WO2019228616A1 - Empilement de cellules pem - Google Patents

Empilement de cellules pem Download PDF

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Publication number
WO2019228616A1
WO2019228616A1 PCT/EP2018/064113 EP2018064113W WO2019228616A1 WO 2019228616 A1 WO2019228616 A1 WO 2019228616A1 EP 2018064113 W EP2018064113 W EP 2018064113W WO 2019228616 A1 WO2019228616 A1 WO 2019228616A1
Authority
WO
WIPO (PCT)
Prior art keywords
pem
cell stack
end plate
lining
pem cell
Prior art date
Application number
PCT/EP2018/064113
Other languages
German (de)
English (en)
Inventor
Stefan Höller
Original Assignee
Hoeller Electrolyzer Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoeller Electrolyzer Gmbh filed Critical Hoeller Electrolyzer Gmbh
Priority to PCT/EP2018/064113 priority Critical patent/WO2019228616A1/fr
Publication of WO2019228616A1 publication Critical patent/WO2019228616A1/fr

Links

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
    • 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
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • 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
    • C25B9/70—Assemblies comprising two or more cells
    • C25B9/73—Assemblies comprising two or more cells of the filter-press type
    • C25B9/77—Assemblies comprising two or more cells of the filter-press type having diaphragms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M2008/1095—Fuel cells with polymeric electrolytes
    • 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
    • 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
    • Y02E60/50—Fuel cells

Definitions

  • the invention relates to a PEM cell stack according to the features specified in the preamble of claim 1.
  • PEM cell flocks are state of the art in numerous design variants. These are either cell felts of fuel cells, in which fuel, for example, waterfrat kata lytically oxidized ⁇ and thereby generate electrical energy ⁇ or to cell fills in which by means of electrical energy, a chemical decomposition, such as cell stacks of PEM electrolysis cells, which serve for the electrolytic splitting of water by means of electricity into hydrogen and oxygen. All cell stacks in common is the basic structure of the cells in which a proton exchange membrane (PEM) also referred to as a polymer electrolyte membrane, between tween a cathode and an anode is arranged, with a lot of such cells is clamped adjacent to each other between two end plates.
  • PEM proton exchange membrane
  • one of the end plates typically serves exclusively for mechanical fastening while the other fluid connections have the function ⁇ , ie for an electrolysis stack of the type initially mentioned, a connection for supplying distilled or at least demineralized water, a connection for discharging oxygen and water, and a port for discharging the generated hydrogen.
  • the cell stack has two electrical cal connections for applying a DC electrical voltage.
  • the cell stacks are made up of PEM membrane electrode units, which abut each other via a bipolar plate and electrically connected to each other. It is the state of the art to produce the titanium bipolar plates, as well as the end plates with the connections to ensure that within the cell stack, the construction parts are not attacked by the aggressive media, especially the demineralized water. Long-term tests have shown that even high-alloyed stainless steel is attacked by these media. Therefore, at least in the area of the cell stack, these very cost-intensive components made of titanium or a tifan alloy are used.
  • the invention has the object zugrun de, a PEM cell stack of the aforementioned Ar ⁇ form so that the aforementioned disadvantages are avoided, in particular ei ne cost-effective production while avoiding mögli cher corrosion to ensure.
  • the PEM cell stack is in particular an Elekfrolysesfack for the electrolytic splitting of water by means of electricity in hydrogen and oxygen, but it may also be a fuel cell stack or an electrolysis stack for Aufspal tion of other substances such. As methanol act.
  • the PEM cell stack has a plurality of stacked electrochemical PEM cells stacked between two end plates. According to the invention, at least one of the end plates is formed of an iron or aluminum-containing metal, wherein the at least one Endplat te is lined on its side facing the PEM cells side with a chemically iner th material.
  • the basic idea of the solution according to the invention is to produce at least one, preferably both end plates from a more costly material than the titanium used otherwise, but to line this material with a chemically inert material in order to make contact with the fluids entering or leaving the stack to avoid with the metal of the end plate.
  • the Fier einssch of the PEM cell stack can be significantly reduced compared to those with existing titanium end plates without loss of strength.
  • the lining with a chemically inert material protects the incoming or outgoing media from coming into contact with the metal of this end plate.
  • Iron- or aluminum-containing metal means such a metal, which is available as an end-plate component at a low cost. It does not necessarily have to be an iron or aluminum alloy. If necessary, another cost-effective metallic material may also be used here.
  • the at least one end plate on at least one fluid connection, said at least one fluid connection and an optionally IN ANY and the fluid connection towards leading channel within the end plate inside are also lined with the inert material.
  • Flier notebook it is possible to integrate the or the fluid connections in the metalli cal component of the end plate, wherein the lining with the inert material ensures that even within the supply the channel or the connection no fluid with the metallic material of the end plate in Touch comes.
  • At least one of the end plates is advantageous, preferably both end plates are formed from cast metal.
  • Such cast components have a high strength at low production costs, high-strength structures can be formed with only a small amount of mechanical post-processing.
  • Particularly preferred for such end plates is ductile iron, but alternatively sintered components or components produced in 3D printing can also be used.
  • such an end plate is a
  • the lining material is not only chemically inert but also electrically insulating. This has the considerable advantage that there is no electrical connection between the titanium components in the cell stack or other metal-coated components to the line connections, to which typically connect stainless steel cables. On In this way, the formation of local elements that arise through the electrical cal conductive connection of components different Elektronega tivity can be avoided. While these leads are electrically connected to a lead terminal of the endplate, the endplate itself is insulated over the electrically-insulating lining material over the metallic components within the PEM cell stack.
  • the PEM cell stack is formed by PEM cells, each having a PEM membrane electrode unit and clamped between the end plates ⁇ .
  • adjacent adjacent electrode units are separated by a bipolar plate and electrically conductively connected to each other.
  • These bipolar plates are advantageously made of titanium or a titanium alloy.
  • Polytetrafluoroethylene (PTFE) or a material made of a perfluoroalkoxy polymer can advantageously be used as the inert lining material
  • PFA polyvinylidene fluoride
  • PVD polyvinylidene fluoride
  • the chemically inert material lining should cover the entire area from the cell stack facing side of the endplate over any channels present to the end of the ports be lined out.
  • Such a complete lining takes place advantageously by injection molding, whereby at the end plate can form part of the injection mold, which is manufacturing technology advantageous.
  • dovetail guides in the area of a fluid connection between the end plate and the lining as positive locking means, which are filled with lining workpieces during the injection molding process and thus connected to the end plate in a practically non-detachable manner.
  • Layer thickness between 0.01 and 10 mm, the lower limit is formed by coatings and the upper limit by a plastic injection molded component. Layer thicknesses between 2 and 5 mm have proved to be advantageous in practice. These layer thicknesses ensure th a sufficient tightness and stability and are relatively robust against external, especially mechanical influences.
  • FIG. 1 is a highly schematic and simplified illustration of a PEM electrolysis bag for the electrolytic splitting of water by means of electricity into hydrogen and oxygen in a simplified circuit arrangement
  • FIG. 2 shows the electrolysis bag of FIG. 1 in an enlarged view in side view
  • FIG. 3 in a further enlarged and sectional view of the electrolyte sestack of Figure 2 in the region of a terminal.
  • Fig. 4 in a further enlarged sectional view of a Ausklei tion of the end plate in the region of a terminal.
  • the basic structure of a device for generating hydrogen and oxygen from water is illustrated with reference to FIG. From a Wasservorrafsbereheatlfer 1, in which demineralized What water is befindlich, is supplied by means of a pump 2 an electrolysis bag 3 of the PEM type water. A Wasserzuschreibderifung 4 is connected to a Leifungsan gleich 5 of Elektrolysesfacks 3. The lead terminal 5 is arranged within an end plate 6, in which a further lead terminal 7 is arranged, to which a lead (not shown) is connected, which is provided for removing the hydrogen generated within the stack 3.
  • a line connection 8 is provided within the end plate 6, on which a Line 9 subsequent ⁇ , with which the oxygen generated in the stack 3 as the excess water again fed to the water reservoir 1, where the oxygen is separated and released into the open or about optionally provided there a catching device for further use.
  • FIGS. 2 and 3 The structure of the electrolysis stack 3 is shown in FIGS. 2 and 3. He has ⁇ a plurality of PEM cells in the form of PEM membrane electrode units 10, which are arranged in each case with inclusion of a bipolar plate 1 1 in a stack abutting ⁇ , wherein at the end of the stack, a connection plate 12 of the end plate 6 adjacent and at the other end, a terminal plate 13, the other end plate 14 adjacently arrange ⁇ are.
  • the terminal plate 12 is provided for connection with a negative potential and the connection plate 13 for connection to a positive potential of a DC power source.
  • the cells 10 with the interposed to ordered bipolar plates 1 1 and the respective ends of the stack arranged connection plates 12 and 13 are clamped between the Endplat th 6 and 14, this are provided in the corners of the stack Weran ker 15 which by screws 1 6 with Nuts 1 7 are formed.
  • the end plate 14 has a lining 20 which is arranged between the end plate 14 and the adjacent bipolar plate 1 1 or terminal plate 13 and care ⁇ that the be ⁇ from ductile iron standing end plate 14 relative to the stack is electrically insulated ⁇ and do not come in contact with the demineralized water circulating in the stack 3 or the oxygen and hydrogen gases produced there ⁇ .
  • the lining 20 is formed by a plate made of polytetrafluoroethylene, which need not be connected to the end plate 14 ⁇ , but only so interpreted that it completely cover the stack side of the end plate 14 ⁇ , so that an electrical cal Insulation is provided towards the stack and it is ensured that the media in the stack do not come into contact with the end plate 14.
  • This lining 21, as shown in FIG. 3 clarifies ⁇ , positively the be ⁇ nodular cast iron component, which includes the end plate 6, the line terminals 5, 7 and 8 and the channels 21, ⁇ affiliated, ie captively connected to this component.
  • the lining is designed so that they completely cover the end plate 16 on its side facing the stack ⁇ and beyond the interior of the channels 21 to the connections to 5, 7 and 8. As the illustration of FIG.
  • ⁇ is the lining 22, which here also consist of polytetrafluoroethylene ⁇ , flange led out over the inner contour of the channel 21 ⁇ .
  • the lining is produced by injection molding ⁇ , wherein the end plate 6 comprehensive casting component is part of the tool, so the part umsprifz ⁇ has been.
  • FIG. 4 Based on Fig. 4 is shown by way of example, as part of the closing plate 6 comprehensive casting construction part of the lining 22 and an even more intense form-fitting Ver bund hergesteil ⁇ can be by other positive locking means.
  • dovetail-shaped recesses in the cast component vorgese hen in which the lining 22 forming material is injected ⁇ , the so after cooling an intimate and quasi indissoluble bond with the metal component eing ⁇ .

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Sustainable Energy (AREA)
  • Sustainable Development (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

L'invention concerne un empilement d'électrolyse (3) pour la division électrolytique au moyen d'un courant en hydrogène et en oxygène qui comporte une pluralité de cellules PEM (10) électrochimiques empilées en un empilement (3) qui sont serrées entre deux plaques d'extrémité (6, 14). La ou les plaques d'extrémité (6) sont constituées d'un métal contenant du fer ou de l'aluminium et comportent sur leur face tournée vers les cellules PEM (10) un revêtement pourvu d'une matière chimiquement inerte, par exemple du PTFE, du PFA ou du PVDF.
PCT/EP2018/064113 2018-05-29 2018-05-29 Empilement de cellules pem WO2019228616A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/064113 WO2019228616A1 (fr) 2018-05-29 2018-05-29 Empilement de cellules pem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/064113 WO2019228616A1 (fr) 2018-05-29 2018-05-29 Empilement de cellules pem

Publications (1)

Publication Number Publication Date
WO2019228616A1 true WO2019228616A1 (fr) 2019-12-05

Family

ID=62486574

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/064113 WO2019228616A1 (fr) 2018-05-29 2018-05-29 Empilement de cellules pem

Country Status (1)

Country Link
WO (1) WO2019228616A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021155919A1 (fr) 2020-02-05 2021-08-12 Hoeller Electrolyzer Gmbh Procédé de fonctionnement d'un ensemble à empilement de cellules électrochimiques
WO2022233386A1 (fr) 2021-05-03 2022-11-10 Hoeller Electrolyzer Gmbh Empilement d'électrolyse de l'eau pour générer de l'hydrogène et de l'oxygène à partir d'eau
WO2023011714A1 (fr) 2021-08-04 2023-02-09 Hoeller Electrolyzer Gmbh Dispositif de production électrolytique de gaz

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62296369A (ja) * 1986-06-17 1987-12-23 Yamaha Motor Co Ltd 燃料電池の端板構造
US20040131917A1 (en) * 2002-08-13 2004-07-08 Mazza Antonio Gennaro End plate and method for producing same
US20100009231A1 (en) * 2008-07-09 2010-01-14 Samsung Electro-Mechanics Co., Ltd. Stack and fuel cell power generation system having the same
EP2608300A1 (fr) * 2011-12-21 2013-06-26 Belenos Clean Power Holding AG Ensemble de plaque terminale pour bloc de pile à combustible
US20180034091A1 (en) * 2016-07-26 2018-02-01 Toyota Jidosha Kabushiki Kaisha Fuel cell stack
KR20180023687A (ko) * 2016-08-26 2018-03-07 (주)엘켐텍 정류기 일체형 수전해 셀 및 수전해 스택

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62296369A (ja) * 1986-06-17 1987-12-23 Yamaha Motor Co Ltd 燃料電池の端板構造
US20040131917A1 (en) * 2002-08-13 2004-07-08 Mazza Antonio Gennaro End plate and method for producing same
US20100009231A1 (en) * 2008-07-09 2010-01-14 Samsung Electro-Mechanics Co., Ltd. Stack and fuel cell power generation system having the same
EP2608300A1 (fr) * 2011-12-21 2013-06-26 Belenos Clean Power Holding AG Ensemble de plaque terminale pour bloc de pile à combustible
US20180034091A1 (en) * 2016-07-26 2018-02-01 Toyota Jidosha Kabushiki Kaisha Fuel cell stack
KR20180023687A (ko) * 2016-08-26 2018-03-07 (주)엘켐텍 정류기 일체형 수전해 셀 및 수전해 스택

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021155919A1 (fr) 2020-02-05 2021-08-12 Hoeller Electrolyzer Gmbh Procédé de fonctionnement d'un ensemble à empilement de cellules électrochimiques
WO2022233386A1 (fr) 2021-05-03 2022-11-10 Hoeller Electrolyzer Gmbh Empilement d'électrolyse de l'eau pour générer de l'hydrogène et de l'oxygène à partir d'eau
WO2023011714A1 (fr) 2021-08-04 2023-02-09 Hoeller Electrolyzer Gmbh Dispositif de production électrolytique de gaz

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