distributed with reaction gas passage 2 in the porous supporting body electrode 1 of described monocell, its two ends are connected with gas outlet 4 with air inlet 3 respectively; On the face in 1 two faces of porous supporting body electrode, be coated with the non-strut body electrode layer 6 of dense electrolyte layer 5 and porous successively;
On the non-strut body electrode layer 6 of porous, be distributed with some projecting platforms 7, be coated with fine and close electric connection layer 8 on the another side of porous supporting body electrode 1; The surface of perhaps non-strut body electrode layer 6 is planes, be distributed with some projecting platforms 9 on another face of porous supporting body electrode 1, fine and close electric connection layer 8 is covered in the outer surface of projecting platform 9 and the remaining surface beyond porous supporting body electrode 1 this face projecting platform 9;
Fine and close electric connection layer 8 becomes to be tightly connected with the side of dense electrolyte layer 5 at porous supporting body electrode 1, and is contactless between non-strut body electrode layer 6 of porous and the fine and close electric connection layer 8;
Be composed in series battery pile by two or more above-mentioned monocells, in the adjacent single cells on the non-strut body electrode of a monocell end face of projecting platform 7 closely contact with fine and close electric connection layer 8 on another monocell strut body electrode; Perhaps strut body electrode 1 upper surface of the monocell surface of end face and the non-strut body electrode 6 of another monocell that is coated with the projecting platform 9 of fine and close electric connection layer 8 closely contacts; The reaction gas passage 10 that to stay two spaces between the monocell are non-strut body electrode layers 6.
The non-strut body electrode 6 of described porous supporting body electrode 1 and/or porous can be a single or multiple lift; Porous supporting body electrode 1 can be male or female; When anode during as porous supporting body electrode 1, the non-strut body electrode 6 of porous is a negative electrode; When negative electrode during as porous supporting body electrode 1, the non-strut body electrode 6 of porous is an anode.
The air inlet 3 at described porous supporting body electrode 1 internal electrode reaction gas passage 2 two ends can be concordant with the side of porous supporting body electrode 1 with gas outlet 4, also can one section air inlet pipe 11 arranged between air inlet 3 and the porous supporting body electrode 1, one section escape pipe 12 arranged between gas outlet 4 and porous supporting body electrode 1, the outer surface of this air inlet pipe 10 and escape pipe 11 is enclosed with one deck dense gas sealant 13, and it and monocell dense electrolyte layer 5 and fine and close electric connection layer 8 form and be tightly connected.
Described anode material comprises metal-electrolyte composite cermet, chromate-based composite oxides or titanate base composite oxidate, or one or both and electrolytical mixture in the above-mentioned composite oxides.
Described cathode material comprises lanthanum manganate base composite oxidate, ferrous acid lanthanum base composite oxidate or cobalt acid lanthanum base composite oxidate, or one or both and electrolytical mixture in the above-mentioned composite oxides.
Described electrolyte comprises zirconia base, ceria based, oxidation bismuthino, LaGaO 3 based, the sour barium base of cerium or strontium cerate composite oxides.
Described fine and close electric connection layer 10 can be made of single or multiple lift, and its material comprises chromate composite oxides, titanate composite oxides or lanthanum manganate base composite oxidate.
The material of described dense gas sealant 13 comprises the stable zirconia of yttrium (YSZ), alundum (Al, silicate glass or silicate ceramics.
Compare with existing plate SOFCs, electrode supporting flat-plate-type solid-oxide fuel battery of the present invention keep battery pile energy density height, volume little in, its outstanding advantage also comprises: 1) owing to the strut body electrode with monocell merges with the material pieces that is connected of battery pile, thereby when constituting battery pile, not needing special connection material part, battery pile structure is simplified; 2) because the reaction gas passage of monocell strut body electrode only has an air inlet 3 and gas outlet 4, when forming battery pile, air inlet 3 alignment, gas outlet 4 alignment with each monocell porous supporting body electrode 1 reaction gas passage 2, even between porous supporting body electrode 1 and air inlet 3 and gas outlet 4, do not have air inlet pipe 11 and escape pipe 12, also only need localized hyperthermia's sealing, and the periphery that does not need each monocell is all wanted strict sealing, so sealing difficulty reduces greatly; If between porous supporting body electrode 1 and air inlet 3 and gas outlet 4, one section air inlet pipe 11 and escape pipe 12 are arranged, can make the sealing of battery pile be moved to low-temperature space, seal and then more can realize easily, and have the outstanding advantage of tubular SOFC s " no sealing problem "; 3) because the strut body electrode of the monocell of plate SOFCs and battery pile be connected the material pieces merging, the thickness of strut body electrode increases, thereby the mechanical strength of monocell and deformation resistance are increased, so the size of monocell can be greatly, can be little, to satisfy the needs of forming the different scale cell heap.
Description of drawings:
Fig. 1 is distributed with the structural representation of the monocell of some projecting platforms on non-strut body electrode layer for the plate SOFCs of electrode supporting of the present invention;
Fig. 2 is the structural representation of plate SOFCs monocell strut body electrode inside " S " type gas passage;
Fig. 3 is the plate SOFCs of electrode supporting of the present invention is distributed with the monocell composition of some projecting platforms on non-strut body electrode layer a battery pile, the configuration structure schematic diagram of two adjacent single cells;
Fig. 4 is the structural representation of the inner branching type gas passage of plate SOFCs monocell strut body electrode;
Fig. 5 is the structural representation of the inner branch's gas passage of strut body electrode;
Fig. 6 is distributed with the structural representation of the monocell of some projecting platforms on a face of porous supporting body electrode for the plate SOFCs of electrode supporting of the present invention;
Fig. 7 is the plate SOFCs of electrode supporting of the present invention is distributed with the monocell composition of some projecting platforms on a face of strut body electrode a battery pile, the configuration structure schematic diagram of two adjacent single cells;
The distribution schematic diagram of the branching type gas passage of its strut body electrode inside when Fig. 8 is shaped as rhombus for plate SOFCs monocell a kind of.
Embodiment:
Embodiment 1:
The plate SOFCs monocell for preparing in the present embodiment is a rectangle, and it is of a size of: length * wide * thick=100 * 60 * 5.5 (mm); Accompanying drawing 1 has provided the plate SOFCs of a kind of electrode supporting of the present invention is evenly distributed with the monocell of projecting platform 7 on non-strut body electrode layer 6 structural representation.Arrow among the figure and symbol " " expression electrode reaction gas flow direction, symbol " " expression gas flow direction is to flow to outside the paper in paper.At porous Ni-YSZ (YSZ=Zr
0.84Y
0.16O
1.92, Ni volume content percentage is 50%) and on the face of supporter anode 1, be the about 30 microns non-supporter cathode layer 6 of porous LSM of about 40 microns compact YSZ dielectric substrate 5 of thickness and thickness successively; On cathode layer 6, be evenly distributed with several LSM projecting platforms 7, their end face and is parallel to the another side of Ni-YSZ supporter anode 1 in same plane.At the another side of supporter anode 1, the about 50 microns fine and close La of a layer thickness is arranged
0.75Ca
0.25CrO
3(LCC) electric connection layer 8; Electric connection layer 8 becomes air seal to be connected with compact YSZ dielectric substrate 5 in four sides of porous Ni-YSZ supporter anode 1, but between fine and close LCC electric connection layer 8 and the non-strut body electrode 6 of LSM without any being connected, the about 0.5mm of distance between both edges, in this zone, what come out is compact YSZ dielectric substrate 5.Equally distributed LSM projecting platform 7 above the non-supporter cathode layer 6 of LSM in the present embodiment, its cross section is trapezoidal, end face is a rectangle, be that LSM platform 7 is shaped as " mountain range ", the vertical long 100mm in mountain range is parallel to the long limit of rectangle Ni-YSZ supporter anode 1, the wide 1.5mm of last end face in mountain range, following bottom width 2mm, high 1.5mm, adjacent mountain range center distance 3mm." S " type gas passage that porous Ni-YSZ supporter anode 1 gas inside passage 2 connects and composes from beginning to end for several serpentine gas passages in the present embodiment, Fig. 2 have provided the structural representation of present embodiment plate SOFCs strut body electrode 1 inside " S " type gas passage 2.The cross section of " S " type gas passage 2 is circular, diameter 3mm, and the isolation spacing between the adjacency channel is 1mm; Be that the semi-circular channel of 4mm connects by radius of central line between the adjacent serpentine passage; The center line of each serpentine gas passage in same plane, this plane and compact YSZ dielectric substrate be 5 parallel, and compact YSZ dielectric substrate 5 between distance be 2mm; In the present embodiment, the air inlet pipe 11 between air inlet 3 and gas outlet 4 and the porous Ni-YSZ supporter anode 1 and the length of escape pipe 12 are 100mm; The diameter of inner pipe of air inlet pipe 11 and escape pipe 12 is 3mm, and overall dimension is: height * wide=5.5 * 5.5 (mm); The center line of air inlet pipe 11 and escape pipe 12 all with porous supporting body electrode 1 in the center line of " S " type gas passage 2 in same plane; Dense gas sealant 13 on the outer surface of air inlet pipe 11 and escape pipe 12, its material are YSZ, about 40 microns of thickness.
Adopt the porous Ni-YSZ supporter anode 1 of cast molding technology preparation in the present embodiment, its starting material is NiO (60%)+YSZ (40%), and the percentage in the bracket is mass percent.Concrete implementation step is as follows:
1, at first makes shape, size and " S " type gas passage and (comprise air inlet pipe 11, the internal channel of escape pipe 12) measure-alike polyvinyl chloride gas passage core rod, and cavity shape, size and Ni-YSZ supporter anode 1 corresponding to polytetrafluoroethylmaterial material profile mould; Core rod places in the profile mould, and core rod and profile mould constitute the mould of casting preparation Ni-YSZ supporter anode 1, and the last recording quantity of profile mould is as cast gate.
2, with the polyacrylic acid be dispersant, methylcellulose is an adhesive, and the powder water-based slurry of preparation quality percentage solid content about 40%, powder are (NiO+YSZ) mixture, and the mass percentage content of NiO is 60%.The dispersant addition is the 0.2-1% (mass percent) of water, and the adhesive addition is the 1-5% (mass percent) of water.
3, in the mould that the slurry implantation step 1 of preparation in the step 2 is prepared, and place in the vacuum chamber, the slurry in the mould is implemented the degassing handle; Thereafter, under room temperature and about 80% condition of relative humidity dry 3-5 days, treat supporter anode 1 in the mould be dried to have can carry out the needed intensity of subsequent treatment after, the demoulding; Supporter anode 1 after the demoulding under the condition of room temperature and relative humidity 60-90% dry 5-7 days; After the supporter anode 1 green compact drying, carry out contouring.
4, with ethanol be solvent, polyacrylic acid is a dispersant, the dispersant addition is the 0.2-1% (mass percent) of solvent in the suspended particulate slurry of the connection material LCC of preparation quality percentage solid content about 10% and the electrolyte YSZ powdery pulp of mass percent solid content about 8%, two kinds of slurries.Adopt slurry mechanically spraying method, on the face of porous NiO-YSZ supporter anode 1 green compact that preparation is finished in step 3, prepare the fine and close LCC electric connection layer 8 of thick 50-55 micron; After treating LCC film drying, prepare the YSZ dielectric substrate 5 of thick 30-35 micron at the another side of porous Ni-YSZ supporter anode 1, YSZ layer 5 becomes to be tightly connected with the side of LCC layer 8 at supporter; In preparation YSZ dielectric substrate, about 40 microns air inlet pipe 11, the escape pipe 12 lip-deep YSZ air seal layers 13 of preparation thickness, it is tightly connected for 8 one-tenth with the LCC electric connection layer with YSZ dielectric substrate 5; After the green compact film drying to be prepared, they together with NiO-YSZ supporter anode 1 green compact, were burnt 5-10 hour altogether at 1200 ℃; In the process of high-temperature roasting, stay in the polyvinyl chloride core rod of anode support 1 inside and remove, the inner pipe passway of reaction gas passage 2 in the formation NiO-YSZ anode support 1 and air inlet pipe 11, escape pipe 12 burned.
5, spray skim LCC fine particle (granularity d=0.01-0.10 micron) powdery pulp again on the surface of LCC film, spray skim YSZ fine particle (granularity d=0.01-0.10 micron) powdery pulp again on the surface of YSZ dielectric substrate 5 and gas sealant 13 films, two kinds of solid content of slurry and dispersant addition are identical with step 4; After to be dried, 1400 ℃ were burnt 10-20 hour altogether, obtained fine and close LCC electric connection layer 8, compact YSZ dielectric substrate 5 and compact YSZ air seal layer 13.
6, adopt screen printing technique,, prepare the green layer of the non-supporter cathode layer 6 of the about 30 microns porous LSM of a bed thickness on the surface of compact YSZ dielectric substrate 5, between the non-supporter cathode layer 6 of fine and close LCC electric connection layer 8 and LSM apart from 1mm; The employed LSM slurry of silk screen printing consists of: the decentralized medium of the mass percentage content of LSM about 20%, 80% is methylcellulose and terpinol mixture (wherein the mass percent of methylcellulose is 4-7%), evenly mixes; After treating the non-supporter cathode layer 6 green layer dryings of LSM, adopt die casting technology, the slurry that moulding LSM projecting platform 7, mold casting forming LSM projecting platform 7 use on LSM cathode layer green compact is the LSM water-based slurry, wherein the mass percentage content of LSM powder is 30%, the mass percentage content of polyacrylic acid dispersant is 0.4% of a water, the mass percentage content of methyl cellulose binder is 3% of a water, and mechanical agitation is mixed the back and implemented the vacuum degassing processing.After treating LSM projecting platform 7 dryings, with the non-supporter cathode layer 6 of LSM, LSM projecting platform 7 and each ceramic layer of having prepared before this together, 1200 ℃ were burnt 2-5 hour more altogether.At last LSM projecting platform 7 is carried out shaping, the end face that makes each platform is in same plane, and is and parallel with the fine and close LCC electric connection layer 8 of NiO-YSZ anode support 1 another side.
As above, finished the preparation of monocell, ((voidage of the porous Ni-YSZ supporter anode 1 of NiO → Ni) obtain is about 42% in NiO (60%)+YSZ (40%) supporter anode 1 reduction back; About 38 microns of the thickness of compact YSZ dielectric substrate 5 and gas sealant 13; About 29 microns of the thickness of the non-supporter cathode layer 6 of porous LSM, voidage about 36%; About 50 microns of the thickness of fine and close LCC electric connection layer 8; Apart from 0.5mm, what both exposed between the edge is YSZ dense film 5 between fine and close LCC electric connection layer 8 and the non-supporter cathode layer 6 of LSM; Distance between fine and close LCC electric connection layer 8 and the non-supporter cathode layer of LSM 6 edges, convenient as long as guarantee not electrically contact between the two for preparation manipulation, can select at 0.2-3mm.
The monocell that several are measure-alike is stacked successively, and in each monocell Ni-YSZ supporter anode 1 align in air inlet 3 alignment, the gas outlet 4 of gas passage 2, is composed in series the battery pile reactor core.Accompanying drawing 3 has provided the configuration of two adjacent single cells in the battery pile reactor core and the reaction gas passage 10 of the non-supporter negative electrode of LSM that between constitutes; The end face of the LSM projecting platform 7 above the non-supporter cathode layer 6 of the LSM of a monocell in two adjacent single cells closely contacts with fine and close LCC electric connection layer 8 on 1 one faces of Ni-YSZ supporter anode of another monocell, realize that two monocells are connected in series, staying between the two, the space is the reaction gas passage 10 of the non-supporter negative electrode 6 of one of them monocell LSM.The battery pile topmost negative electrode of a monocell closely contacts with the anodal collector plate 14 of battery pile, and the Ni-YSZ supporter anode of the bottom monocell of battery pile closely contacts with battery pile negative pole collector plate 15; Symbol " " among the figure and arrow are represented electrode reaction gas flow direction, and the flow direction of reacting gas (air or oxygen) in path 10 of the non-supporter negative electrode of symbol " " expression LSM is for to flow to outside the paper in paper.The battery pile reactor core places in the battery pile anchor clamps; The battery pile anchor clamps have three zones, that is: central battery heap work high-temperature region, and outer low-temperature space is temperature gradient zone or battery pile thermal insulation areas between high-temperature region and the low-temperature space; The reactor core part of battery pile is in the high-temperature region, and air inlet pipe 11 and escape pipe 12 pass thermal insulation areas, and air inlet 3 and gas distributing chamber, gas outlet 4 are tightly connected at low-temperature space with the tail gas collection chamber; The gas distributing chamber of the non-supporter negative electrode 6 of LSM and tail gas collection chamber are in the high-temperature region, in the both sides of the battery pile reactor core corresponding with the direction of the non-supporter cathode reaction gas of LSM path 10; The gas introduction tube of the non-supporter negative electrode of LSM gas distributing chamber and the gas eduction tube of cathode exhaust gas collection chamber pass thermal insulation layer, are connected with battery pile outside corresponding pipeline.
When the above-mentioned battery pile of startup is worked, at first battery pile is heated to working temperature, for example 750 ℃ by external heat or other mode of heating.Then, the fuel gas (as hydrogen) of porous Ni-YSZ supporter anode 1 is fed the gas distributing chamber of fuel, fuel gas enters the air inlet 3 of each monocell from gas distributing chamber, by air inlet pipe 11, enter Ni-YSZ supporter anode 1 gas inside passage 2, in the process of porous Ni-YSZ supporter anode 1 internal gas passage 2, fuel gas is by micropore anode reaction zone (near the anode anode and the electrolyte interface) diffusion of supporter anode 1, and generation oxidation reaction (H at fuel gas stream
2→ 2H
++ 2e '); The electron stream that reaction generates is by between the Ni-YSZ supporter anode 1 internal gas passage 2, and the anode material that is electrically connected material layer 8 one side near fine and close LCC, be electrically connected material layer 8 by fine and close LCC, enter the fine and close top that is electrically connected projecting platform 7 on the material layer 8 tight non-supporter negative electrodes 6 of LSM that contact, arrive the non-supporter negative electrode 6 of LSM by projecting platform 7 with LCC; The reacting gas of the non-supporter negative electrode 6 of LSM, air or oxygen enters the gas distributing chamber that is positioned at high-temperature region battery pile reactor core one side from the outside of battery pile through gas pipeline, enters the reaction gas passage 10 of the non-supporter 6 of each monocell porous LSM of battery pile then; By in the process of gas passage 10, oxygen combines with the electronics of coming from anode at the surface and the bore area of the non-supporter 6 of porous LSM at air or oxygen, and concurrent surviving former answered (O
2+ 4e ' → 2O
2-), the O of generation
2-By the interface of the non-supporter 6 of LSM with the compact YSZ electrolyte 5 of oxide ion conduction, enter the compact YSZ dielectric substrate 5 of oxide ion conduction, reach the electrode reaction district of Ni-YSZ supporter anode 1 then; Here, O
2-With reaction product of anode 2H
+In conjunction with generating water (O
2-+ 2H
+→ H
2O); The water that is gaseous state under the high temperature diffuses into gas passage 2 by the micropore of porous Ni-YSZ supporter anode 1, and the fuel gas eluting gas passage 2 with remnants enters collection chamber through escape pipe 12, gets rid of from collection chamber at last.Reaction residual gas in the reaction gas passage 10 of the non-supporter 6 of LSM enters the collection chamber of the non-supporter negative electrode that is positioned at high-temperature region battery pile reactor core opposite side, discharges by escape pipe then.In the inside of battery pile reactor core, between each monocell, the flow direction of electronics is the negative electrode from the anode of a monocell to adjacent single cells; At the be connected in series monocell at the battery pile reactor core two ends formed of monocell, wherein the electronics of an end monocell anode flows to the negative electrode of other end monocell by external circuit.Like this, battery pile reactor core and external circuit are formed an electric loop.
The above-mentioned monocell and the battery pile that prepare in the present embodiment, compare with existing plate SOFCs: 1) do not need special battery pile link, simple in structure; 2) sealing station of battery pile is at low-temperature space, with existing tubular SOFC s the same simple, sealing is reliable.3) volumetric power density of battery pile and existing plate SOFCs's is the same high, about 1.5kW/ liter.
The cross section of the reaction gas passage 2 in the present embodiment in the Ni-YSZ supporter anode 1 is circular, but also can be oval or square; The inner passage section area of gas passage 2 is relevant with the factors such as length of the size of monocell, gas passage 2, can be at 1-1000mm
2Select in the scope.
Isolation spacing in the present embodiment between the porous Ni-YSZ anode support 1 interior adjacent serpentine passage is 1mm, the diameter of circular gas passage 2 is 3mm, and the energising cross section between Ni-YSZ supporter anode 1 above and below is about 25% of supporter anode aerea total; Ohmic loss when passing through porous supporting body electrode 1 for reducing electric current, the energising cross section between porous supporting body electrode 1 above and below is that the 15-85% of porous supporting body electrode 1 area is advisable.For improving the utilance of porous supporting body electrode 1, the reacting gas that makes porous supporting body electrode 1 is by reaction gas passage 2 time, have enough gas can be diffused near the reaction zone of dielectric substrate 5 all strut body electrode 1, the isolation spacing 0.1-3mm between gas passage 2 adjacency channels is advisable.
In the present embodiment, distance is 2mm between the center line of the circular gas passage 2 of diameter 3mm and the compact YSZ dielectric substrate 5, i.e. interval 0.5mm between the tube wall of gas passage 2 and the compact YSZ dielectric substrate 5; For reduce electrode reaction gas in the gas passage 2 near the compact YSZ dielectric substrate diffusion length or the diffusional resistance in the electrode reaction district of strut body electrode 1, the tube wall of the gas passage 2 in the porous supporting body electrode 1 and the spacing distance 0.1-3mm between the dense electrolyte layer 5 are advisable.
The thickness of the non-supporter cathode layer 6 of porous LSM is 30 microns in the present embodiment, and the scope of the thickness of non-strut body electrode layer 6 can be selected at the 10-150 micron.
In the present embodiment on the non-supporter cathode layer 6 of porous LSM LSM projecting platform 7 be Chang Ling shape, last end face width 1.5mm, bottom width 2mm under the rectangle, adjacent mountain range center distance 3mm; The shape of the outstanding platform 7 above the non-strut body electrode layer 6 of porous can be other random geometry; But, for improving the utilance of non-strut body electrode 6, the reacting gas that makes non-strut body electrode is by reaction gas passage 10 time, there is enough gas can be diffused near dielectric substrate 5 all electrode reaction zones, gas is advisable less than 2mm from the beeline of projecting platform 7 export-oriented its base surface area center diffusions, and this diffusion length is 1mm in the present embodiment; For making electric current flow into adjacent single cells from a monocell smoothly by projecting platform 7, the 15-85% that the contact area between the end face of projecting platform 7 and the electric connection layer 8 accounts for non-supporter cathode layer 6 areas of porous LSM is advisable, and is 50% in the present embodiment; Equally, when being distributed with projecting platform 9 on the face that adopts porous supporting body electrode 1, the 15-85% that the end face of projecting platform 9 and non-strut body electrode layer 6 area account for porous supporting body electrode 1 area is advisable.
In the present embodiment on the non-supporter cathode layer 6 of porous LSM the height of LSM projecting platform 7 be 1.5mm.According to the size of monocell and the flow process of non-strut body electrode 6 reacting gass, platform 7 height can be selected at 0.2-20mm.
The thickness of compact YSZ dielectric substrate 5 is 40 microns in the present embodiment, and according to the character of operating temperature, useful life and the electrolyte of battery, the thickness of dense electrolyte layer 5 can be selected in the 5-200 micrometer range.
The thickness of fine and close LCC electric connection layer 8 is 50 microns in the present embodiment, and the thickness of fine and close electric connection layer 8 can be selected in the 5-200 micrometer range.
The thickness of porous Ni-YSZ supporter anode 1 is 5.5mm in the present embodiment, and according to the size and the requirement of mechanical strength of monocell, the thickness of porous supporting body electrode 1 can be selected in the 2-100mm scope.
About 40 microns of compact YSZ air seal layer 13 thickness in the present embodiment on the outer surface of air inlet pipe 11 and escape pipe 12.According to the character of operating temperature, useful life and gas sealant 13 materials of battery, the thickness of dense gas sealant 13 can be selected in the 5-200 micrometer range.
Embodiment 2:
In the present embodiment rectangular flat plate type SOFCs monocell its be of a size of: length * wide * thick=1000 * 200 * 7 (mm).
The non-strut body electrode layer 6 of the porous supporting body electrode 1 of the plate SOFCs monocell of the present invention and porous can be an individual layer, also can be multilayer, with the performance that improves electrode or improve electrode and dielectric substrate between the physical chemistry matching.For example: the porous Ni-YSZ supporter anode 1 among the embodiment 1, its material (volume) consist of Ni (50%)+YSZ (50%), and voidage is about 42%; Also can between itself and compact YSZ dielectric substrate 5, add the several layers that material and micro-structural change in gradient again.For example add two-layerly, one deck of adjacent Ni (50%)+YSZ (50%) is the Ni (30%) of 10 microns of thickness, voidage 30%+YSZ (70%), is Ni (the 10%)+YSZ (90%) of 5 microns of thickness, voidage 15% by one deck of dielectric substrate 5; Or between Ni (50%)+YSZ (50%) and compact YSZ dielectric substrate 5, add the CeO of 5 microns of layer thicknesses, voidage 15%
2Or DCO layer.Equally, between non-supporter cathode layer 6 of the porous LSM of 29 microns of the thickness in embodiment 1, voidage 36% and the compact YSZ dielectric substrate 5, add two-layer again: one deck is 10 microns, LSM (the 50%)+YSZ (50%) (volume composition) of voidage 20%, is 5 microns, LSM (the 20%)+YSZ (80%) (volume composition) of voidage 10% by one deck of compact YSZ dielectric substrate 5; For multi-layered electrode, outermost layer is referred to as the current collection layer of this electrode usually, and near the remainder layer of dielectric substrate 5, then system is referred to as the electrode transition zone, or is the electrode function layer.
In the present embodiment, strut body electrode 1 and non-strut body electrode 6 all have an electrode transition zone.
Fine and close electric connection layer 8 also is to be made of the two-layer of different materials in the present embodiment, with volume consist of Ni (50%)+YSZ (50%) porous supporting body anode 1 direct neighbor be the Sr of one deck densification
0.86Y
0.08TiO
3(SYT), skin is fine and close LCC.
The end face of the non-strut body electrode layer 6 of the monocell in the present embodiment is a plane, and on a face of porous supporting body electrode 1 equally distributed projecting platform 9 is arranged.
Fig. 6 has provided the plate SOFCs of present embodiment is evenly distributed with the monocell of outstanding platform 9 on a face of Ni-YSZ supporter anode 1 structural section schematic diagram.Consist of at volume on the face of porous supporting body anode 1 of Ni (50%)+YSZ (50%), be coated with the about 15 microns Ce of thickness successively
0.8Sm
0.2O
2(SDC) transition zone of supporter anode 1, thick about 40 microns compact YSZ dielectric substrate 5, the transition zone of the non-supporter cathode layer 6 of the about 10 microns LSM of thickness (50%)+YSZ (50%) (volume composition) is the current collection layer of the non-supporter cathode layer 6 of the about 30 microns porous LSM of thickness at last; On another face of porous Ni (50%)+YSZ (50%) supporter anode 1, be evenly distributed with some material volumes and form the projecting platform 9 that is similarly Ni (50%)+YSZ (50%), its end face is a rectangle, be that projecting platform 9 is trapezoidal " mountain range " for cross section, the longitudinal length in mountain range is 1000mm, the wide 1.5mm of the end face in mountain range, following bottom width 2mm, high 2mm, adjacent mountain range center distance is 4mm, the long limit that is parallel to supporter anode 1 in mountain range; The fine and close electric connection layer 8 that covers on other face outside this face projecting platform 9 of end face, side and the strut body electrode 1 in mountain range is made of two-layer, at first is the about 20 microns fine and close SYT of a layer thickness, is the about 30 microns fine and close LCC of thickness then; Two-layer (SYT and LCC) of fine and close electric connection layer 8 all becomes air seal to be connected with compact YSZ dielectric substrate 5 in the side of porous Ni-YSZ supporter anode 1, SYT-LCC composite compact electric connection layer 8 and the non-supporter cathode layer 6 of LSM, between both edges apart from 0.5mm.Electrode reaction gas (fuel gas) passage 2 of the inside of the Ni-YSZ anode support 1 in the present embodiment is a branching type, and the air inlet pipe 11 between air inlet 3 and gas outlet 4 and the supporter anode 1 and the length of escape pipe 12 are 150mm.Fig. 4 has provided the structure and the distribution of the branching type gas passage 2 of supporter anode 1 inside, some cross sections are branch's gas passage circular, diameter 4mm, their center lines on same plane, be parallel to each other, be uniformly distributed between isocon and the collecting main, the center distance 5mm of contiguous branch passage, the distance of each branch plane, gas passage center line place and dielectric substrate 5 is 2.5mm; Fig. 5 has provided the cross section structure schematic diagram of strut body electrode 1 inner branch's gas passage; The interior breather line of air inlet pipe 11 is coaxial with the isocon of gas passage 2, and the breather line cross section is all rectangle mutually: height * wide=4 * 18 (mm), and the long limit of rectangle all is parallel to compact YSZ dielectric substrate 5 place faces; The exterior cross-section of air inlet pipe 11 is a rectangle: 7 * 20 (mm), and long limit also is parallel to compact YSZ dielectric substrate 5 place faces; The collecting main of gas passage 2 and identical with structure, size and the isocon of the corresponding escape pipe 12 of collecting main and air inlet pipe 11, just position and isocon and air inlet pipe 11 is relative.In addition, the reacting gas of strut body electrode 1 enters the position of first branched bottom and gas enters collecting main from last branched bottom outflow position from the isocon of gas passage 2, with respect to evenly the distribute regional center at place of each branch's gas passage, become symmetry, so that gas equates through the flow process that different branched bottoms arrive gas outlet 4 from air inlet 3; Surface coverage at air inlet pipe 11 and escape pipe 12 has the about 50 microns compact YSZ air seal layer 13 of a layer thickness, and it is connected with fine and close electric connection layer 8 air seals with compact YSZ dielectric substrate 5.
Technology that the present embodiment employing is pushed and casting combines is made porous Ni-YSZ anode support, comprises air inlet pipe 11 and escape pipe 12.Concrete implementation step is as follows:
1, the extrusion moulding pug that at first prepares NiO (60%)+YSZ (40%) (mass ratio).The moisture 10-20% of pug, starch 2-10%, methylcellulose (MC800) 5-10%, tung oil 3-6%, all the other are NiO+YSZ, are mass percent.With the interlude of plastic extruding machine extrusion modling strut body electrode 1, that is: the outstanding mountain range shape platform 9 on each the branch's gas passage in the body and the face.When extrusion moulding, the base substrate of extruding continuously is cut into about 1000mm length or 1000mm multiple length.
2, after the supporter drying of extrusion modling has the needed intensity of subsequent preparation step, shaping.
3, employing is similar to the mold casting forming technology that embodiment 1 is adopted, at the two ends of the prepared green compact body of step 2, and the isocon of cast molding gas passage 2, collecting main, and air inlet pipe 11 and escape pipe 12.Behind the body drying of cast molding anode support partly, carry out contouring once more.
4, the step 4 in the reference example 1, preparation respectively: the connection material SYT suspended particulate ethanol based slurry of mass percent solid content about 10%, solid content about 10% connects the suspended particulate slurry of material LCC, the suspended particulate slurry of the dielectric substrate YSZ of solid content about 8%, the anode transition zone SDC slurry of solid content about 8%.At first, adopt slurry mechanically spraying technology, (platform is arranged and do not have all faces of platform) in step 3 on the one side that outstanding mountain range is arranged of supporter anode 1 green compact finished of preparation, the SYT electric connection layer for preparing thick 20-25 micron earlier, after treating SYT film drying, the thick about 30 microns LCC electric connection layer of spraying preparation again, treat LCC layer drying after, at the about 15 microns SDC anode transition zone of another side (plane) preparation one bed thickness of anode support 1; After the drying, the YSZ dielectric substrate 5 of the thick 30-40 micron of preparation on the anode transition zone, YSZ layer 5 is connected in the side of supporter with the two-layer compound electric connection layer 8 that is made of SYT layer and LCC layer; In preparation YSZ dielectric substrate 5, preparation air inlet pipe 11 and the thick about 50 microns YSZ air seal layer 13 of escape pipe 12 outer surfaces, YSZ air seal layer 13 is connected with YSZ layer 5, SYT-LCC densification electric connection layer 8; After the green layer drying for the treatment of to have prepared, together with NiO-YSZ anode support 1 green compact, 1200 ℃ were burnt 5-10 hour altogether with each layer of having prepared.
5, on semi-sintering LCC layer 8 surface, spray skim LCC fine particle (granularity d=0.01-0.10 micron) powdery pulp again, on the surface of YSZ dielectric substrate 5, the surface of YSZ air seal layer 13 sprays skim YSZ fine particle (granularity d=0.01-0.10 micron) powdery pulp again; After to be dried, 1400 ℃ were burnt 10-20 hour altogether at this, obtained fine and close (SYT+LCC) electric connection layer 8, fine and close YSZ dielectric substrate 5 and fine and close YSZ air seal layer 13 at last; YSZ layer 5 be tightly connected in four sides of supporter by the fine and close electric connection layer 8 of SYT-LCC; YSZ air seal layer 13 is tightly connected with YSZ layer 5, SYT-LCC densification electric connection layer 8.
6, the step 4 in the same reference example 1, the negative electrode transition zone LSM (50%) of preparation quality percentage solid content about 10%+YSZ (50%) (volume ratio) suspended particulate ethanol slurry, then on the surface of the prepared compact YSZ dielectric substrate 8 of step 5, adopt the mechanically spraying technology to prepare thick about 10 microns LSM (50%)+YSZ (50%) negative electrode transition zone, after the drying, 1250 ℃ sintering 2-5 hour; Then, adopt screen printing technique,, prepare the current collection layer green compact of the thick about 30 microns non-supporter negative electrode 6 of porous LSM on the surface of negative electrode transition zone, again 1200 ℃ sintering 2-5 hour; Distance between the non-supporter negative electrode 6 of porous LSM (comprising its transition zone) edge and fine and close electric connection layer 8 edges is 0.5mm; The employed LSM slurry of silk screen printing consists of: the decentralized medium of the mass percentage content of LSM about 20%, 80% is methylcellulose and terpinol mixture (wherein the mass percent of methylcellulose is 4-7%), evenly mixes.
7, check at last whether to have between the non-supporter negative electrode 6 of LSM (comprising the negative electrode transition zone) and the fine and close electric connection layer 8 and be connected, can not have or not any electrical connection between the two.
After finishing the preparation of above-mentioned monocell, some monocells are stacked successively, the composition battery pile is connected in series.Accompanying drawing 7 has provided the battery pile of being made up of the flat pole support SOFCs monocell of the present invention of projecting platform 9 by on a face on the strut body electrode, the reaction gas passage 10 of the non-supporter negative electrode 6 of LSM that the configuration of two adjacent single cells and between constitute.The end face of outstanding platform 9 closely contacts on the non-supporter negative electrode 6 of LSM of a monocell in two adjacent single cells and another monocell strut body electrode 1, realizes the series connection of two adjacent single cells.Arrow and symbol " " expression gas flow direction among the figure.The flow direction of reacting gas in passage of the non-strut body electrode 6 of " " expression LSM is for to flow to outside the paper in paper.
The startup and the course of work of battery pile are similar to Example 1.
The above-mentioned monocell for preparing from present embodiment is of a size of: 1000 * 200 (mm), can compare with the size of tubular SOFC s.In fact, the size of patent SOFCs monocell of the present invention can also do more.The 1 prepared monocell and the battery pile of composition in conjunction with the embodiments, as can be seen: the battery pile that adopts the monocell of patent preparation of the present invention to form, remove battery pile power density height, volume is little; Do not need special link, designs simplification; Sealing problem is easy to outside the advantages such as solution; Owing to be connected the material pieces merging with the strut body electrode of the monocell of plate SOFCs and battery pile in the patent of the present invention, the thickness of strut body electrode increases, thereby the deformation resistance of the mechanical strength of monocell and preparation process strengthens, so the size of the monocell of preparation can be greatly, can be little, can satisfy and set up the needs that different scale cell is piled.And existing plate SOFCs monocell, monocell full-size generally can only reach 200 * 200 (mm).In addition, have the performance of monocell of electrode transition zone or the volumetric power density of battery pile to improve a lot, with comparing of embodiment 1, the body power density of present embodiment battery pile has improved about 0.2kW/ liter.
Embodiment 3:
In the foregoing description 1 and 2, porous supporting body electrode 1 is square, and the outstanding platform 9 on a projecting platform 7 on the non-strut body electrode 6 or a face at porous supporting body electrode 1 is platforms of single shape.The plate SOFCs of the present invention, the projecting platform on same electrode, the projecting platform 9 on 1 one faces of projecting platform 7 on the non-strut body electrode 6 or porous supporting body electrode, the platform shape also can be different.
In the present embodiment, preparation strut body electrode 1 is of a size of for LSM negative electrode, the monocell that is shaped as rhombus: the interior acute angle of rhombus is 70 °, bottom side length 200mm, and high 100mm, thickness 5.5mm is approximately the size of LSM cathode support body electrode 1; Monocell in the present embodiment is evenly distributed with outstanding platform 9 on a face of rhombus LSM cathode support body electrode 1, its shape has two kinds: a kind of is the mountain range shape, and a kind of is circular, the projecting platform 9 alternate even distributions of two kinds of shapes; The cross section in mountain range is the last bottom width 1.5mm in isosceles trapezoid mountain range, following bottom width 2mm, and high 2mm, the center distance between neighbour and the mountain range is 40mm; Circular platform be uniformly distributed in the mountain range between, the end face diameter 1.5mm of circular platform, the diameter 2mm that goes to the bottom, high 2mm, the centre distance 3mm between the circular platform, mountain range and nearest circular platform spacing 3mm; On other face outside this face projecting platform of end face, side and the LSM strut body electrode negative electrode 1 of mountain range and circular platform, the about 50 microns fine and close LCC electric connection layer 8 of a layer thickness is arranged.The cross section structure of present embodiment monocell and shown in Figure 6 similar; On a face of porous LSM cathode support body electrode 1, be coated with the about 20 microns LSM of thickness (50%)+YSZ (50%) negative electrode transition zone successively, thick about 15 microns compact YSZ dielectric substrate 5, the non-supporter anode of thick about 20 microns SDC transition zone, and the about 30 microns non-supporter anode layer 6 of porous Ni-YSZ (the volume content ratio of Ni is %) of thickness; Compact YSZ dielectric substrate 5 is connected material layer 8 and becomes air seal to connect in the side of porous LSM cathode support body electrode 1 with LCC; The mountain range of giving prominence on 1 one faces of LSM strut body electrode negative electrode and the end face of circular platform 9 are in same plane, and this face is parallel to the surface of the non-supporter anode 6 of Ni-YSZ.
Fig. 8 has provided the plate SOFCs of the present invention, the structural representation of rhombus cathode support body electrode 1 inner equally distributed gas passage 2.Gas passage 2 is a branching type, and isocon and collecting main are positioned at strut body electrode 1 inside of 1 two opposite side of rhombus LSM supporter negative electrode, and correspondence position has length to be air inlet pipe 11 and the escape pipe 12 of 100mm respectively; The reacting gas (air or oxygen) of LSM supporter negative electrode 1 enters from air inlet 3, and through air inlet pipe 11, isocon flows into each lateral, enters collecting main again, through escape pipe 12, and 4 outflows from the gas outlet at last; The cross section of branch's gas passage of even between the isocon of gas passage 2 and the collecting main, parallel distribution is circular, diameter 3mm, the centre distance 3.6mm of contiguous branch gas passage; The center line of each branch's gas passage is in same plane, and the distance of this plane and dielectric substrate 5 is 2.5mm; Air inlet 3, air inlet pipe 11 and isocon are coaxial, and plane, axis place and each branch's gas passage is identical; The interior tube section of air inlet pipe 11 and shunt conduit is a rectangle: height * wide=3 * 8 (mm), the cross-sectional shape rectangle of air inlet pipe 11: height * wide=5.5 * 10 (mm), the long limit of rectangle 3 * 8 (mm) and 5.5 * 10 (mm) all is parallel to plane, compact YSZ dielectric substrate 5 place; The cross section structure size of gas outlet 4, escape pipe 12 and collecting main is identical with air inlet 3, air inlet pipe 11 and isocon, in relative position.Outer surface at air inlet pipe 11 and escape pipe 12 has the about 30 microns compact YSZ air seal layers 13 of a layer thickness, and it is connected with 8 one-tenth air seals of fine and close LCC electric connection layer on dense electrolyte layer 5 and 1 one faces of cathode support body electrode; Present embodiment adopts gel cast molding technology, preparation porous LSM cathode support body electrode 1.Concrete implementation step is as follows:
1, at first make the core rod of the measure-alike polyvinyl chloride of the interior branching type gas passage of shape and LSM cathode support body, comprise air inlet pipe 11 and escape pipe 12, and the profile mould of polytetrafluoroethylmaterial material cathode support body; Core rod places in the profile mould, and core rod and profile mould are combined into structure, size in the structure and the consistent size of LSM cathode support body to be prepared.The top of profile mould opens wide, as casting gate.
2, with the polymerization organic monomer N of concentration about 18%, the mixed solution (mass ratio of MBAM and AM is about 1: 5) of N '-di-2-ethylhexylphosphine oxide third rare acid amides (MBAM) and third rare acid amides (AM) is a solvent, add and be about 5 ‰ polyacrylic acid (PAA) dispersant, ball milling prepares LSM gel casting slurry, LSM mass percent solid content about 50%.Add about 2 ‰ ammonium persulfate ((NH then
4)
2S
2O
8) cross-linked evocating agent, ball milling mixed about 20 minutes again.
3, in the mould prepared of LSM slurry implantation step 1 with preparation in the step 2, after the vacuum degassing, 80 ℃ of heat cross-linking curing reactions 4 hours.Behind the slurry curing, obtain the green compact of LSM cathode support body electrode 1 behind the demoulding in the mould, it simultaneously is the plane, and another side has mountain range and the outstanding platform 9 of truncated cone-shaped.
4, prepared LSM supporter negative electrode 1 green compact of step 3 are carried out contouring.Step 4 in the reference example 1, the LSM (50%) of preparation quality percentage solid content about 10%+YSZ (50%) (volume ratio) negative electrode transition zone ethanol slurry, the mechanically spraying technology, in the flat one side of LSM cathode support body electrode 1 green compact, prepare the electrode transition zone of thick about 20 microns LSM+YSZ cathode support body electrode 1.Then, with LSM cathode support body electrode 1 and negative electrode transition zone together 1200 ℃ burnt altogether 2-5 hour, around here, stay in the burning of LSM cathode support body electrode 1 gas inside channel forming core rod and remove, form the electrode reaction gas passage 2 of cathode support body electrode 1, comprise the interior pipe of air inlet pipe 11 and escape pipe 12.
5, adopt organo-metallic compound source chemical vapor deposition (MOCVD) technology, beta-diketon metallorganic with metallic element among the LCC is a starting material, under 800 ℃ of conditions, on end face, side and this face of outstanding mountain range on 1 one faces of LSM cathode support body electrode and round platform has other face outside the outstanding platform 9, prepare the about 30 microns fine and close LCC electric connection layer 8 of a bed thickness; Beta-diketon metallorganic with metallic element among the YSZ is a starting material, under 900 ℃ of conditions, the about 15 microns YSZ dense electrolyte layer 5 of preparation one bed thickness on LSM+YSZ negative electrode transition zone prepares the about 30 microns compact YSZ air seal layer 13 of a layer thickness in air inlet pipe 11 and escape pipe 12 outer surfaces simultaneously; Subsequently, be predecessor with the acetate of metallic element among the SDC, adopt the auxiliary aerosol technology of preparing of static, at the SDC anode transition zone of the about 20 microns non-supporter anodes 6 of surface preparation one bed thickness of compact YSZ dielectric substrate 5, underlayer temperature is 500 ℃.At last, with each ceramic layer of the monocell that prepared, annealing is 2-10 hour under 900 ℃ of conditions.
6, adopt screen printing technique, on the anode transition zone, prepare non-supporter anode layer 6 current collection layers of the about 30 microns porous Ni-YSZ of a bed thickness; The initial powder of the non-supporter anode layer 6 of Ni-YSZ is that quality group becomes NiO (60%)+YSZ (40%); The slurry that silk screen printing is used consists of: the mass percentage content of NiO (60%)+YSZ (40%) mixture is about 20%, and all the other evenly mix for containing the terpinol decentralized medium of 4-7% (quality) methylcellulose; Distance between fine and close LCC electric connection layer 8 edges and the non-supporter anode layer 6 of Ni-YSZ (the comprising the SDC transition zone) edge is 0.5mm.
The monocell for preparing in the present embodiment, employing be LSM cathode support design.The battery pile of being made up of the monocell for preparing in the present embodiment, 800 ℃, the volume energy density during the hydrogen fuel operation is 2.1 kilowatts of every liters, and cold-hot circulation 7 times, does not occur any owing to sealing problem causes stack performance decline phenomenon.
Claims (8)
1, a kind of flat pole supporting solid oxide fuel battery constitutes monocell by porous supporting body electrode and the non-strut body electrode therebetween of porous one deck dense electrolyte, is composed in series battery pile by several monocells again; It is characterized in that:
Be distributed with reaction gas passage (2) in the porous supporting body electrode (1) of described monocell, its two ends are connected with gas outlet (4) with air inlet (3) respectively; On the face in (1) two face of porous supporting body electrode, be coated with the non-strut body electrode layer of dense electrolyte layer (5) and porous (6) successively;
On the non-strut body electrode layer of porous (6), be distributed with some projecting platforms (7), be coated with fine and close electric connection layer (8) on the another side of porous supporting body electrode (1); The surface of perhaps non-strut body electrode layer (6) is a plane, be distributed with some projecting platforms (9) on another face of porous supporting body electrode (1), fine and close electric connection layer (8) is covered in outer surface and this face projecting platform (9) of porous supporting body electrode (1) remaining surface in addition of projecting platform (9);
Fine and close electric connection layer (8) becomes to be tightly connected with the side of dense electrolyte layer (5) at porous supporting body electrode (1), and is contactless between non-strut body electrode layer of porous (6) and the fine and close electric connection layer (8);
Be composed in series battery pile by two or more above-mentioned monocells, in the adjacent single cells on the non-strut body electrode of a monocell the fine and close electric connection layer (8) on face of the end face of projecting platform (7) and another monocell strut body electrode closely contact; Perhaps the surface coverage on the strut body electrode of a monocell (1) has the end face of the projecting platform (9) of fine and close electric connection layer (8) closely to contact with the surface of the non-strut body electrode of another monocell (6); Staying two spaces between the monocell is reaction gas passage (10) of non-strut body electrode layer (6).
2, flat pole supporting solid oxide fuel battery as claimed in claim 1 is characterised in that described porous supporting body electrode and/or the non-strut body electrode of porous are single or multiple lift; When anode during as the porous supporting body electrode, the non-strut body electrode of porous is a negative electrode; When negative electrode during as the porous supporting body electrode, the non-strut body electrode of porous is an anode.
3, flat pole supporting solid oxide fuel battery as claimed in claim 1, being characterised in that has one section air inlet pipe (11), between gas outlet (4) and porous supporting body electrode (1) one section escape pipe (12) is arranged between described air inlet (3) and the porous supporting body electrode (1), the outer surface of this air inlet pipe (10) and escape pipe (11) is enclosed with one deck dense gas sealant (13), and it and monocell dense electrolyte layer (5) and fine and close electric connection layer (8) form and be tightly connected.
4, flat pole supporting solid oxide fuel battery as claimed in claim 1, be characterised in that described anode material comprises metal-electrolyte composite cermet, chromate-based composite oxides or titanate base composite oxidate, or one or both and electrolytical mixture in the above-mentioned composite oxides.
5, flat pole supporting solid oxide fuel battery as claimed in claim 1, be characterised in that described cathode material comprises lanthanum manganate base composite oxidate, ferrous acid lanthanum base composite oxidate or cobalt acid lanthanum base composite oxidate, or one or both and electrolytical mixture in the above-mentioned composite oxides.
6, flat pole supporting solid oxide fuel battery as claimed in claim 1 is characterised in that described electrolyte comprises zirconia base, ceria based, oxidation bismuthino, LaGaO 3 based, the sour barium base of cerium or strontium cerate composite oxides.
7, flat pole supporting solid oxide fuel battery as claimed in claim 1, be characterised in that described fine and close electric connection layer is made of single or multiple lift, its material comprises chromate composite oxides, titanate composite oxides or lanthanum manganate base composite oxidate.
8, flat pole supporting solid oxide fuel battery as claimed in claim 1 is characterised in that the material of described dense gas sealant (13) comprises the stable zirconia of yttrium (YSZ), alundum (Al, silicate glass or silicate ceramics.
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