CN114703494A - Positive electrode plate of PEM water electrolyzer - Google Patents
Positive electrode plate of PEM water electrolyzer Download PDFInfo
- Publication number
- CN114703494A CN114703494A CN202210343911.9A CN202210343911A CN114703494A CN 114703494 A CN114703494 A CN 114703494A CN 202210343911 A CN202210343911 A CN 202210343911A CN 114703494 A CN114703494 A CN 114703494A
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- flow channel
- anode plate
- pem water
- flow
- wedge
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000009826 distribution Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 25
- 238000005868 electrolysis reaction Methods 0.000 abstract description 14
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 206010001526 Air embolism Diseases 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
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- 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
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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 relates to the field of electrolysis, and specifically discloses a PEM water electrolyzer anode plate, including connecting in a plurality of bellying of polar plate one side, form the positive pole runner between the bellying, the polar plate is provided with exit flow channel and entry flow channel, exit flow channel and entry flow channel and positive pole runner intercommunication. The diffusion capacity of the reaction water is ensured, the transmission efficiency of the reaction water is improved, and the reaction water is uniformly distributed in the flow field, so that the effective reaction area is increased, and the electrolytic performance is improved.
Description
Technical Field
The application relates to the technical field of electrolysis, in particular to an anode plate of a PEM water electrolyzer.
Background
With the continuous development of world energy technology, hydrogen energy is expected by people all over the world due to the advantages of high efficiency and low pollution. The water electrolysis hydrogen production technology of Proton Exchange Membrane (PEM) is the focus technology of green hydrogen production at present. Its reaction principle is the reverse reaction of PEM fuel cell reaction, and uses proton membrane as electrolyte and pure water reactant, and is decomposed into O at anode2Proton H-and electron e-Proton H-Through the PEM to the cathode, where it reacts with the electrons e-Is combined into H2. The produced hydrogen has high purity and large pressure regulation range, and the output pressure of the hydrogen can reach several megapascals, thereby being suitable for the input of rapidly-changed renewable energy power. Therefore, PEM water electrolysis hydrogen production is an effective path for future renewable energy storage.
At present, PEM water electrolysis has a plurality of technical problems, wherein the design of a bipolar plate and a flow field structure is one of the limiting factors influencing the gas production rate of an electrolytic cell. The anode side has a large amount of water and generated oxygen, and the limit problem of gas-liquid two-phase transmission is closely related to the gas production rate of the electrolytic cell, so that the design of an anode plate flow field structure with high-efficiency mass transfer is one of key technologies for improving the gas production rate of the electrolytic cell.
Disclosure of Invention
The invention aims to solve the problems, and provides an anode plate of a PEM water electrolyzer, which can ensure the diffusion capacity of reaction water during water electrolysis, improve the transmission efficiency of the reaction water and ensure that the reaction water is uniformly distributed in a flow field, thereby improving the effective reaction area and increasing the electrolytic performance.
The technical scheme is as follows:
the utility model provides an anode plate of PEM water electrolyser, includes the anode plate, connect in a plurality of bellying of polar plate one side, form the positive pole runner between the bellying, the polar plate is provided with export runner and entry runner, export runner and entry runner and positive pole runner intercommunication.
Furthermore, the convex parts of the anode flow channels are airfoil surfaces and are arranged in a matrix manner, and are provided with a flow dividing structure, a flow guiding structure and a flow converging structure;
furthermore, the shunting structure is provided with a wedge-shaped sharp angle which is arranged symmetrically along the incoming flow axial direction and is 60-90 degrees;
furthermore, the drainage structure is connected with the shunt structure and is in a convex arc shape, and the radian is 100-120 degrees;
furthermore, the confluence structure is connected with the drainage structure and has a wedge-shaped sharp angle, the wedge-shaped sharp angle is symmetrically arranged along the incoming flow axial direction, and the wedge-shaped sharp angle is 30-45 degrees;
further, the outermost axial position of the flow guide structure is at the front end of the end axial position of the adjacent lug boss confluence structure.
In summary, the present application at least includes the following beneficial technical effects:
1. the wedge-shaped sharp-horn-shaped flow distribution structure can efficiently disperse fluid, avoid the loss of flow velocity and pressure intensity, improve the uniformity of fluid distribution, increase the effective reaction area and improve the electrolysis efficiency.
2. The convex circular arc-shaped drainage structure reduces the occurrence of the motion states of stirring flow, vortex flow and the like which obstruct the inflow and the discharge of fluid, reduces the formation of gas embolism and ensures the smooth flow of reaction water.
3. The wedge-shaped closed-angle-shaped converging structure enables fluid to smoothly converge, avoids energy loss caused by collision and ensures efficient transmission of gas and liquid in the flow channel.
4. And the mode of back fluid inlet/outlet is adopted, so that the continuity of a sealing area is ensured, and the sealing property of the electrolytic cell is improved.
Drawings
FIG. 1 is a schematic diagram of an elevation view of an anode flow channel of a proton exchange membrane water electrolyzer in an embodiment of the invention;
FIG. 2 is a schematic rear view of an anode channel according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a protrusion according to an embodiment of the present invention.
Description of the reference numerals: 1. an inlet flow passage; 2. an anode flow channel; 3. an outlet flow passage; 4. water inlet holes 5 and water outlet holes; 6. a boss portion; 61. a flow splitting structure; 62. a drainage structure; 63. and a bus structure.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings and specific embodiments.
It should be noted that the experimental methods described in the following examples are conventional methods unless otherwise specified, and the reagents and materials described therein are commercially available; in the description of the present invention, the terms "upper", "lower", "top", "bottom", and the like indicate directions or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the illustrated devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 and fig. 2, the embodiment of the application discloses a PEM water electrolyzer anode plate, which comprises a plate, wherein a plurality of protrusions 6 are arranged in the plate, anode flow channels 2 are formed between the protrusions 6, the side of the plate opposite to the protrusions 6 is the back of the plate, and the back of the plate is provided with an outlet flow channel 3 and an inlet flow channel 1 which are communicated with the anode flow channels 2.
The polar plate is equipped with into water hole 4 and apopore 5, and the back of polar plate is all run through to 2 intercommunications with positive pole runner to in water hole 4 and apopore 5, and 2 and inlet flow channel 1 of inlet hole 4 intercommunication positive pole runner, apopore 5 intercommunication outlet flow channel 3 and inlet flow channel 1. The inlet channel 1 and the outlet channel 3 can be adjusted according to the actual situation. In this embodiment, the inlet flow channel 1 and the outlet flow channel 3 are symmetrically disposed on two opposite sides of the polar plate, and a direction in which the inlet flow channel 1 points to the outlet flow channel 3 is an incoming flow direction. During water electrolysis, reaction water passes through the water inlet hole 4 from the inlet flow channel 1 on the back of the polar plate to enter the anode flow channel 2 on the front of the polar plate, and is collected through the water outlet hole 5 after reaction to enter the outlet flow channel 3 on the back of the polar plate and flow out of the polar plate.
The bulge 6 is provided with a flow distribution structure 61, a flow guide structure 62 and a flow converging structure 63, wherein the flow distribution structure 61 is in a wedge-shaped sharp angle and is axially and symmetrically arranged along the incoming flow direction, and the wedge-shaped sharp angle of the flow distribution structure 61 is 90 degrees in the embodiment; the flow guiding structure 62 receives the flow dividing structure 61 along the incoming flow direction, and is in a convex arc shape, the axial position of the outermost side is at the front end of the axial position of the tail end of the flow converging structure 63 of the adjacent bulge part 6, and the radian is 113 degrees in the embodiment; the confluence structure 63 has a wedge-shaped sharp angle, accepts the drainage structure 62 along the incoming flow direction and is axially symmetrically arranged, the wedge-shaped sharp angle of the confluence structure 63 is 45 degrees in the embodiment, and the fluid confluence is higher under the angle.
As shown in fig. 3, the protruding portions 6 are distributed in multiple rows in the anode plate, the protruding portions 6 in each row of protruding portions 6 are uniformly distributed, two adjacent rows of protruding portions 6 are arranged in a staggered manner, two adjacent protruding portions 6 that sequentially pass through in the incoming flow direction are respectively a front row of protruding portions 6 and a rear row of protruding portions 6, and the top end of the flow dividing structure 61 of the rear row of protruding portions 6 extends beyond the outermost position of the flow guiding structure 62 of the front row of protruding portions 6 in the reverse direction of the incoming flow direction.
The airfoil matrix runner has three performances of flow distribution, flow guiding and flow converging, can efficiently disperse fluid, avoids the loss of flow velocity and pressure intensity, reduces the occurrence of motion states of stirring flow and the like which obstruct the inflow and the discharge of the fluid, reduces the formation of gas embolism, enables the fluid to smoothly converge at the same time, avoids energy loss caused by collision, ensures the efficient transmission of gas and liquid in the runner, improves the uniformity of fluid distribution, increases the effective reaction area and improves the electrolysis efficiency.
The protrusions 6 distributed in a wing surface matrix are provided with a flow dividing structure 61, a flow guiding structure 62 and a flow converging structure 63. The wedge-shaped sharp-horn-shaped flow dividing structure 61 can efficiently disperse fluid, avoid the loss of flow velocity and pressure intensity, improve the uniformity of fluid distribution, increase the effective reaction area and improve the electrolysis efficiency. The convex arc-shaped flow guide structure 62 is used for receiving the flow distribution structure 61, so that the occurrence of the motion states of stirring flow, vortex flow and the like which hinder the inflow and the discharge of fluid is reduced, the formation of gas embolism is reduced, and the smooth flow of reaction water is ensured. The wedge-shaped closed-angle-shaped converging structure 63 receives the drainage structure 62 along the same direction, so that the fluid is smoothly converged, the energy loss caused by collision is avoided, the efficient transmission of gas and liquid in the flow channel is ensured, and the comprehensive performance of the electrolytic cell is improved under the comprehensive action of three aspects.
The implementation principle of the application is as follows: when water electrolysis is carried out, reaction water is distributed through the inlet flow channel 1 at the top of the flow channel and then passes through the water inlet holes 4 to enter the airfoil matrix flow channel on the front surface of the polar plate. The flow dividing structure 61 of the airfoil matrix flow channel enables the flowing direction of the reaction water to be changed constantly, promotes the high-efficiency dispersion of the fluid, avoids the loss of the flow velocity and the pressure, is favorable for the rapid and uniform distribution of the reaction water in the flow field, improves the transmission efficiency of the reaction water, increases the effective reaction area and improves the electrolysis efficiency. When the water electrolysis reaction is carried out, oxygen generated by the anode continuously diffuses into the flow field and is gathered through the formation of bubbles, and a gas plug is formed at the tail end of the flow channel to block the flow channel in serious cases, so that the transmission of reaction water is influenced. The flow guide structure 62 of the airfoil matrix flow channel 2 reduces the occurrence of the motion states of stirring flow, vortex flow and the like which hinder the inflow and discharge of fluid, reduces the formation of gas embolism, and ensures the smooth flow of reaction water. The confluence structure 63 of the airfoil matrix flow channel 2 receives the drainage structure 62 along the same direction, so that the fluid is smoothly converged, the energy loss caused by impact is avoided, the efficient transmission of gas and liquid phases in the flow channel is ensured, and the electrolysis efficiency is improved.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (10)
1. A PEM water electrolyser anode plate, comprising: the anode flow channel structure comprises a plurality of protruding portions (6) connected into a polar plate, an anode flow channel (2) is formed between the protruding portions (6), the polar plate is provided with an outlet flow channel (3) and an inlet flow channel (1), and the outlet flow channel (3) and the inlet flow channel (1) are communicated with the anode flow channel (2).
2. The PEM water electrolyser anode plate of claim 1 wherein: bulge (6) are provided with reposition of redundant personnel structure (61), drainage structure (62) and converge structure (63), and reposition of redundant personnel structure (61) is the wedge closed angle, and the wedge closed angle of reposition of redundant personnel structure (61) is towards the incoming flow direction of entry runner (1) directional exit runner (3), and diversion structure (61) is accepted in drainage structure (62), is convex arc, and drainage structure (62) is accepted in converge structure (63), is the wedge closed angle.
3. The PEM water electrolyzer anode plate of claim 2, wherein: the flow dividing structure (61) is in a wedge-shaped sharp angle of 60-90 degrees.
4. The PEM water electrolyzer anode plate of claim 2, wherein: the radian of the drainage structure (61) is 100-120 degrees.
5. The PEM water electrolyzer anode plate of claim 2, wherein: the wedge-shaped sharp angle of the confluence structure (63) is 30-45 degrees.
6. The anode plate of a PEM water electrolyser of claim 5 wherein: the wedge-shaped sharp angle of the confluence structure (63) is 45 degrees.
7. The PEM water electrolyzer anode plate of claim 2, wherein: the convex parts (6) are arranged in multiple rows, the convex parts (6) in each row are uniformly distributed, and the convex parts (6) in two adjacent rows are arranged in a staggered mode.
8. The PEM water electrolyzer anode plate of claim 7, wherein: two adjacent bulges (6) which sequentially pass through in the incoming flow direction are respectively a front-row bulge (6) and a rear-row bulge (6), and the top end of a flow distribution structure (61) of the rear-row bulge (6) extends to exceed the outermost side of a flow guide structure (62) of the front-row bulge (6).
9. The PEM water electrolyzer anode plate of claim 1, wherein: the outlet flow channel (3) and the inlet flow channel (1) penetrate from the back of the anode plate to one side of the anode plate connecting lug boss (6).
10. The PEM water electrolyzer anode plate of claim 1, wherein: the outlet flow channel (3) and the inlet flow channel (1) are of rectangular groove structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210343911.9A CN114703494B (en) | 2022-03-31 | 2022-03-31 | Anode plate of PEM water electrolytic tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210343911.9A CN114703494B (en) | 2022-03-31 | 2022-03-31 | Anode plate of PEM water electrolytic tank |
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| Publication Number | Publication Date |
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| CN114703494A true CN114703494A (en) | 2022-07-05 |
| CN114703494B CN114703494B (en) | 2023-11-10 |
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| CN202210343911.9A Active CN114703494B (en) | 2022-03-31 | 2022-03-31 | Anode plate of PEM water electrolytic tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114792821A (en) * | 2022-04-30 | 2022-07-26 | 山东建筑大学 | Flow field plate of fuel cell |
| CN218372538U (en) * | 2022-08-26 | 2023-01-24 | 江苏民诺氢能源科技有限公司 | Anode plate for proton exchange membrane water electrolyzer |
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2022
- 2022-03-31 CN CN202210343911.9A patent/CN114703494B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106575776A (en) * | 2014-06-27 | 2017-04-19 | 努威拉燃料电池有限责任公司 | Flow fields for use with an electrochemical cell |
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| CN114703494B (en) | 2023-11-10 |
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