CN107881528A - The preparation and membrane electrode and application of a kind of electrolytic cell membrane electrode - Google Patents
The preparation and membrane electrode and application of a kind of electrolytic cell membrane electrode Download PDFInfo
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- CN107881528A CN107881528A CN201610861729.7A CN201610861729A CN107881528A CN 107881528 A CN107881528 A CN 107881528A CN 201610861729 A CN201610861729 A CN 201610861729A CN 107881528 A CN107881528 A CN 107881528A
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- 239000012528 membrane Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims description 16
- 210000000170 cell membrane Anatomy 0.000 title claims description 4
- 239000007789 gas Substances 0.000 claims abstract description 34
- 238000009792 diffusion process Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000003197 catalytic effect Effects 0.000 claims abstract description 16
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001257 hydrogen Substances 0.000 claims abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 6
- 239000003054 catalyst Substances 0.000 claims description 67
- 239000000463 material Substances 0.000 claims description 38
- 210000004027 cell Anatomy 0.000 claims description 29
- 229920000557 Nafion® Polymers 0.000 claims description 25
- 238000007731 hot pressing Methods 0.000 claims description 17
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 14
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 13
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 7
- 238000006555 catalytic reaction Methods 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000008393 encapsulating agent Substances 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 239000010931 gold Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 230000036571 hydration Effects 0.000 claims description 2
- 238000006703 hydration reaction Methods 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 229910052741 iridium Inorganic materials 0.000 claims description 2
- 239000002082 metal nanoparticle Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 19
- 239000006227 byproduct Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000011229 interlayer Substances 0.000 claims 1
- 238000005457 optimization Methods 0.000 abstract description 8
- 239000000446 fuel Substances 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000306 component Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical compound Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000005349 anion exchange Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The present invention relates to a kind of method for preparing membrane electrode of the electrolysis of optimization.The membrane electrode assembly includes Catalytic Layer, cathode gas diffusion layer, anode gas diffusion layer, the particular combination of PEM.There is preferable performance when membrane electrode assembly prepared by the present invention is used as into PEM (PEM) water electrolytic cell.The present invention has extensive value in regeneratable fuel cell (RFC), photoelectrocatalysis, electrolysis hydrogen generator device.
Description
Technical field
The present invention relates to a kind of preparation method of the electrolytic cell of optimization, the membrane electrode assembly includes PEM Yin/Yang
The particular combination of pole Catalytic Layer, Yin/Yang pole gas diffusion layers.It can be applied in PEM water electrolysis, RFC or various electrolysis units.
Background technology
In recent years, solid polymer electrolyte (PEM) water electrolysis technology because of it efficiently, zero-emission, compact-sized, environment is friendly
Well, the advantages that product purity is high, the study hotspot of hydrogen preparation field is become, and the oxygen of its product high-purity also has been used for navigating
My god, medical treatment, analysis etc. field.For membrane electrode as PEM water electrolytic cell core components, it is to improve electrolysis effect to carry out the optimization in structure
Rate is the focus of various countries researcher.
The electrolytic process of proton exchange membrane water electrolyzer pond (PEMWE) is analyzed, in water electrolytic cell, anode again make by applied voltage
Electronics is lost under, i.e. water loses electronics and precipitated oxygen in anode, produces hydrogen ion.The shape that hydrogen ion passes through hydrogen ion
Formula is electronically generated hydrogen by PEM film, what negative electrode obtained external circuit.In the structure of this electrolytic cell, membrane electrode
Component is the generation place of cell reaction, is the core of electrolytic cell.Its composition includes：The catalysis occurred for electrochemical reaction
Layer, water guide, lead hydrionic PEM (PEM) and transmit the diffusion layer of water and gas.Wherein, Catalytic Layer is by catalyst
Formed with Nafion.Membrane electrode assembly is the core of electrolytic cell, directly influence electrolytic efficiency, electrolysis energy consumption, electrolysis cost with
And the life-span of electrolytic cell.Traditional membrane electrode preparation technology is to coat catalyst on the gas diffusion, prepares gas diffusion
Layer electrode.But gas diffusion layers electrode contacted with the surface of PEM it is not close, so as to can be produced between the two poles of the earth compared with
Big voltage drop.Therefore the catalyst Film electrode for being more beneficial for reducing contact resistance between Catalytic Layer and PEM obtains
The extensive concern of people.But the ratio of Nafion and catalyst directly affects the micro- of electrode itself in the catalyst Film electrode
The porosity of structure and electrode in itself is seen, optimizes the mass ratio of Nafion and catalyst in Catalytic Layer, acquisition more performance is more
For excellent catalyst Film electrode, will have broad application prospects.
Prepared by the membrane electrode of PEMWE water electrolytic cells can use gas-diffusion electrode (GDE, gas diffusion
Electrode) technique, by catalyst directly coated on diffusion layer, can also use catalyst Film electrode (CCM,
Catalyst coated membrane) electrode process, by pressure sintering, electrochemical deposition method, the methods of spraying, by catalyst
Prepare on PEM membrane.It is more tight due to being contacted between Catalytic Layer and PEM using membrane electrode assembly made from CCM methods
It is close, thus there is the characteristics of impedance is small, we just take CCM methods to prepare membrane electrode in the present invention.
The content of the invention
The present invention relates to a kind of preparation method of the electrolysis of optimization.The membrane electrode assembly is PEM Yin/Yang pole
The particular combination of Catalytic Layer, Yin/Yang pole gas diffusion layers.Membrane electrode assembly prepared by the present invention is used as PEM
(PEM) there is preferable performance during water electrolytic cell.The present invention is in regeneratable fuel cell (RFC), photoelectrocatalysis, electrolysis hydrogen hair
There is extensive value in raw device device.
A kind of preparation method of electrolytic cell membrane electrode, the membrane electrode are the sandwich of " five layers ", including layer successively
Folded cathode gas diffusion layer, cathode catalysis layer, PEM, anode catalyst layer and anode gas diffusion layer；The film
The preparation of electrode follows following steps：
(1) required cathod catalyst, anode catalyst are weighed respectively first, according still further to catalyst and Nafion according to 4:1
~7:1 mass ratio is blended in dispersant respectively, and the mass ratio of catalyst and dispersant is 1:10~1:40, by what is mixed
Slurry 10~30min of ultrasonic mixing, the both sides of PEM are sprayed at respectively, catalyst Film electrode is obtained in film both sides；
Dispersant is the one or two or more kinds in ethanol, isopropanol, normal propyl alcohol, and dispersant uniformly mixes catalyst granules with Nafion
It is combined；
(2) with hollow, annular two panels closed material by the surrounding of obtained catalyst Film electrode in step (1)
Edge is clamped, and obtained catalyst Film electrode in step (1) is between two panels closed material, and catalyst Film electrode
Edge is gripped by two panels closed material, and the negative electrode in the hollow part of closed material cathode catalysis layer side is urged
Change and place carbon paper gas diffusion layers on layer, carbon paper gas diffusion layers are identical with the hollow annular region thickness of closed material, area
It is equal, shape is identical, i.e. specification is consistent；Placed on the anode catalyst layer of the hollow part of closed material anode catalyst layer side
A piece of, area equation identical with closed material hollow region thickness, shape be identical, i.e. the consistent ptfe sheet of specification；
(3) the catalyst Film electrode clamped by two panels closed material is clamped with two panels polytetrafluoroethylene film, makes two
Piece closed material and the catalyst Film electrode in them are between two panels polytetrafluoroethylene film, and will clamp catalyst
The two panels polytetrafluoroethylene film of Film electrode is positioned between two panels metal splint；Metal splint is placed in 40~100 DEG C
0.5~5min of hot pressing among hydraulic press；Metal splint, ptfe sheet, polytetrafluoroethylene film are removed after hot pressing,
Placed and closed material hollow region thickness phase on the anode catalyst layer of the hollow part of closed material anode catalyst layer side
With, area equation, shape is identical, i.e. the consistent POROUS TITANIUM PLATE of specification, you can obtains membrane electrode assembly.
The membrane electrode of preparation is divided into " five layers " sandwich, including PEM, is catalyzed positioned at the Yin/Yang pole of film both sides
Layer, and the Yin/Yang pole gas diffusion layers positioned at Yin/Yang pole Catalytic Layer outer surface.
Spraying operation described in step (1) is carried out in thermal station, and thermal station temperature maintains constant at 40~80 DEG C.
Step (1) the Yin/Yang electrode catalyst is one or two or more kinds of in precious metals pt, Pd, Ru, Rh, Ir
One or two or more kinds in support type or unsupported proof gold metal nano-particle, the catalyst loading be 0.5~
3.0mg/cm2。
Two panels closed material hollow region inside casing size and/or shape is different in step (2), and it is in order to avoid in oil pressure
Closed material inside casing edge produces excessive shear stress and tears film when hot pressing is carried out on machine.
6. according to the method for preparing membrane electrode described in claim 1, it is characterised in that：
The closed material of selection can be the encapsulants such as polyester frame or rubber frame；
The PEM of selection is the PEM using Nafion membrane as representative, such as Nafion 117 or Nafion
211 etc.；
The carbon paper for the increasing hydration process that selected cathode gas diffusion layer is 0.2~0.3mm of thickness；Anodic gas spreads
Layer is 0.7~0.8mm of thickness platinum plating POROUS TITANIUM PLATE.
The pressure that step (3) described hot pressing uses is 0.1~0.5MPa, and hot pressing temperature is 100~140 DEG C, hot pressing
Time is 60~90s.
Spray gun source of the gas used in step (1) described spraying operation is inert gas, such as nitrogen and/or argon gas, sprays pressure control
System is in 0.05~0.2MPa；
The membrane electrode being prepared can be applied to RFC, photoelectrocatalysis, PEM water electrolytic cells or acid hydrogen generated by electrolyzing water
In generator.
Preferably implementation condition of the invention is：
1st, compared with the gas diffusion layers electrode in PEM water electrolysis technologies, catalyst Film electrode can be largely
The upper ohmmic drop for reducing electrolytic cell the two poles of the earth, so as to improve the performance of electrolytic cell.
2nd, MEA can be more smooth by hot pressing under the hot pressing condition by optimization, completes the system of MEA electrodes integration
Make.
3rd, MEA (catalyst and Nafion ratios 4 under the catalysis stratum proportion by optimization:1~7:1) can reach compared with
Good electrolytic cell performance.
Advantages of the present invention：
1st, using the catalyst Film electrode structure after optimization, electrolytic cell is reduced compared with traditional gas diffusion layer electrode
Ohmmic drop loss, improve the operating efficiency of electrolytic cell.And aerogenesis is free of alkali steam, without purification.
2nd, the inventive method is simple and easy to control, economical rationality, and product preparation efficiency is high.
Brief description of the drawings
A kind of structure chart of Fig. 1 electrolysis of optimization membrane electrodes of the transition zone containing Nafion.
Fig. 2 actual motion electrolyser construction schematic diagrames.
In figure:1- gas diffusion layers；2- cathode/anode polyester frames；3- cathode/anode catalyst layers；4- anion exchanges
Film；5- Titanium end plates；6- flow fields；7- sealing gaskets；8- membrane electrode assemblies.
Polarization curves of Fig. 3 using deionized water as the PEM water electrolytic cells of electrolyte, anode catalyst loading 1.5mg/
cm2, catalyst and Nafion mass ratioes are 4 in Catalytic Layer:1, negative electrode 70wt.%Pt/C, Pt loading 0.7mg/cm2, NAFION
117 films, electrode area 5cm2, 80 DEG C of test temperature.
Polarization curves of Fig. 4 using deionized water as the PEM water electrolytic cells of electrolyte, anode catalyst loading 1.5mg/
cm2, catalyst and Nafion mass ratioes are 5 in Catalytic Layer:1, negative electrode 70wt.%Pt/C, Pt loading 0.7mg/cm2, NAFION
117 films, electrode area 5cm2, 80 DEG C of test temperature.
Polarization curves of Fig. 5 using deionized water as the PEM water electrolytic cells of electrolyte, anode catalyst loading 1.5mg/
cm2, catalyst and Nafion mass ratioes are 4 in gas diffusion layers electrode catalyst layer:1, negative electrode 70wt.%Pt/C, Pt loading
0.7mg/cm2, the films of NAFION 117, electrode area 5cm2, 80 DEG C of test temperature.
Embodiment
Embodiment 1
(1) preparation of catalyst pulp：Weigh that 93mg Ir are black, 62mg 70wt.% Pt/C first, according still further to catalyst
With Nafion according to 4:1 mass ratio is blended in a certain amount of ethanol respectively, and the mass ratio of catalyst and ethanol is 1:40, will
The slurry ultrasonic mixing 20min mixed；
(2) spraying of catalyst pulp：The uniform catalyst pulp of ultrasound in (1) is sprayed on to the both sides of film, above-mentioned spray
Apply operation to carry out in thermal station, thermal station temperature maintains constant at 60 DEG C.
(3) closed material is extracted：The closed material is divided into two panels, the closed material inside casing long 3.0cm of cathode side, wide
2.5cm, the long 2.5cm of anode-side closed material inside casing, wide 2.0cm, closed material inside casing of different sizes is in order to avoid in oil pressure
Closed material inside casing edge produces excessive shear stress and tears film when hot pressing is carried out on machine.
(4) compacting of membrane electrode assembly：Closed material is by the obtained proton exchange film edge for being coated with Catalytic Layer in (2)
Clamp, it is corresponding in anode in the big carbon paper such as the hollow inside casing placement of negative electrode closed material and inside casing as cathode gas diffusion layer
Lay a piece of ptfe sheet for meeting closed material inside casing size in region.Membrane electrode is pressed from both sides with polytetrafluoroethylene film
Firmly, it is positioned between two panels Titanium clamping plate, is placed in hot pressing 90s among 60 DEG C of hydraulic press, hot pressing, which finishes, removes steel plate, poly- four
Fluorine thin slice, POROUS TITANIUM PLATE is placed as anode diffusion layer in MEA anode-sides, membrane electrode assembly, MEA final structure is tentatively made
As shown in Figure 1.
The present invention is investigated to membrane electrode assembly in actual electrolytic cell, and apparatus structure is as shown in Figure 2：In full battery
In, using platinum plating POROUS TITANIUM PLATE as anode gas diffusion layer, deionized water is as electrolyte, and electrolyte is with 60mL/min stream
Amount is passed through electrolytic cell by anode, and electrolytic cell running temperature is 80 DEG C, and dependence test result is as shown in Figure 3.By to membrane electrode assembly
Each component materials of part, and the exploration of each step each group distribution ratio of Catalytic Layer, obtain the overall performance of preferable electrolytic cell, make electricity
Xie Chi decomposition voltage is reduced to 1.777V 1000mA/cm2。
Embodiment 2
The content of Nafion in Catalytic Layer is found in experimentation can influence the overall performance of electrolytic cell, by MEA
The regulation of variant component proportion in preparation process, when the mass ratio of catalyst in Catalytic Layer and Nafion (AS-4) is 5:When 1,
Electrolytic cell performance has been lifted.Fig. 4 be with the same test of example 1 under the conditions of full battery steady-state polarization.The now electricity
Xie Chi decomposition voltage is reduced to 1.797V 1000mA/cm2。
Embodiment 3
Gas diffusion layers electrode is prepared by substrate of carbon paper, catalyst and Nafion mass ratioes are 5 in the electrode:1, other
Battery parameter is same as Example 1, Fig. 5 be with the same test of example 1 under the conditions of full battery steady-state polarization, electrolytic cell
Performance is decreased obviously.Now the decomposition voltage of the electrolytic cell is reduced to 1.832V@1000mA/cm2。
Claims (10)
- A kind of 1. preparation method of electrolytic cell membrane electrode, it is characterised in that：The membrane electrode is the sandwich of " five layers ", is wrapped Include the cathode gas diffusion layer stacked gradually, cathode catalysis layer, PEM, anode catalyst layer and anodic gas diffusion Layer；The preparation of the membrane electrode follows following steps：(1) required cathod catalyst, anode catalyst are weighed respectively first, according still further to catalyst and Nafion according to 4:1~7:1 Mass ratio be blended in respectively in dispersant, the mass ratio of catalyst and dispersant is 1:10~1:40, the slurry that will be mixed 10~30min of ultrasonic mixing, the both sides of PEM are sprayed at respectively, catalyst Film electrode is obtained in film both sides；It is scattered Agent is the one or two or more kinds in ethanol, isopropanol, normal propyl alcohol, and catalyst granules and Nafion are evenly mixed in by dispersant Together；(2) edge of obtained catalyst Film electrode in step (1) is pressed from both sides with hollow, annular two panels closed material Firmly, obtained catalyst Film electrode in step (1) is made to be between two panels closed material, and the surrounding of catalyst Film electrode Edge is gripped by two panels closed material, and in the cathode catalysis layer of the hollow part of closed material cathode catalysis layer side Upper placement carbon paper gas diffusion layers, carbon paper gas diffusion layers are identical with the hollow annular region thickness of closed material, area equation, Shape is identical, i.e. specification is consistent；Placed on the anode catalyst layer of the hollow part of closed material anode catalyst layer side a piece of , area equation identical with closed material hollow region thickness, shape be identical, i.e. the consistent ptfe sheet of specification；(3) the catalyst Film electrode clamped by two panels closed material is clamped with two panels polytetrafluoroethylene film, seals two panels Close material and the catalyst Film electrode in them is between two panels polytetrafluoroethylene film, and catalyst overlay film will be clamped The two panels polytetrafluoroethylene film of electrode is positioned between two panels metal splint；Metal splint is placed in 40~100 DEG C of oil pressure 0.5~5min of hot pressing among machine；Metal splint, ptfe sheet, polytetrafluoroethylene film are removed after hot pressing, is being sealed Close placement, face identical with closed material hollow region thickness on the anode catalyst layer of the hollow part of material anode catalyst layer side Product is equal, shape is identical, i.e. the consistent POROUS TITANIUM PLATE of specification, you can acquisition membrane electrode assembly.
- 2. according to the method for preparing membrane electrode described in claim 1, it is characterised in that：The membrane electrode of preparation is divided into " five layers " interlayer Structure, including PEM, the Yin/Yang pole Catalytic Layer positioned at film both sides, and positioned at Yin/Yang pole Catalytic Layer outer surface Yin/Yang pole gas diffusion layers.
- 3. according to the method for preparing membrane electrode described in claim 1, it is characterised in that：Spraying operation described in step (1) exists Carried out in thermal station, thermal station temperature maintains constant at 40~80 DEG C.
- 4. according to the method for preparing membrane electrode described in claim 1, it is characterised in that：Step (1) the Yin/Yang electrode catalyst choosing From in one or two or more kinds of support type in precious metals pt, Pd, Ru, Rh, Ir or unsupported proof gold metal nano-particle One or two or more kinds, the catalyst loading are 0.5~3.0mg/cm2。
- 5. according to the method for preparing membrane electrode described in claim 1, it is characterised in that：Two panels closed material is hollow in step (2) Region inside casing size and/or shape is different, and it is in order to avoid when carrying out hot pressing on hydraulic press, is produced from closed material inside casing edge Raw excessive shear stress tears film.
- 6. according to the method for preparing membrane electrode described in claim 1, it is characterised in that：The closed material of selection can be the encapsulants such as polyester frame or rubber frame；The PEM of selection is the PEM using Nafion membrane as representative, such as Nafion 117 or Nafion 211 Deng；The carbon paper for the increasing hydration process that selected cathode gas diffusion layer is 0.2~0.3mm of thickness；Anode gas diffusion layer is 0.7~0.8mm of thickness platinum plating POROUS TITANIUM PLATE.
- 7. according to the method for preparing membrane electrode described in claim 1, it is characterised in that：What step (3) described hot pressing used Pressure is 0.1~0.5MPa, and hot pressing temperature is 100~140 DEG C, and hot pressing time is 60~90s.
- 8. according to the spraying operation described in claim 1, it is characterised in that：Spray gun source of the gas used in step (1) described spraying operation For inert gas, such as nitrogen and/or argon gas, spraying pressure control is in 0.05~0.2MPa.
- A kind of 9. membrane electrode prepared by any preparation methods of claim 1-8.
- A kind of 10. application of membrane electrode described in claim 9, it is characterised in that：The membrane electrode being prepared can be applied to In RFC, photoelectrocatalysis, PEM water electrolytic cells or acid water electrolysis hydrogen generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861729.7A CN107881528A (en) | 2016-09-29 | 2016-09-29 | The preparation and membrane electrode and application of a kind of electrolytic cell membrane electrode |
Applications Claiming Priority (1)
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| CN110820007A (en) * | 2019-11-14 | 2020-02-21 | 深圳大学 | PBI proton exchange membrane electrolysis module and seawater electrolysis hydrogen production device |
| CN113235120A (en) * | 2021-03-30 | 2021-08-10 | 清华大学 | Membrane electrode assembly and water electrolysis device |
| CN113488687A (en) * | 2021-07-29 | 2021-10-08 | 上海神力科技有限公司 | Membrane electrode assembly of fuel cell and preparation method thereof |
| CN113913843B (en) * | 2021-10-15 | 2023-02-10 | 嘉善恒兴电力建设有限公司 | Method for producing hydrogen by electrolyzing water in proton exchange membrane electrolytic cell |
| CN113913843A (en) * | 2021-10-15 | 2022-01-11 | 嘉善恒兴电力建设有限公司 | Method for producing hydrogen by electrolyzing water in proton exchange membrane electrolytic cell |
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