KR-102963076-B1 - electrolytic cell

KR102963076B1KR 102963076 B1KR102963076 B1KR 102963076B1KR-102963076-B1

Abstract

(i) Two metallic half-cells forming an anode chamber and a cathode chamber, (ii) an anode and a cathode arranged in each of the anode chamber and the cathode chamber, (iii) a separator membrane that separates two electrodes from each other, (iv) for each half-cell, at least one inlet and an outlet for the reactant and the product, and (v) optionally comprising or configured with spacers for positioning two electrodes within each electrode chamber, and An electrolytic cell is proposed in which two half-cells are connected across their periphery but are electrically insulated and have a wall thickness of 0.05 to 0.15 mm.

Inventors

루크, 빕케

Assignees

티센크루프 누세라 아게 운트 콤파니 카게아아

Dates

Publication Date: 20260508
Application Date: 20220120
Priority Date: 20210217

Claims (11)

(i) Two metallic half-cells forming an anode chamber and a cathode chamber, (ii) an anode and a cathode arranged in each of the anode chamber and the cathode chamber, (iii) a separator membrane that separates two electrodes from each other, (iv) for each half-cell, at least one inlet and an outlet for the reactant and the product, and (v) Each electrode chamber includes or is composed of spacers that flatly position the two electrodes on the separator membrane, and The above two half-cells are connected across their periphery but are electrically insulated and have a wall thickness of 0.05 to 0.15 mm, an electrolytic cell.
In Article 1, The above-mentioned half-batteries are electrolytic cells composed of one of stainless steel, nickel, or titanium, or an alloy of said nickel or said titanium.
In Article 1, The above spacers are resilient elements, electrolytic cells.
In any one of paragraphs 1 to 3, The above two metallic half-cells are connected across their periphery by an electrically insulated plastic material, an electrolytic cell.
In any one of paragraphs 1 to 3, The inlet and the outlet are spouts of plastic material, and the spouts are located at the joints between the two half-cells, an electrolytic cell.
In any one of paragraphs 1 to 3, Electrolytic cell subject to a low voltage of 0.5 to 0.15 bar.
(i) At least two electrolytic cells as described in claim 1, (ii) 2 pressure plates, and (iii) comprising or composed of at least two tension rods, Here (a) The two pressure plates are facing each other and are movably or rigidly separated by the at least two tension rods; (b) The at least two electrolytic cells are positioned or stacked relative to each other between the two pressure plates such that, in each case, the cathode rear wall of the first electrolytic cell contacts the anode rear wall of the subsequent electrolytic cell; and (c) Electrolysis stack, wherein the pressure plates are spaced apart from each other so as to have a fixed association with the at least two electrolytic cells.
In Article 7, An electrolysis stack comprising 2 to 150 electrolytic cells.
(i) providing at least two electrolytic cells as described in claim 1, (ii) the step of providing two pressure plates, and (iii) comprising or configured steps of providing at least two tension rods, and Here (a) Low voltage is applied to at least two of the above electrolytic cells; (b) The electrolytic cells to which the low voltage from step (a) is electrically connected in series in such a way that, in each case, the rear wall of the cathode of the first electrolytic cell comes into contact with the rear wall of the anode of the connected electrolytic cell; (c) The electrolytic cells connected in series according to step (b) are placed between the two pressure plates by the at least two tension rods so that a fixed association is formed; and (d) A method for generating an electrolytic stack in which the vacuum on the electrolytic cells of the fixed combination is released again.
An electrolysis stack comprising an electrolytic cell described in any one of claims 1 to 3.
In Article 2, The above alloy is an electrolytic battery containing additional foreign metals.

Description

electrolytic cell The present invention relates to the field of electrolysis technology, novel electrolytic cells, electrolysis stacks comprising such cells connected in series, a method for producing such stacks, and a use of the cells when producing the stacks. A greenhouse gas-free economy within the next 30 years—this is Europe's announced goal to combat climate change. Renewable energy replaces fossil fuels such as oil, coal, and gas. As part of the sustainable reform of the energy supply, hydrogen will play an important role. The efficient provision of electricity and heat for clean mobility—as a storage source to offset fluctuating renewable energy, as a standard for alternative fuels, or as an industrial process gas—is made possible because hydrogen is the most versatile energy carrier, can be used across sector boundaries, offers great potential for synergy, and has an energy density three times that of gasoline based on mass. Therefore, sustainably and economically produced hydrogen is a central component in addressing climate change by significantly reducing the emission of the harmful greenhouse gas CO2, particularly in the energy, transportation, and industrial sectors. Due to the numerous and diverse potential applications of hydrogen, the simultaneous development of a global, cross-sectoral hydrogen economy opens up tremendous opportunities for new technologies and business models. For the industrial sector, hydrogen-powered gas turbines are currently being explored. Fuel cells can be used in cars or buses. By using hydrogen, vehicles can not only operate without generating exhaust gases but, in contrast to electric vehicles, also cover long distances and rapidly refuel the vehicles. From an environmental perspective, the production of hydrogen by the electrolysis of water is particularly important; therefore, the term "green hydrogen" is also used in this context. This method is carried out in coupled electrolytic cells, known as so-called electrolyzers, as is also known from chlorine-alkali electrolysis. Related prior art An electrolytic cell comprising at least one pair of electrodes, namely a cathode and an anode, a current collector, and a housing including a membrane, is already known from US 5,599,430 B (DOW). It further comprises an electrically conductive, hydrostatically permeable resilient mattress disposed substantially coplanar with the current collector and in contact with the current collector on one side, and similarly extending coplanar with the electrode and in contact with the electrode on the other side. EP 1451389 B1 (UHDENORA) describes a current collector for electrochemical cells composed of a “sandwich” of compressible layers of metal wires and elastic layers, which imparts a predetermined mechanical load over a wide compression range. EP 1766104 B1 (UHDENORA) provides a conventional electrolytic cell having a sealing system composed of individual elements each comprising two electrodes separated from each other by membranes, wherein the ratio of the inert membrane area is minimized by a flange so that the ratio between the flange area of the half-shell and the active membrane area can be set to less than 0.045. According to EP 1882758 A1 (TOAGOSEI), the elastic pressure of the electrolytic cell is transmitted by coils or woven nickel mats or tough nickel alloys, and in the case of coils, the number of windings and in the case of mats, the number of overlapping layers are increased stepwise from top to bottom, ultimately increasing in the same direction on the anode side, thereby obtaining a pressure profile at least similar to hydrostatic pressure. EP 2356266 B1 (UHDENORA) describes an electrolytic cell having a planar, flexible cathode provided with a separator and maintained in contact with the separator by an elastic conductive element pressurized by a current divider. The cell further comprises an anode composed of a punched sheet or mesh supporting the separator. The cell can be used in a modular arrangement to form an electrolytic cell in which only terminal cells are connected to an electric power supply. Electrical continuity between adjacent cells is ensured by conducting contact strips fixed to the outer anode walls of the shells partitioning each cell, and the rigidity of the cathode current divider and anode structure and the elasticity of the conductive element cooperate to maintain uniform cathode-to-separator contact with a homogeneous pressure distribution, while simultaneously ensuring a suitable mechanical load on the contact strips. Thus, the gap between the electrodes is prevented by the use of the elastic element. EP 2734658 B1 (NEW NEL HYDROGEN) comprises a filter-press type electrolytic cell module comprising at least one closed frame defining at least one first opening, wherein the module comprises a sealing and electrically insulating material, and the material covers at least partially the surface of the frame. EP 2746429 A1 (UHDENORA) propo