CN-224212784-U - Integrated membrane electrode assembly and alkaline electrolytic cell

CN224212784UCN 224212784 UCN224212784 UCN 224212784UCN-224212784-U

Abstract

The application discloses an integrated membrane electrode assembly and an alkaline electrolytic tank, wherein the integrated membrane electrode assembly comprises a diaphragm, an electrode, a first plastic layer and a first plastic layer, wherein the diaphragm comprises a first surface and a second surface which are arranged in a reverse mode, an electrolyte channel which is communicated with the first surface and the second surface is arranged on the diaphragm, the diaphragm comprises an electrolyte channel area in the middle and a fixing area which surrounds the electrolyte channel area, the electrode is arranged on the first surface and/or the second surface and covers the fixing area, the first plastic layer is arranged in an electrolyte channel of the fixing area, and the first plastic layer extends to the first surface and/or the second surface to fix the diaphragm and the electrode. According to the application, the diaphragm and the electrode are adhered and fixed through the first plastic layer, so that an integrated design is realized, the assembly process and difficulty are effectively reduced, the assembly cost is reduced, the assembly consistency and precision of the electrolytic cell are improved, and the overall efficiency, the gas purity and the stability of the product quality of the electrolytic cell are improved.

Inventors

ZHANG WEITAO
LI FENG
GUO XIAONING
MENG XIANGRUI
MENG XIANGLIN

Assignees

保时来新材料科技(苏州)有限公司

Dates

Publication Date: 20260508
Application Date: 20250424

Claims (11)

1. An integrated membrane electrode assembly, comprising: A diaphragm comprising a first surface and a second surface which are arranged in opposition, wherein an electrolyte channel which is communicated with the first surface and the second surface is arranged on the diaphragm, and the diaphragm comprises an electrolyte channel area positioned in the middle part and a fixed area surrounding the electrolyte channel area; an electrode disposed on the first surface and/or the second surface, the electrode disposed to cover the fixation area; A first plastic layer disposed within the electrolyte channel of the fixation region, and the first plastic layer extends to the first surface and/or the second surface to fix the membrane and the electrode.
2. The integrated membrane electrode assembly of claim 1 wherein the electrode comprises a cathode and an anode disposed on the first surface and the second surface, respectively, and the first plastic layer extends to the first surface and the second surface.
3. The integrated membrane electrode assembly according to claim 1, wherein the first plastic layer is a polyphenylene sulfone resin layer, a polysulfone layer or a polyethersulfone layer, and/or, The first plastic layer extends to a depth of 0.5-0.8 mm in the electrolyte channel, and/or, The extension width of the fixing area in the radial direction of the diaphragm is 5-20 mm, and/or, The diaphragm further comprises an epitaxial region which is arranged around the fixed region, and the extension width of the epitaxial region in the radial direction of the diaphragm is 7-15 mm.
4. The integrated membrane electrode assembly of claim 1 wherein the outer edge of the electrode overlaps with the orthographic projection of the outer edge of the fixation region.
5. The integrated membrane electrode assembly of claim 1 further comprising an elastic mesh disposed on a side of the electrode facing away from the separator, an outer edge region of the elastic mesh being secured to the electrode.
6. The integrated membrane electrode assembly of claim 5 wherein the elastic mesh includes a weld zone disposed at an outer edge thereof, the weld zone being in close proximity to the electrode for weld fixation, the weld zone overlapping an orthographic projection of the fixation zone.
7. The integrated membrane electrode assembly of claim 5 wherein the elastic mesh includes an adhesive region disposed at an outer edge thereof, the integrated membrane electrode assembly further comprising a second plastic layer disposed between the adhesive region and the electrode, the second plastic layer being a polyphenylene sulfone resin layer, a polysulfone layer, or a polyethersulfone layer.
8. The integrated membrane electrode assembly according to claim 5, further comprising a sealing gasket arranged on one surface of the elastic net, which is away from the diaphragm, wherein the middle part of the sealing gasket is hollowed out, and the inner edge area of the sealing gasket is fixed with the elastic net.
9. The integrated membrane electrode assembly of claim 8 wherein the inner edge of the sealing gasket overlaps the orthographic projection of the inner edge of the fixation region and/or, A circle of annular notch is arranged in an inner edge area of one surface of the sealing gasket, and the elastic net is embedded into the annular notch.
10. The integrated membrane electrode assembly of claim 8 further comprising a first adhesive layer and a second adhesive layer, wherein the first adhesive layer is disposed on a side of the sealing gasket facing the elastic web, the second adhesive layer is disposed on a side of the elastic web facing the sealing gasket, the first adhesive layer and the second adhesive layer are matched and fix the sealing gasket and the elastic web, the first adhesive layer is a soluble polytetrafluoroethylene resin layer, the second adhesive layer is a polyphenylene sulfone layer, a polysulfone layer, a polyether sulfone layer or a polyphenylene sulfide layer, and/or, The integrated membrane electrode assembly further comprises a clamping piece, wherein the clamping piece is used for fixing the sealing gasket and the elastic net.
11. An alkaline electrolytic cell, characterized by comprising a cell body and a plurality of integrated membrane electrode assemblies according to any one of claims 1 to 10, wherein the integrated membrane electrode assemblies are sequentially stacked in the cell body.

Description

Integrated membrane electrode assembly and alkaline electrolytic cell Technical Field The application belongs to the technical field of alkaline electrolytic tanks, and particularly relates to an integrated membrane electrode assembly and an alkaline electrolytic tank. Background The electrolytic tank is used as a main body of an alkaline electrolytic water system, provides a place where hydrogen evolution and oxygen evolution reactions occur, and is also a main object of cost energy consumption and operation maintenance. The electrolytic tank is mainly assembled by hundreds of parts such as end plates, pole frames, pole plates, electrodes, diaphragms, sealing gaskets and the like, and comprises tens or even hundreds of electrolytic cells which are connected together by screw rods and end plates to form a cylindrical structure. At present, each subassembly of electrolysis trough is independent structure, and at the electrolysis trough assembly process, it is constituteed into the electrolysis trough unit to need to adopt certain lamination structure with each subassembly, need guarantee that position and the size of each spare part accord with the design requirement and firm in connection, stability and leakproofness are good each other. Wherein, a large amount of membrane electrode assemblies assemble into the most main and important part, and range upon range of precision is influenced by the operator level, often is difficult to guarantee the high accuracy and the uniformity of equipment, very big influence the stability of the whole efficiency of electrolysis trough and product quality, and the equipment process consumes a large amount of manpowers and time, especially in jumbo size electrolysis trough equipment scene, and each subassembly all needs the manipulator to carry the equipment, has led to great assembly cost. Disclosure of utility model The application aims to provide an integrated membrane electrode assembly and an alkaline electrolytic cell, which are used for solving the technical problems that each assembly of the existing electrolytic cell is of an independent structure, high precision and consistency of assembly are difficult to ensure, the overall efficiency of the electrolytic cell and the stability of product quality are greatly influenced, a great deal of manpower and time are consumed in the assembly process, and large assembly cost is caused. In order to achieve the above object, a first aspect of the present application provides an integrated membrane electrode assembly comprising: A diaphragm comprising a first surface and a second surface which are arranged in opposition, wherein an electrolyte channel which is communicated with the first surface and the second surface is arranged on the diaphragm, and the diaphragm comprises an electrolyte channel area positioned in the middle part and a fixed area surrounding the electrolyte channel area; an electrode disposed on the first surface and/or the second surface, the electrode disposed to cover the fixation area; A first plastic layer disposed within the electrolyte channel of the fixation region, and the first plastic layer extends to the first surface and/or the second surface to fix the membrane and the electrode. In one or more embodiments, the electrode includes a cathode and an anode disposed on the first surface and the second surface, respectively, and the first plastic layer extends to the first surface and the second surface. In one or more embodiments, the first plastic layer is a polyphenylene sulfone resin layer, a polysulfone layer, or a polyethersulfone layer. In one or more embodiments, the first plastic layer extends to a depth of 0.5-0.8 mm in the electrolyte channel. In one or more embodiments, the fixing region has an extension width of 5 to 20mm in the radial direction of the diaphragm. In one or more embodiments, the diaphragm further includes an extension region disposed around the fixed region, and an extension width of the extension region in a radial direction of the diaphragm is 7 to 15mm. In one or more embodiments, the outer edge of the electrode overlaps with the orthographic projection of the outer edge of the fixation region. In one or more embodiments, the electrode further comprises an elastic mesh disposed on a side of the electrode facing away from the separator, and an outer edge region of the elastic mesh is fixed to the electrode. In one or more embodiments, the elastic mesh includes a weld zone disposed at an outer edge thereof, the weld zone being in close fitting welded engagement with the electrode, the weld zone overlapping an orthographic projection of the fixed zone. In one or more embodiments, the elastic mesh includes an adhesive region disposed at an outer edge thereof, and the integrated membrane electrode assembly further includes a second plastic layer disposed between the adhesive region and the electrode, the second plastic layer being a polyphenylene sulfone resin layer, a poly