CN101969129A - Batch production method of membrane electrode and manufacturing mould therefor - Google Patents
Batch production method of membrane electrode and manufacturing mould therefor Download PDFInfo
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Abstract
The invention provides a batch production method of a membrane electrode, which can carry out batch production. The batch production method is characterized by comprising the following steps: (1) preparing an anode gas diffusion layer and a cathode gas diffusion layer which are of the same area; (2) coating a catalytic layer to form an anode gas diffusion electrode and a cathode gas diffusion electrode; (3) clipping the anode gas diffusion electrode and the cathode gas diffusion electrode into small pieces of gas diffusion electrodes of the same dimension and quantity; (4) respectively placing the small pieces of anode gas diffusion electrodes and the small pieces of cathode gas diffusion electrodes in upper ledge openings and lower ledge openings of a hot-pressing mould frame and tiling a proton exchange membrane between the upper edges and the lower edges; (5) placing the whole hot-pressing mould into a hot press to prepare a conjoined membrane electrode structure; and (6) separating the conjoined membrane electrode structure from the middle position of the proton exchange membrane of an adjacent single membrane electrode.
Description
Technical field
The present invention relates to the production technical field of membrane electrode, be specially a kind of batch manufacturing method of membrane electrode.
Background technology
Film electrode structure comprises five parts: middle solid-state proton exchange membrane, anode catalyst layer and cathode catalysis layer and the outermost anode gas diffusion layer and the cathode gas diffusion layer of proton exchange membrane both sides, that is, Catalytic Layer always places between proton exchange membrane and the homonymy gas diffusion layers.
Based on the said structure of membrane electrode, its preparation method generally has two kinds:
First kind is the technology of coated catalysts hot repressing on film: promptly earlier at the both sides of a slice proton exchange membrane difference coated anode Catalytic Layer and cathode catalysis layer, prepare a slice anode gas diffusion layer and a slice cathode gas diffusion layer more respectively, the back hot pressing that at last proton exchange membrane, the cathode gas diffusion layer of anode gas diffusion layer, coating on both sides Catalytic Layer superposeed successively forms membrane electrode;
Second method is the technology of coated catalysts hot repressing on gas diffusion layers: promptly prepare anode gas diffusion layer and cathode gas diffusion layer respectively, coated cathode Catalytic Layer on coated anode Catalytic Layer, cathode diffusion layer on the anode diffusion layer respectively then, at last, the cathode gas diffusion layer of the anode gas diffusion layer of a slice coated anode Catalytic Layer, a slice proton exchange membrane, a slice coated cathode Catalytic Layer is superposeed successively hot pressing forms membrane electrode.
Adopt above-mentioned two kinds of methods to make membrane electrode, membrane electrode can only be produced in process of production one by one, therefore has a lot of duplications of labour, and work efficiency is very low; In addition, the process that most importantly applies in the production process of membrane electrode, therefore, when a slice a slice was produced membrane electrode, each sheet membrane electrode all will pass through independent coating, and this certainly will cause the difference of performance between the membrane electrode.
China publication number: CN1276633, open day: on December 13rd, 2000 application number: CN00121124.2, the applying date: 2000.07.27, application for a patent for invention title: contain fuel cell of a plurality of membrane electrodes and preparation method thereof on a slice film, a kind of a plurality of membrane electrode preparation method that contain on a slice film are disclosed, it places on a slice proton exchange membrane by the template that will contain a plurality of geometries, geometric figure by template is coated in the Catalytic Layer slurry on the proton exchange membrane then, produces by the method for hot pressing at last and contains the multi-disc membrane electrode on a slice film.
There is following deficiency in this preparation method:
At first, by geometric template coated catalysts slurry is arranged, if guarantee not waste catalyst, then must in a geometry, apply catalyst, coated catalysts in another zone again, its essence still a slice a slice prepares membrane electrode, and therefore a lot of repeating steps are arranged, and wastes man-hour; If save time, and to all geometries coated catalysts simultaneously, promptly regions coated has also comprised the part at intermittence of the template that each geometry is separated, and is self-evident, this certainly will waste a lot of catalyst;
Secondly, disadvantage at coated catalysts on the proton exchange membrane is that proton exchange membrane more or less random contraction distortion can take place in coating procedure, therefore after a face coating is finished, two kinds of situations can take place when the proton exchange membrane upset was applied another face again, promptly, situation 1: film shrinks and causes that each geometry zone of template is greater than the Catalytic Layer zone that has applied, situation 2: the zone of the geometry in the template and the dislocation of the Catalytic Layer that has applied zone, can cause either way that below whole electro-chemical activity zone reduces, thereby waste material, the real output of battery does not reach design load simultaneously;
Once more, the film of, the coated catalysts that do not misplace fully corresponding for the both sides Catalytic Layer, because anode gas diffusion layer is identical with the area of Catalytic Layer with cathode gas diffusion layer, and the coated catalysts caudacoria is opaque, when this also can cause membrane electrode hot pressing, the difficulty of aliging between underside gas diffusion layer and the downside Catalytic Layer, therefore, after the membrane electrode hot pressing, cause easily between the upper and lower sides gas diffusion layers to misplace;
At last, simultaneously on a slice film, during 100 membrane electrodes of hot pressing as many as,, therefore, will cause the assembling difficulty, even can cause the serious consequence that multi-disc membrane electrode upper and lower sides gas diffusion layers all misplaces because the gas diffusion layers of upper and lower sides does not all have positioner.
Summary of the invention
At the problems referred to above, the invention provides a kind of batch manufacturing method of membrane electrode, its mass production is not only saved man-hour, is saved material, and contraposition is accurate between five parts of film electrode structure, stable performance.
A kind of batch manufacturing method of membrane electrode, its technical scheme is such:
It is characterized in that:
Its processing method is as follows:
(1) identical anode gas diffusion layer, the cathode gas diffusion layer of preparation area;
(2) form the anodic gas diffusion electrode, form the cathode gas diffusion electrode at the surface-coated anode catalyst layer of described anode gas diffusion layer at the surface-coated cathode catalysis layer of described cathode gas diffusion layer;
(3) described anodic gas diffusion electrode, cathode gas diffusion electrode are cut into the small pieces anodic gas diffusion electrode measure-alike, that quantity is identical, small pieces cathode gas diffusion electrode;
(4) described small pieces anodic gas diffusion electrode, small pieces cathode gas diffusion electrode are placed respectively among each upper ledge opening, lower frame opening of hot pressing die frame sheet, the size of described upper ledge opening, lower frame opening guarantees that described small pieces anodic gas diffusion electrode, small pieces cathode gas diffusion electrode are difficult for taking place relative displacement, described upper ledge opening, lower frame opening are corresponding to the same position of vertical direction, and tiling has proton exchange membrane between upper ledge, the lower frame;
(5) whole hot pressing die is put into after the hot press hot pressing and taking-up, prepared the disjunctor film electrode structure that many membrane electrodes are arranged on the film;
(6) the centre position punishment of disjunctor film electrode structure from the proton exchange membrane of adjacent single membrane electrode is separated, be divided into some membrane electrodes.
It is further characterized in that:
Its concrete steps are as follows:
A, cutting two be big to open measure-alike carbon system fiber materials, and the size dimension of every carbon system fiber material all is the multiple of the gas diffusion layers size dimension of the single membrane electrode that will prepare; Place polytetrafluoroethylsolution solution immersion, taking-up back to dry in the shade at air, carry out sintering at last the two big carbon system fiber materials of opening that cut, form anodic gas diffusion basic unit and cathode gas diffusion basic unit respectively; The slurry that carbon dust, polytetrafluoroethylsolution solution are constituted is coated in anodic gas diffusion basic unit and the cathode gas diffusion basic unit respectively, carry out sintering again, prepare anodic gas diffusion micropore sublayer and cathode gas diffusion micropore sublayer, thereby obtain the identical anode gas diffusion layer of area, cathode gas diffusion layer;
B, the mixed solution that anode catalyst and hydrogen ion exchange resin are constituted are coated on the anode gas diffusion layer that a makes in the step and oven dry, form anode catalyst layer on its surface, make the anodic gas diffusion electrode; The mixed solution that cathod catalyst and hydrogen ion exchange resin are constituted is coated on the cathode gas diffusion layer that a makes in the step and oven dry, forms cathode catalysis layer on its surface, makes the cathode gas diffusion electrode;
C, the anodic gas diffusion electrode that b was made in the step are cut into the small pieces anodic gas diffusion electrode measure-alike, that quantity is identical, small pieces cathode gas diffusion electrode with the cathode gas diffusion electrode;
D, all small pieces anodic gas diffusion electrodes are placed in each lower frame opening of lower frame sheet, its Catalytic Layer faces up, then cover a proton exchange membrane at lower frame sheet and small pieces anodic gas diffusion electrode upper surface, push down proton exchange membrane with the upper ledge sheet again, all small pieces cathode gas diffusion electrodes are placed in each upper ledge opening of upper ledge sheet, its Catalytic Layer faces down, and covers an independent metal last slice in the upper surface of upper ledge sheet and small pieces cathode gas diffusion electrode at last.
E, put into whole hot pressing die after the hot press hot pressing and take out, prepare the disjunctor film electrode structure that many membrane electrodes are arranged on the film, the process conditions of hot pressing are: temperature is that 110 ℃ ~ 170 ℃, pressure are that 2Bar ~ 150Bar, hot pressing time are 0.5 minute ~ 10 minutes;
F, the disjunctor film electrode structure is separated from the punishment of the centre position of the proton exchange membrane of adjacent single membrane electrode, be divided into some membrane electrodes.
It further is characterised in that:
Described d step can adopt following concrete steps: all small pieces cathode gas diffusion electrodes are placed in each lower frame opening of lower frame sheet, its Catalytic Layer faces up, then cover a proton exchange membrane at lower frame sheet and small pieces cathode gas diffusion electrode upper surface, push down proton exchange membrane with the upper ledge sheet again, all small pieces anodic gas diffusion electrodes are placed in each upper ledge opening of upper ledge sheet, its Catalytic Layer faces down, and covers an independent metal last slice in the upper surface of upper ledge sheet and small pieces anodic gas diffusion electrode at last;
Described carbon system fiber material can be carbon fiber paper or carbon cloth, the mass percent of polytetrafluoroethylene is 2% ~ 70% in described anodic gas diffusion basic unit and the described negative electrode utmost point gaseous diffusion basic unit, and the content of carbon dust all is 0.05mg/cm in described anodic gas diffusion micropore sublayer and the described cathode gas diffusion micropore sublayer
2~ 10mg/cm
2, the mass percent of polytetrafluoroethylene all is 2% ~ 70% in described anodic gas diffusion micropore sublayer and the described cathode gas diffusion micropore sublayer, described sintering temperature is 300 ℃ ~ 450 ℃;
Described anode catalyst and cathod catalyst can be Pt/C, Pd/C, Ru/C, Rh/C, Pt-Sn, Pt-Ir, Pt-IrO
2, Pt-Ru, Pt-Ru/C, Pt-Ru-Ir, Pt-RuO
2, RuO
2, IrO
2, RhO
2, Pt, Ir, Pd, Rh, the content of described anode catalyst and cathod catalyst all is 0.02mg/cm
2~ 20mg/cm
2, the mass percent of the hydrogen ion exchange resin in hydrogen ion exchange resin in the described anode catalyst layer and the described cathode catalysis layer all is 2% ~ 70%.
A kind of hot pressing die of making membrane electrode, it is characterized in that: it comprises lower frame sheet, upper ledge sheet, described lower frame sheet upper surface is evenly equipped with the lower frame opening, described upper ledge sheet lower surface is evenly equipped with the upper ledge opening, and described upper ledge opening, the lower frame opening size is identical, quantity is identical and corresponding to the same position of vertical direction.
It is further characterized in that: described lower frame opening runs through described lower frame sheet, and the lower surface pad of described lower frame sheet is equipped with the lower metal sheet;
Described upper ledge opening runs through described upper ledge sheet, and the upper surface of described upper ledge sheet is coated with the upper strata sheet metal.
The membrane electrode that adopts the inventive method to make, thus whole apply form anodic gas diffusion electrode, cathode gas diffusion electrode can reduce the duplication of labour, can not take place catalyst waste, improve the difference that the uniformity that applies reduces performance between the membrane electrode; In the upper and lower frame sheet of tool that many small pieces gas-diffusion electrodes are placed on hot-die, gas-diffusion electrode does not misplace in the time of can guaranteeing hot pressing, thereby improves the rate of finished products of membrane electrode production process greatly; Simultaneously because once can many membrane electrodes of hot pressing, have therefore shortened the time of hot pressing greatly; To sum up, the inventive method mass production membrane electrode is not only saved man-hour, is saved material, and contraposition is accurate between the each several part of film electrode structure, stable performance.
Description of drawings
Fig. 1 is the structural representation of hot pressing die of the present invention;
Fig. 2 is the assembling of small pieces gas-diffusion electrode of the present invention in the lower frame opening and the assembling of proton exchange membrane;
Fig. 3 is the assembling of small pieces gas-diffusion electrode of the present invention in the upper ledge opening and the assembling of metal last slice;
Fig. 4 is the structural representation of disjunctor membrane electrode of the present invention.
Embodiment
A kind of hot pressing die of making membrane electrode, see Fig. 1, it comprises lower frame sheet 1, upper ledge sheet 2, lower frame sheet 1 upper surface is evenly equipped with lower frame opening 3, upper ledge sheet 2 lower surfaces are evenly equipped with upper ledge opening 4, upper ledge opening 4, lower frame opening are 3 measure-alike, quantity is identical and corresponding to the same position of vertical direction, lower frame opening 3 runs through lower frame sheet 1, and the lower surface pad of lower frame sheet 1 is equipped with lower metal sheet 5; Upper ledge opening 4 runs through upper ledge sheet 2, and the upper surface of upper ledge sheet 2 is coated with upper strata sheet metal 6.Arrow is the assembly direction of each several part among the figure.
A kind of batch manufacturing method of membrane electrode is seen Fig. 2, Fig. 3, Fig. 4, and wherein the quantity of lower frame opening 3, upper ledge opening 4 and size are determined according to the quantity and the size of the membrane electrode that will prepare, and only are schematic construction among the figure:
Specific embodiment one: the batch process of membrane electrode of fuel batter with proton exchange film
Concrete production stage is as follows:
A, two 30cm of cutting
The carbon cloth of 15cm is with two 30cm that cut
The 15cm carbon cloth dries in the shade at air after placing polytetrafluoroethylsolution solution to soak, take out, carries out sintering at last in the time of 300 ℃, so obtain 30cm
Each one of the anodic gas diffusion basic unit of 15cm and cathode gas diffusion layer, the mass percent of polytetrafluoroethylene is 2% in the gas diffusion layers of weighing, the slurry that carbon dust, polytetrafluoroethylsolution solution are constituted is coated in anodic gas diffusion basic unit and the cathode gas diffusion basic unit respectively, carry out sintering again in the time of 450 ℃, thereby form anodic gas diffusion micropore sublayer and cathode gas diffusion micropore sublayer, its carbon powder content is 0.05mg/cm
2, its polytetrafluoroethylene mass percent all be 2%, 30cm
The anode gas diffusion layer of 15cm and cathode gas diffusion layer preparation are finished.；
B, with 0.02mg/cm
2Pt/C catalyst and the mixed solution that constitutes of hydrogen ion exchange resin be coated in the 30cm that makes in a step
Also oven dry on the 15cm anode gas diffusion layer, thus anode catalyst layer formed, prepare 30cm
15cm anodic gas diffusion electrode, wherein the mass percent of hydrogen ion exchange resin is 70%; With 20mg/cm
2Pt catalyst and the mixed solution that constitutes of hydrogen ion exchange resin be coated in the 30cm that makes in a step
Also oven dry on the 15cm cathode gas diffusion layer, thus cathode catalysis layer formed, prepare 30cm
15cm cathode gas diffusion electrode, wherein the mass percent of hydrogen ion exchange resin is 2%;
C, anodic gas diffusion electrode and cathode gas diffusion electrode that b was made in the step are cut into 25 6cm
The small pieces anodic gas diffusion electrode of 3cm, small pieces cathode gas diffusion electrode;
D, with 25 6cm
3cm anode small pieces gas-diffusion electrode places 25 lower frame openings 3 of hot pressing die lower frame sheet 1, its Catalytic Layer faces up, then cover a proton exchange membrane 7 in lower frame sheet 1 and 25 small pieces anodic gas diffusion electrode upper surface, push down proton exchange membrane 7 with upper ledge sheet 2 again, 25 small pieces cathode gas diffusion electrodes are placed in 25 upper ledge openings 4 of upper ledge sheet 2, its Catalytic Layer faces down, and at last covers an independent metal last slice 6 in the upper surface of upper ledge sheet 2 and 25 small pieces cathode gas diffusion electrode;
E, with hot pressing die with cover thereon metal last slice 6 and put into after the hot press hot pressing and take out, the temperature of its hot pressing is 110 ℃, the pressure of hot pressing is 150Bar, and hot pressing time is 0.5 minute, thereby prepares the disjunctor film electrode structure 8 that 25 membrane electrodes are arranged on the film;
F, disjunctor film electrode structure 8 is separated from the punishment of the centre position of the proton exchange membrane of adjacent single membrane electrode, be divided into 25 membrane electrodes, thereby finish the batch process of membrane electrode of fuel batter with proton exchange film.
Wherein, the thickness of sheet 5, metal last slice 6 is 0.01mm under the metal, the size on each bar limit of each lower frame opening 3 and each upper ledge opening 4 is all than the big 0.2mm of size on each bar limit of anode small pieces gas-diffusion electrode that is placed in one or negative electrode small pieces gas-diffusion electrode, the thickness of lower frame sheet 1 and upper ledge sheet 2 is than anode small pieces gas-diffusion electrode that places its each opening or the little 1mm of negative electrode small pieces gas-diffusion electrode, each upper ledge opening 4 and pairing each lower frame opening 3 overlap the offset error≤0.02mm between the corresponding opening.
Specific embodiment two: the batch process of direct methanol fuel cell membrane electrode
Concrete production stage is as follows:
A, two 20cm of cutting
The carbon fiber paper of 10cm is with two 20cm that cut
The 10cm carbon fiber paper dries in the shade at air after placing polytetrafluoroethylsolution solution to soak, take out, carries out sintering at last in the time of 150 ℃, so obtain 20m
Each one of the anodic gas diffusion basic unit of 10cm and cathode gas diffusion layer, the mass percent of polytetrafluoroethylene is 70% in the gas diffusion layers of weighing, the slurry that carbon dust, polytetrafluoroethylsolution solution are constituted is coated in anodic gas diffusion basic unit and the cathode gas diffusion basic unit respectively, carry out sintering again in the time of 300 ℃, thereby form anodic gas diffusion micropore sublayer and cathode gas diffusion micropore sublayer, its carbon powder content is 10mg/cm
2, its polytetrafluoroethylene mass percent all be 70%, 20cm
The anode gas diffusion layer of 10cm and cathode gas diffusion layer preparation are finished.；
B, with 20mg/cm
2Pt-Ru catalyst and the mixed solution that constitutes of hydrogen ion exchange resin be coated in the 20cm that makes in a step
Also oven dry on the 10cm anode gas diffusion layer, thus anode catalyst layer formed, prepare 20cm
10cm anodic gas diffusion electrode, wherein the mass percent of hydrogen ion exchange resin is 2%; With 0.05mg/cm
2Pt/C catalyst and the mixed solution that constitutes of hydrogen ion exchange resin be coated in the 20cm that makes in a step
Also oven dry on the 10cm cathode gas diffusion layer, thus cathode catalysis layer formed, prepare 20cm
10cm cathode gas diffusion electrode, wherein the mass percent of hydrogen ion exchange resin is 70%;
C, anodic gas diffusion electrode and cathode gas diffusion electrode that b was made in the step are cut into 2 10cm
The small pieces anodic gas diffusion electrode of 10cm, small pieces cathode gas diffusion electrode;
D, with 2 10cm
10cm negative electrode small pieces gas-diffusion electrode places 2 lower frame openings of hot pressing die lower frame sheet 1, its Catalytic Layer faces up, then cover a proton exchange membrane 7 in lower frame sheet 1 and 2 small pieces cathode gas diffusion electrode upper surface, push down proton exchange membrane 7 with upper ledge sheet 2 again, 2 small pieces anodic gas diffusion electrodes are placed in 2 upper ledge openings of upper ledge sheet 2, its Catalytic Layer faces down, and at last covers an independent metal last slice 6 in the upper surface of upper ledge sheet 2 and 2 small pieces anodic gas diffusion electrode;
E, with hot pressing die with cover thereon metal last slice 6 and put into after the hot press hot pressing and take out, the temperature of its hot pressing is 170 ℃, the pressure of hot pressing is 2Bar, hot pressing time is 10 minutes, thereby prepares the disjunctor film electrode structure 8 that 2 membrane electrodes are arranged on the film;
F, disjunctor film electrode structure 8 is separated from the punishment of the centre position of the proton exchange membrane of adjacent single membrane electrode, be divided into 2 membrane electrodes, thereby finish the batch process of membrane electrode of fuel batter with proton exchange film.
Wherein, the thickness of sheet 5, metal last slice 6 is 1mm under the metal, the size on each bar limit of each lower frame opening 3 and each upper ledge opening 4 is all than the big 0.02mm of size on each bar limit of anode small pieces gas-diffusion electrode that is placed in one or negative electrode small pieces gas-diffusion electrode, the thickness of lower frame sheet 1 and upper ledge sheet 2 is than anode small pieces gas-diffusion electrode that places its each opening or the little 0.02mm of negative electrode small pieces gas-diffusion electrode, each upper ledge opening 4 and pairing each lower frame opening 3 overlap the offset error≤0.03mm between the corresponding opening.
Specific embodiment three: the batch process of electrochemical length of schooling pure oxygen occurred pool membrane electrode
Concrete production stage is as follows:
A, two 40cm of cutting
The carbon fiber paper of 40cm is with two 40cm that cut
The 40cm carbon fiber paper dries in the shade at air after placing polytetrafluoroethylsolution solution to soak, take out, carries out sintering at last in the time of 370 ℃, so obtain 20m
Each one of the anodic gas diffusion basic unit of 10cm and cathode gas diffusion layer, the mass percent of polytetrafluoroethylene is 35% in the gas diffusion layers of weighing, the slurry that carbon dust, polytetrafluoroethylsolution solution are constituted is coated in anodic gas diffusion basic unit and the cathode gas diffusion basic unit respectively, carry out sintering again in the time of 370 ℃, thereby form anodic gas diffusion micropore sublayer and cathode gas diffusion micropore sublayer, its carbon powder content is 5mg/cm
2, its polytetrafluoroethylene mass percent all be 35%, 40cm
The anode gas diffusion layer of 40cm and cathode gas diffusion layer preparation are finished;
B, with 10mg/cm
2Ir catalyst and the mixed solution that constitutes of hydrogen ion exchange resin be coated in the 40cm that makes in a step
Also oven dry on the 40cm anode gas diffusion layer, thus anode catalyst layer formed, prepare 40cm
40cm anodic gas diffusion electrode, wherein the mass percent of hydrogen ion exchange resin is 35%; With 10mg/cm
2Pt catalyst and the mixed solution that constitutes of hydrogen ion exchange resin be coated in the 40cm that makes in a step
Also oven dry on the 40cm cathode gas diffusion layer, thus cathode catalysis layer formed, prepare 40cm
40cm cathode gas diffusion electrode, wherein the mass percent of hydrogen ion exchange resin is 35%;
C, anodic gas diffusion electrode and cathode gas diffusion electrode that b was made in the step are cut into 400 2cm
The small pieces anodic gas diffusion electrode of 2cm, small pieces cathode gas diffusion electrode;
D, with 400 2cm
2cm anode small pieces gas-diffusion electrode places 400 lower frame openings 3 of hot pressing die lower frame sheet 1, its Catalytic Layer faces up, then cover a proton exchange membrane 7 in lower frame sheet 1 and 400 small pieces anodic gas diffusion electrode upper surface, push down proton exchange membrane 7 with upper ledge sheet 2 again, 400 small pieces cathode gas diffusion electrodes are placed in 400 upper ledge openings of upper ledge sheet 2, its Catalytic Layer faces down, and at last covers an independent metal last slice 6 in the upper surface of upper ledge sheet 2 and 400 small pieces cathode gas diffusion electrode;
E, with hot pressing die with cover thereon metal last slice 6 and put into after the hot press hot pressing and take out, the temperature of its hot pressing is 140 ℃, the pressure of hot pressing is 75Bar, and hot pressing time is 5 minutes, thereby prepares the disjunctor film electrode structure 8 that 400 membrane electrodes are arranged on the film;
F, disjunctor film electrode structure 8 is separated from the punishment of the centre position of the proton exchange membrane of adjacent single membrane electrode, be divided into 2 membrane electrodes, thereby finish the batch process of membrane electrode of fuel batter with proton exchange film.
Wherein, the thickness of sheet 5, metal last slice 6 is 0.5mm under the metal, the size on each bar limit of each lower frame opening 3 and each upper ledge opening 4 is all than the big 0.1mm of size on each bar limit of anode small pieces gas-diffusion electrode that is placed in one or negative electrode small pieces gas-diffusion electrode, the thickness of lower frame sheet and 1 upper ledge sheet 2 is than anode small pieces gas-diffusion electrode that places its each opening or the little 0.5mm of negative electrode small pieces gas-diffusion electrode, each upper ledge opening 4 and pairing each lower frame opening 3 overlap the offset error≤0.01mm between the corresponding opening.
Claims (8)
1. the batch manufacturing method of a membrane electrode is characterized in that:
Its processing method is as follows:
(1) identical anode gas diffusion layer, the cathode gas diffusion layer of preparation area;
(2) form the anodic gas diffusion electrode, form the cathode gas diffusion electrode at the surface-coated anode catalyst layer of described anode gas diffusion layer at the surface-coated cathode catalysis layer of described cathode gas diffusion layer;
(3) described anodic gas diffusion electrode, cathode gas diffusion electrode are cut into the small pieces anodic gas diffusion electrode measure-alike, that quantity is identical, small pieces cathode gas diffusion electrode;
(4) described small pieces anodic gas diffusion electrode, small pieces cathode gas diffusion electrode are placed respectively among each upper ledge opening, lower frame opening of hot pressing die frame sheet, the size of described upper ledge opening, lower frame opening guarantees that described small pieces anodic gas diffusion electrode, small pieces cathode gas diffusion electrode are difficult for taking place relative displacement, described upper ledge opening, lower frame opening are corresponding to the same position of vertical direction, and tiling has proton exchange membrane between upper ledge, the lower frame;
(5) whole hot pressing die is put into after the hot press hot pressing and taking-up, prepared the disjunctor film electrode structure that many membrane electrodes are arranged on the film;
(6) the centre position punishment of disjunctor film electrode structure from the proton exchange membrane of adjacent single membrane electrode is separated, be divided into some membrane electrodes.
2. the batch manufacturing method of a kind of membrane electrode according to claim 1 is characterized in that:
Its concrete steps are as follows:
A, cutting two be big to open measure-alike carbon system fiber materials, and the size dimension of every carbon system fiber material all is the multiple of the gas diffusion layers size dimension of the single membrane electrode that will prepare; Place polytetrafluoroethylsolution solution immersion, taking-up back to dry in the shade at air, carry out sintering at last the two big carbon system fiber materials of opening that cut, form anodic gas diffusion basic unit and cathode gas diffusion basic unit respectively; The slurry that carbon dust, polytetrafluoroethylsolution solution are constituted is coated in anodic gas diffusion basic unit and the cathode gas diffusion basic unit respectively, carry out sintering again, prepare anodic gas diffusion micropore sublayer and cathode gas diffusion micropore sublayer, thereby obtain the identical anode gas diffusion layer of area, cathode gas diffusion layer;
B, the mixed solution that anode catalyst and hydrogen ion exchange resin are constituted are coated on the anode gas diffusion layer that a makes in the step and oven dry, form anode catalyst layer on its surface, make the anodic gas diffusion electrode; The mixed solution that cathod catalyst and hydrogen ion exchange resin are constituted is coated on the cathode gas diffusion layer that a makes in the step and oven dry, forms cathode catalysis layer on its surface, makes the cathode gas diffusion electrode;
C, the anodic gas diffusion electrode that b was made in the step are cut into the small pieces anodic gas diffusion electrode measure-alike, that quantity is identical, small pieces cathode gas diffusion electrode with the cathode gas diffusion electrode;
D, all small pieces anodic gas diffusion electrodes are placed in each lower frame opening of lower frame sheet, its Catalytic Layer faces up, then cover a proton exchange membrane at lower frame sheet and small pieces anodic gas diffusion electrode upper surface, push down proton exchange membrane with the upper ledge sheet again, all small pieces cathode gas diffusion electrodes are placed in each upper ledge opening of upper ledge sheet, its Catalytic Layer faces down, and covers an independent metal last slice in the upper surface of upper ledge sheet and small pieces cathode gas diffusion electrode at last.
E, put into whole hot pressing die after the hot press hot pressing and take out, prepare the disjunctor film electrode structure that many membrane electrodes are arranged on the film, the process conditions of hot pressing are: temperature is that 110 ℃ ~ 170 ℃, pressure are that 2Bar ~ 150Bar, hot pressing time are 0.5 minute ~ 10 minutes;
F, the disjunctor film electrode structure is separated from the punishment of the centre position of the proton exchange membrane of adjacent single membrane electrode, be divided into some membrane electrodes.
3. the batch manufacturing method of a kind of membrane electrode according to claim 2, it is characterized in that: described d step can adopt following concrete steps: all small pieces cathode gas diffusion electrodes are placed in each lower frame opening of lower frame sheet, its Catalytic Layer faces up, then cover a proton exchange membrane at lower frame sheet and small pieces cathode gas diffusion electrode upper surface, push down proton exchange membrane with the upper ledge sheet again, all small pieces anodic gas diffusion electrodes are placed in each upper ledge opening of upper ledge sheet, its Catalytic Layer faces down, and covers an independent metal last slice in the upper surface of upper ledge sheet and small pieces anodic gas diffusion electrode at last.
4. the batch manufacturing method of a kind of membrane electrode according to claim 2, it is characterized in that: described carbon system fiber material can be carbon fiber paper or carbon cloth, the mass percent of polytetrafluoroethylene is 2% ~ 70% in described anodic gas diffusion basic unit and the described negative electrode utmost point gaseous diffusion basic unit, and the content of carbon dust all is 0.05mg/cm in described anodic gas diffusion micropore sublayer and the described cathode gas diffusion micropore sublayer
2~ 10mg/cm
2, the mass percent of polytetrafluoroethylene all is 2% ~ 70% in described anodic gas diffusion micropore sublayer and the described cathode gas diffusion micropore sublayer, described sintering temperature is 300 ℃ ~ 450 ℃.
5. the batch manufacturing method of a kind of membrane electrode according to claim 2, it is characterized in that: described anode catalyst and cathod catalyst can be Pt/C, Pd/C, Ru/C, Rh/C, Pt-Sn, Pt-Ir, Pt-IrO
2, Pt-Ru, Pt-Ru/C, Pt-Ru-Ir, Pt-RuO
2, RuO
2, IrO
2, RhO
2, Pt, Ir, Pd, Rh, the content of described anode catalyst and cathod catalyst all is 0.02mg/cm
2~ 20mg/cm
2, the mass percent of the hydrogen ion exchange resin in hydrogen ion exchange resin in the described anode catalyst layer and the described cathode catalysis layer all is 2% ~ 70%.
6. hot pressing die of making membrane electrode, it is characterized in that: it comprises lower frame sheet, upper ledge sheet, described lower frame sheet upper surface is evenly equipped with the lower frame opening, described upper ledge sheet lower surface is evenly equipped with the upper ledge opening, and described upper ledge opening, the lower frame opening size is identical, quantity is identical and corresponding to the same position of vertical direction.
7. a kind of hot pressing die of making membrane electrode according to claim 6 is characterized in that: described lower frame opening runs through described lower frame sheet, and the lower surface pad of described lower frame sheet is equipped with the lower metal sheet.
8. a kind of hot pressing die of making membrane electrode according to claim 6 is characterized in that: described upper ledge opening runs through described upper ledge sheet, and the upper surface of described upper ledge sheet is coated with the upper strata sheet metal.
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| CN103165904A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Integrated regenerative fuel cell membrane electrode assembly and preparation method thereof |
| CN105513471A (en) * | 2016-01-11 | 2016-04-20 | 绍兴俊吉能源科技有限公司 | Mould and method for manufacturing hydrogen fuel cell module used as demonstration teaching aid and cell module |
| CN108788128A (en) * | 2018-06-28 | 2018-11-13 | 西北工业大学 | A kind of preparation method of the porous iridium ventail of nuclear battery transom |
| CN113549944A (en) * | 2021-04-21 | 2021-10-26 | 上海交通大学 | Preparation method of trace oxygen generation module and jig assembly thereof |
| CN114024011A (en) * | 2021-11-08 | 2022-02-08 | 苏州安洁科技股份有限公司 | MEA product roll-cutting process |
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| CN103165904A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Integrated regenerative fuel cell membrane electrode assembly and preparation method thereof |
| CN103165904B (en) * | 2011-12-19 | 2015-05-20 | 中国科学院大连化学物理研究所 | Integrated regenerative fuel cell membrane electrode assembly and preparation method thereof |
| CN105513471A (en) * | 2016-01-11 | 2016-04-20 | 绍兴俊吉能源科技有限公司 | Mould and method for manufacturing hydrogen fuel cell module used as demonstration teaching aid and cell module |
| CN108788128A (en) * | 2018-06-28 | 2018-11-13 | 西北工业大学 | A kind of preparation method of the porous iridium ventail of nuclear battery transom |
| CN113549944A (en) * | 2021-04-21 | 2021-10-26 | 上海交通大学 | Preparation method of trace oxygen generation module and jig assembly thereof |
| CN113549944B (en) * | 2021-04-21 | 2022-03-29 | 上海交通大学 | Preparation method of trace oxygen generation module and jig assembly thereof |
| CN114024011A (en) * | 2021-11-08 | 2022-02-08 | 苏州安洁科技股份有限公司 | MEA product roll-cutting process |
| CN114024011B (en) * | 2021-11-08 | 2024-01-26 | 苏州安洁科技股份有限公司 | MEA product roller cutter process |
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