CN118028860A - Polar plate with multiple reaction areas and hydrogen production structure - Google Patents
Polar plate with multiple reaction areas and hydrogen production structure Download PDFInfo
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- CN118028860A CN118028860A CN202410218753.3A CN202410218753A CN118028860A CN 118028860 A CN118028860 A CN 118028860A CN 202410218753 A CN202410218753 A CN 202410218753A CN 118028860 A CN118028860 A CN 118028860A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 83
- 239000001257 hydrogen Substances 0.000 title claims abstract description 43
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 43
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 238000009792 diffusion process Methods 0.000 claims description 46
- 239000007789 gas Substances 0.000 claims description 41
- 239000003792 electrolyte Substances 0.000 claims description 37
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 25
- 239000010936 titanium Substances 0.000 claims description 24
- 229910052719 titanium Inorganic materials 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 6
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 5
- 229920002530 polyetherether ketone Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000005868 electrolysis reaction Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 5
- 239000011112 polyethylene naphthalate Substances 0.000 description 5
- 239000004734 Polyphenylene sulfide Substances 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 polyethylene naphthalate Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 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
- C25B11/036—Bipolar electrodes
-
- 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
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
- C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application provides a polar plate with multiple reaction areas, which comprises a polar plate body, wherein one side surface of the polar plate body is provided with an anode area, and the other side surface of the polar plate body is provided with a cathode area; the anode region comprises at least two anode region units connected with each other; each anode region unit is independent and symmetrically arranged; the two anode region units are connected through a first separation region; the cathode region comprises at least two connected cathode region units; each cathode region unit is independent and symmetrically arranged; the two cathode region units are connected through a second partition region. The application also provides a hydrogen production structure. The polar plate with multiple reaction areas and the hydrogen production structure are adopted, so that the area of the reaction area is conveniently expanded, and the area of the reaction area of the single-chip battery is larger. Compared with the traditional single-reaction-area polar plate and hydrogen production structure, the structure of the application avoids the preparation difficulty of large-area proton membranes and membrane electrodes, and has more advantages for the hydrogen production structure with high hydrogen yield.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a polar plate with multiple reaction areas and a hydrogen production structure.
Background
Because renewable energy sources such as wind power generation, photovoltaic power generation and the like have volatility and intermittence, the produced electric power cannot be combined with a power grid, and a large number of phenomena of wind and light abandoning are caused. The hydrogen production by water electrolysis can convert electric energy into chemical energy stored in the hydrogen, and the hydrogen is a green pollution-free secondary energy carrier. The electric power which has volatility and can be converted from renewable energy sources is combined with the electrolytic water to prepare hydrogen gas to complete the large-scale preparation of hydrogen, and the electric power becomes a hot spot of current academic and commercial attention.
Currently, the technologies for producing hydrogen by electrolysis of water mainly include alkaline water electrolysis cells (AE), proton exchange membrane water electrolysis cells (PEM) and solid oxide water electrolysis cells (SOEC). Among them, alkaline cells have been the longest in technological development and the most mature in technology, but have poor power supply fluctuation resistance. Compared with the traditional alkaline water electrolysis hydrogen production, the PEM hydrogen production has the advantages of higher output gas pressure, good purity, no need of purification, high current density and more compact structure; the system for producing hydrogen by electrolyzing water through PEM has very high response speed, is more suitable for dynamic operation, and is more suitable for fluctuating power of possible energy sources.
For high-power electrolytic tank equipment, the required electrode plate area is larger, the membrane electrode area is larger and the reaction area is larger, so that the preparation requirement for the membrane electrode is higher, and particularly the area of a proton membrane is larger. The preparation process of the proton membrane with large area and high width has high requirements, on one hand, the equipment investment is too high, and on the other hand, the uniformity of the proton membrane thickness is difficult to ensure when the area is large, which is also an important factor of the high-power PEM electrolytic tank which limits the specification of high-yield hydrogen.
The hydrogen yield of the PEM single tank published in China at present is 250 standard square/hour at most. The high-power and high-hydrogen-yield PEM electrolytic tank is a trend of the current hydrogen production technology, and the preparation of a large-area membrane electrode is the most important limiting factor at present, wherein the preparation difficulty of a large-area proton membrane is high, the uniformity of the proton membrane thickness is difficult to ensure, and the consistency and the safety of the reaction of each single cell of the electrolytic tank are further influenced.
Disclosure of Invention
Based on the problems, the embodiment of the invention provides a polar plate with multiple reaction areas and a hydrogen production structure, and aims to solve the problems that the existing large-area proton membrane is high in preparation difficulty, uniformity of a proton membrane thickness is difficult to ensure, and consistency and safety of reaction of each single cell of an electrolytic cell are easy to influence.
In order to achieve the above objective, in one aspect, an embodiment of the present invention provides a polar plate with multiple reaction areas, including a polar plate body, where one side surface of the polar plate body is set as an anode area, and the other side surface is set as a cathode area;
The anode region comprises at least two anode region units connected with each other; each anode region unit is independent and symmetrically arranged; the two anode region units are connected through a first separation region;
the cathode region comprises at least two connected cathode region units; each cathode region unit is independent and symmetrically arranged; the two cathode region units are connected through a second partition region.
As a preferred embodiment, an anode reaction zone flow field is arranged in the middle of each anode zone unit; one end of the anode region unit is provided with an anolyte inlet and a catholyte inlet, and the other end is provided with an anolyte outlet and a catholyte outlet; the anolyte inlet and the catholyte outlet are arranged opposite to each other, and the anolyte inlet and the catholyte outlet are both arranged close to the first partition; and the flow field of the anode reaction zone is respectively communicated with the anode electrolyte inlet and the anode electrolyte outlet.
As a preferred embodiment, a cathode reaction zone flow field is arranged in the middle of each cathode zone unit, and the cathode reaction zone flow field and the anode reaction zone flow field are arranged in opposite directions; and the flow field of the cathode reaction zone is respectively communicated with the catholyte inlet and the catholyte outlet.
As a preferred embodiment, seal grooves are formed on the outer sides of the anode reaction zone flow field, the anolyte inlet, the catholyte inlet, the anolyte outlet, the catholyte outlet and the cathode reaction zone flow field; every all be provided with the sealing strip in the seal groove, the sealing strip with seal groove looks adaptation sets up.
As a preferred embodiment, the anode reaction zone flow field and the cathode reaction zone flow field are formed by alternately arranging runner ridges and runner grooves.
As a preferred embodiment, the electrode plate body is a titanium electrode plate body or a titanium alloy electrode plate body with a coating on the surface; the material of the coating is at least one of gold, platinum or N i/Cr-C; the sealing strip is a rubber sealing strip.
In another aspect, embodiments of the present invention also provide a hydrogen production structure including a first end plate (i.e., a front end plate), a stack body, a second end plate (i.e., a rear end plate), an inlet manifold, and an outlet manifold; the first end plate, the stacking body and the second end plate are sequentially stacked, the first end plate and the second end plate are fixedly connected through a plurality of fastening screws, and the fastening screws are uniformly arranged on the outer side of the stacking body;
The inlet manifold and the outlet manifold are respectively arranged on the side surface of the first end plate, which is far away from the stacking body, and the inlet manifold and the outlet manifold are respectively communicated with the stacking body; the stack body includes the plate having multiple reaction regions.
As a preferred embodiment, the inlet manifold comprises an anolyte inlet manifold and a catholyte inlet manifold;
The anolyte inlet manifold comprises an anode inlet manifold and an anode inlet branch pipe, the anode inlet manifold is communicated with the anode inlet branch pipe, and the anode inlet manifold is perpendicular to the anode inlet branch pipe; two ends of the anode inlet branch pipe are respectively communicated with an anode electrolyte inlet of the anode region unit;
The catholyte inlet manifold comprises a cathode inlet manifold and a cathode inlet branch pipe, the cathode inlet manifold is communicated with the cathode inlet branch pipe, and the cathode inlet manifold is perpendicular to the cathode inlet branch pipe; and two ends of the cathode inlet branch pipe are respectively communicated with the catholyte inlet of the cathode region unit.
As a preferred embodiment, the outlet manifolds include an anolyte outlet manifold and a catholyte outlet manifold;
The anode electrolyte outlet manifold comprises an anode outlet main pipe and an anode outlet branch pipe, the anode outlet main pipe is communicated with the anode outlet branch pipe, and the anode outlet main pipe is perpendicular to the anode outlet branch pipe; two ends of the anode outlet branch pipe are respectively communicated with an anode electrolyte outlet of the anode region unit;
The catholyte outlet manifold comprises a cathode outlet header pipe and a cathode outlet branch pipe, the cathode outlet header pipe is communicated with the cathode outlet branch pipe, and the cathode outlet header pipe is perpendicular to the cathode outlet branch pipe; and two ends of the cathode outlet branch pipe are respectively communicated with the catholyte outlet of the cathode region unit.
As a preferred embodiment, the stacking body includes a first current collecting plate (i.e., a front current collecting plate), a slot core, and a second current collecting plate (i.e., a rear current collecting plate) stacked in order, the first current collecting plate being abutted to the first end plate, the second current collecting plate being abutted to the second end plate;
the groove core comprises a plurality of membrane electrodes and polar plates with multiple reaction areas, wherein the membrane electrodes and the polar plates are alternately arranged;
The membrane electrode comprises a reaction zone and a membrane electrode sealing frame arranged at the periphery of the reaction zone; one side surface of the reaction zone is a cathode gas diffusion layer, and the other side surface is an anode gas diffusion layer; the cathode gas diffusion layer is disposed adjacent to the cathode region of the plate having multiple reaction regions, and the anode gas diffusion layer is disposed adjacent to the anode region of the plate having multiple reaction regions.
As a preferred embodiment, the cathode gas diffusion layer comprises at least two cathode gas diffusion layer units, and the cathode gas diffusion layer units are arranged in one-to-one correspondence with the cathode region units;
the anode gas diffusion layer comprises at least two anode gas diffusion layer units, and the anode gas diffusion layer units are arranged in one-to-one correspondence with the anode region units.
As a preferred embodiment, the cathode gas diffusion layer is a diffusion layer made of at least one of carbon paper, titanium felt, titanium foam, sintered titanium or titanium mesh; the anode gas diffusion layer is a diffusion layer prepared from at least one of titanium felt, foam titanium or sintered titanium; the membrane electrode sealing frame is made of at least one of PEN (polyethylene naphthalate), PI (polyimide), PPS (polyphenylene sulfide) or PEEK (polyether ether ketone).
As a preferred embodiment, the inlet manifold, the outlet manifold and the first end plate are all adapted to the slot core. For example, the inlet manifold, the outlet manifold and the first end plate are respectively provided with electrolyte inlets and electrolyte outlets which are matched with the tank core, the number and the size of the electrolyte inlets are respectively matched with the number and the size of the electrolyte inlets of the tank core, and the number and the size of the electrolyte outlets are respectively matched with the number and the size of the electrolyte outlets of the tank core.
Compared with the prior art, the application has the following technical effects:
(1) The polar plate with multiple reaction areas and the hydrogen production structure are adopted, so that the area of the reaction area is conveniently expanded, and the area of the reaction area of the single-chip battery is larger. Compared with the traditional single-reaction-area polar plate and hydrogen production structure, the structure of the application avoids the preparation difficulty of large-area proton membranes and membrane electrodes, and has more advantages for the hydrogen production structure with high hydrogen yield.
(2) Compared with the traditional multi-electrolytic tank parallel assembly scheme and the high-area single-reaction-area electrolytic tank, the hydrogen production structure has the advantages of higher stability and better sealing effect.
(3) The hydrogen production structure adopts the design of horizontally distributing the liquid inlet of the end plate manifold, so that the distribution of the electrolyte is more uniform, and the voltage and reaction consistency of the monolithic structure can be effectively improved.
(4) The application has the advantages of exquisite overall structure design, high integration level, stable electrolyte circulation and high electrolysis efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an anode region of a plate with multiple reaction regions according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the cathode region of the anode region of the plate of FIG. 1 having multiple reaction regions;
FIG. 3 is a schematic view of the overall structure of a hydrogen production structure according to another embodiment of the present application;
FIG. 4 is an exploded view of the hydrogen-producing structure of FIG. 3;
FIG. 5 is a schematic perspective view of the inlet manifold of FIG. 4;
fig. 6 is a schematic structural view of a membrane electrode of the cell core of fig. 4.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, top, bottom … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Specifically, on one hand, as shown in fig. 1 to 2, an embodiment of the present invention provides a polar plate with multiple reaction areas, including a polar plate body 10, where one side surface of the polar plate body 10 is set as an anode area 11, and the other side surface is set as a cathode area 12;
The anode region 11 includes at least two anode region units 111 connected; each of the anode region units 111 is independent of each other and symmetrically arranged; the two anode region units 111 are connected by a first partition 112;
the cathode region 12 includes at least two connected cathode region units 121; each of the cathode region units 121 is independent of each other and symmetrically arranged; the two cathode region units 121 are connected by a second partition 122.
As a preferred embodiment, an anode reaction zone flow field a is provided at the middle of each of the anode region units 111; one end of the anode region unit 111 is provided with an anolyte inlet B and a catholyte inlet C, and the other end is provided with an anolyte outlet D and a catholyte outlet E; the anolyte inlet B and the catholyte outlet E are disposed opposite to each other, and both the anolyte inlet B and the catholyte outlet E are disposed close to the first partition 112; the anode reaction zone flow field A is respectively communicated with the anode electrolyte inlet B and the anode electrolyte outlet D.
As a preferred embodiment, a cathode reaction zone flow field F is disposed in the middle of each cathode area unit 121, and the cathode reaction zone flow field F is disposed opposite to the anode reaction zone flow field a; and the cathode reaction zone flow field F is respectively communicated with the catholyte inlet C and the catholyte outlet E.
As a preferred embodiment, seal grooves H are formed on the outer sides of the anode reaction zone flow field a, the anolyte inlet B, the catholyte inlet C, the anolyte outlet D, the catholyte outlet E and the cathode reaction zone flow field F; sealing strips (not marked in the figure) are arranged in each sealing groove H, and the sealing strips are arranged in a matched mode with the sealing grooves H.
As a preferred embodiment, the anode reaction zone flow field a and the cathode reaction zone flow field F are formed by alternately arranging flow channel ridges (not labeled in the figure) and flow channel grooves (not labeled in the figure).
As a preferred embodiment, the plate body 10 is a titanium plate body or a titanium alloy plate body with a coating (not labeled in the figure) provided on the surface thereof; specifically, in the present embodiment, the electrode plate body 10 is a titanium electrode plate body provided with a coating on the surface. The material of the coating is at least one of gold, platinum or N i/Cr-C; specifically, in the present embodiment, the coating is a corrosion-resistant Pt coating. The sealing strip is a rubber sealing strip.
The polar plate can effectively reduce the requirement of the proton membrane area, and can realize the requirements of high power and high hydrogen yield of the electrolytic cell by a scheme of combining a plurality of reaction areas and a small-area proton membrane, and can effectively ensure the uniformity of the proton membrane thickness, thereby ensuring the consistency and the safety of the reaction of each single cell of the electrolytic cell.
In another aspect, as shown in fig. 3-6, embodiments of the present invention also provide a hydrogen production structure including a first end plate 100 (i.e., front end plate), a stack body 200, a second end plate 300 (i.e., rear end plate), an inlet manifold 400, and an outlet manifold 500; the first end plate 100, the stacking body 200 and the second end plate 300 are sequentially stacked, the first end plate 100 and the second end plate 300 are fixedly connected through a plurality of fastening screws 600, and a plurality of fastening screws 600 are uniformly arranged on the outer side of the stacking body 200;
The inlet manifold 400 and the outlet manifold 500 are respectively disposed on the side of the first end plate 100 away from the stack body 200, and the inlet manifold 400 and the outlet manifold 500 are respectively disposed in communication with the stack body 200; the stack body 200 includes the plate having multiple reaction regions.
As a preferred embodiment, the inlet manifold 400 includes an anolyte inlet manifold 401 and a catholyte inlet manifold 402;
the anolyte inlet manifold 401 includes an anode inlet manifold 4011 and an anode inlet branch 4012, the anode inlet manifold 4011 is disposed in communication with the anode inlet branch 4012, and the anode inlet manifold 4011 is perpendicular to the anode inlet branch 4012; both ends of the anode inlet branch pipe 4012 are respectively communicated with an anolyte inlet B of the anode region unit 111;
The catholyte inlet manifold 402 comprises a cathode inlet manifold 4021 and a cathode inlet manifold 4022, the cathode inlet manifold 4021 is arranged in communication with the cathode inlet manifold 4022, and the cathode inlet manifold 4021 is perpendicular to the cathode inlet manifold 4022; both ends of the cathode inlet manifold 4022 are respectively disposed in communication with the catholyte inlet C of the cathode region unit 121.
By the arrangement, the inlet manifold can realize horizontal distribution of liquid inlet, so that the distribution of electrolyte is more uniform, and the voltage and reaction consistency of the monolithic structure can be effectively improved.
As a preferred embodiment, the outlet manifold 500 includes an anolyte outlet manifold 501 and a catholyte outlet manifold 502;
The anode electrolyte outlet manifold comprises an anode outlet main pipe and an anode outlet branch pipe, the anode outlet main pipe is communicated with the anode outlet branch pipe, and the anode outlet main pipe is perpendicular to the anode outlet branch pipe; two ends of the anode outlet branch pipe are respectively communicated with an anode electrolyte outlet of the anode region unit;
The catholyte outlet manifold comprises a cathode outlet header pipe and a cathode outlet branch pipe, the cathode outlet header pipe is communicated with the cathode outlet branch pipe, and the cathode outlet header pipe is perpendicular to the cathode outlet branch pipe; and two ends of the cathode outlet branch pipe are respectively communicated with the catholyte outlet of the cathode region unit.
In the embodiment of the present application, the outlet manifold 500 has the same structure as the inlet manifold 400.
As a preferred embodiment, the stack body 200 includes a first current collecting plate 201 (i.e., a front current collecting plate), a slot core 202, and a second current collecting plate 203 (i.e., a rear current collecting plate) stacked in this order, the first current collecting plate 201 being abutted against the first end plate 100, and the second current collecting plate 203 being abutted against the second end plate 300;
The cell 202 comprises a plurality of membrane electrodes 2021 which are alternately arranged and the polar plate with multiple reaction areas;
The membrane electrode 2021 comprises a reaction zone 2021A and a membrane electrode sealing frame 2021B arranged on the periphery of the reaction zone 2021A; one side of the reaction region 2021A is a cathode gas diffusion layer, and the other side is an anode gas diffusion layer; the cathode gas diffusion layer is disposed adjacent to the cathode region of the plate having multiple reaction regions, and the anode gas diffusion layer is disposed adjacent to the anode region of the plate having multiple reaction regions.
As a preferred embodiment, the cathode gas diffusion layer comprises at least two cathode gas diffusion layer units, and the cathode gas diffusion layer units are arranged in one-to-one correspondence with the cathode region units;
the anode gas diffusion layer comprises at least two anode gas diffusion layer units, and the anode gas diffusion layer units are arranged in one-to-one correspondence with the anode region units.
As a preferred embodiment, the cathode gas diffusion layer is a diffusion layer made of at least one of carbon paper, titanium felt, titanium foam, sintered titanium or titanium mesh; the anode gas diffusion layer is a diffusion layer prepared from at least one of titanium felt, foam titanium or sintered titanium; the membrane electrode sealing frame is made of at least one of PEN (polyethylene naphthalate), PI (polyimide), PPS (polyphenylene sulfide) or PEEK (polyether ether ketone). The materials of the cathode gas diffusion layer, the anode gas diffusion layer and the membrane electrode sealing frame can be selected according to actual needs, specifically, in this embodiment, the cathode gas diffusion layer and the anode gas diffusion layer are made of titanium felt, the surface coating of the titanium felt is Pt, and the membrane electrode sealing frame is PEN.
As a preferred embodiment, the inlet manifold, the outlet manifold and the first end plate are all adapted to the slot core. For example, the inlet manifold, the outlet manifold and the first end plate are respectively provided with electrolyte inlets and electrolyte outlets which are matched with the tank core, the number and the size of the electrolyte inlets are respectively matched with the number and the size of the electrolyte inlets of the tank core, and the number and the size of the electrolyte outlets are respectively matched with the number and the size of the electrolyte outlets of the tank core.
When the hydrogen production structure is used for hydrogen production, electrolysis water enters from the anode electrolyte inlet manifold, enters into two main channels through horizontal distribution, enters into the inlets of the anode sides of each polar plate from the main channels respectively, enters into two reaction areas, and is uniformly distributed to the reaction areas under the limitation of ridges and grooves of a flow field. The electrolysis water finally enters the main outlet channel from the electrolyte outlet, and then is collected to the anode electrolyte outlet manifold and is discharged from the manifold port.
Meanwhile, the electrolysis water enters from a cathode electrolyte inlet manifold, enters into two main channels through horizontal distribution, enters into the inlets of the cathode sides of each polar plate from the main channels respectively, then enters into two reaction areas, and is uniformly distributed to the reaction areas under the limitation of ridges and grooves of a flow field. The electrolysis water finally enters the outlet main channel from the electrolyte outlet, is collected to the anode electrolyte outlet manifold, and is discharged from the manifold outlet.
Applying voltage on two sides of the polar plate, generating oxygen evolution reaction on the anode side, generating oxygen, and discharging the oxygen and electrolyte from the outlet of the manifold; the cathode side generates hydrogen evolution reaction to generate hydrogen, and the hydrogen and electrolyte are discharged from an outlet of the manifold.
In actual operation, the cathode side can be blocked without water, and only the cathode of the inlet manifold is required to be blocked, so that the generated hydrogen is discharged from the outlet of the cathode manifold.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The polar plate with the multiple reaction areas is characterized by comprising a polar plate body, wherein one side surface of the polar plate body is provided with an anode area, and the other side surface of the polar plate body is provided with a cathode area;
The anode region comprises at least two anode region units connected with each other; each anode region unit is independent and symmetrically arranged; the two anode region units are connected through a first separation region;
the cathode region comprises at least two connected cathode region units; each cathode region unit is independent and symmetrically arranged; the two cathode region units are connected through a second partition region.
2. The plate with multiple reaction zones according to claim 1, wherein an anode reaction zone flow field is provided in the middle of each anode zone unit; one end of the anode region unit is provided with an anolyte inlet and a catholyte inlet, and the other end is provided with an anolyte outlet and a catholyte outlet; the anolyte inlet and the catholyte outlet are arranged opposite to each other, and the anolyte inlet and the catholyte outlet are both arranged close to the first partition; and the flow field of the anode reaction zone is respectively communicated with the anode electrolyte inlet and the anode electrolyte outlet.
3. The plate with multiple reaction regions according to claim 2, wherein a cathode reaction region flow field is provided in the middle of each of the cathode region units, the cathode reaction region flow field being disposed opposite to the anode reaction region flow field; and the flow field of the cathode reaction zone is respectively communicated with the catholyte inlet and the catholyte outlet.
4. The plate with multiple reaction zones of claim 3, wherein seal grooves are provided on the outer sides of the anode reaction zone flow field, the anolyte inlet, the catholyte inlet, the anolyte outlet, the catholyte outlet, and the cathode reaction zone flow field; sealing strips are arranged in each sealing groove, and the sealing strips are arranged in a matching way with the sealing grooves;
The anode reaction zone flow field and the cathode reaction zone flow field are formed by alternately arranging runner ridges and runner grooves;
the electrode plate body is a titanium electrode plate body or a titanium alloy electrode plate body with a coating on the surface; the material of the coating is at least one of gold, platinum or Ni/Cr-C; the sealing strip is a rubber sealing strip.
5. A hydrogen production structure comprising a first end plate, a stacked body, a second end plate, an inlet manifold, and an outlet manifold; the first end plate, the stacking body and the second end plate are sequentially stacked, the first end plate and the second end plate are fixedly connected through a plurality of fastening screws, and the fastening screws are uniformly arranged on the outer side of the stacking body;
the inlet manifold and the outlet manifold are respectively arranged on the side surface of the first end plate, which is far away from the stacking body, and the inlet manifold and the outlet manifold are respectively communicated with the stacking body; the stacked body includes the plate with multiple reaction regions of any one of claims 1 to 4.
6. The hydrogen-producing structure of claim 5, wherein the inlet manifold comprises an anolyte inlet manifold and a catholyte inlet manifold;
The anolyte inlet manifold comprises an anode inlet manifold and an anode inlet branch pipe, the anode inlet manifold is communicated with the anode inlet branch pipe, and the anode inlet manifold is perpendicular to the anode inlet branch pipe; two ends of the anode inlet branch pipe are respectively communicated with an anode electrolyte inlet of the anode region unit;
The catholyte inlet manifold comprises a cathode inlet manifold and a cathode inlet branch pipe, the cathode inlet manifold is communicated with the cathode inlet branch pipe, and the cathode inlet manifold is perpendicular to the cathode inlet branch pipe; and two ends of the cathode inlet branch pipe are respectively communicated with the catholyte inlet of the cathode region unit.
7. The hydrogen-producing structure of claim 6, wherein the outlet manifold comprises an anolyte outlet manifold and a catholyte outlet manifold;
The anode electrolyte outlet manifold comprises an anode outlet main pipe and an anode outlet branch pipe, the anode outlet main pipe is communicated with the anode outlet branch pipe, and the anode outlet main pipe is perpendicular to the anode outlet branch pipe; two ends of the anode outlet branch pipe are respectively communicated with an anode electrolyte outlet of the anode region unit;
The catholyte outlet manifold comprises a cathode outlet header pipe and a cathode outlet branch pipe, the cathode outlet header pipe is communicated with the cathode outlet branch pipe, and the cathode outlet header pipe is perpendicular to the cathode outlet branch pipe; and two ends of the cathode outlet branch pipe are respectively communicated with the catholyte outlet of the cathode region unit.
8. The hydrogen production structure of claim 7, wherein the stack body comprises a first current collector, a trough core, and a second current collector stacked in sequence, the first current collector abutting the first end plate, the second current collector abutting the second end plate;
the groove core comprises a plurality of membrane electrodes and polar plates with multiple reaction areas, wherein the membrane electrodes and the polar plates are alternately arranged;
The membrane electrode comprises a reaction zone and a membrane electrode sealing frame arranged at the periphery of the reaction zone; one side surface of the reaction zone is a cathode gas diffusion layer, and the other side surface is an anode gas diffusion layer; the cathode gas diffusion layer is disposed adjacent to the cathode region of the plate having multiple reaction regions, and the anode gas diffusion layer is disposed adjacent to the anode region of the plate having multiple reaction regions.
9. The hydrogen production structure according to claim 5, wherein the cathode gas diffusion layer includes at least two cathode gas diffusion layer units, the cathode gas diffusion layer units being disposed in one-to-one correspondence with the cathode region units;
the anode gas diffusion layer comprises at least two anode gas diffusion layer units, and the anode gas diffusion layer units are arranged in one-to-one correspondence with the anode region units.
10. The hydrogen production structure according to claim 9, wherein the cathode gas diffusion layer is a diffusion layer made of at least one of carbon paper, titanium felt, titanium foam, sintered titanium, or titanium mesh; the anode gas diffusion layer is a diffusion layer prepared from at least one of titanium felt, foam titanium or sintered titanium; the membrane electrode sealing frame is made of at least one of PEN, PI, PPS and PEEK;
the inlet manifold, the outlet manifold and the first end plate are all arranged in a matched mode with the groove core.
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| CN202410218753.3A CN118028860A (en) | 2024-02-28 | 2024-02-28 | Polar plate with multiple reaction areas and hydrogen production structure |
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| CN202410218753.3A CN118028860A (en) | 2024-02-28 | 2024-02-28 | Polar plate with multiple reaction areas and hydrogen production structure |
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