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A solid polymer electrolyte electrolyzer

A solid polymer and electrolytic cell technology, applied in the field of electrolysis, can solve the problems of unused catalyst and reduced catalyst utilization, and achieve the effects of compact structure, simple processing and cost saving

Active Publication Date: 2012-02-15
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent does not mention the material of the separation layer. Processing the flow field on the separation layer has certain advantages and can save costs, but the direct contact between the current collector and the catalytic layer (or diffusion layer) on a large area will cause some catalysts to fail. Utilization, although this improves the electrolysis efficiency, but reduces the utilization rate of the catalyst

Method used

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  • A solid polymer electrolyte electrolyzer
  • A solid polymer electrolyte electrolyzer
  • A solid polymer electrolyte electrolyzer

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Experimental program
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Effect test

Embodiment 1

[0032] The SPE electrolytic cell structure of the present invention mainly consists of two end plates [2], insulating material [3], cathode diffusion layer [4], MEA [5], anode integrated diffusion layer flow field [6], collector [ 7] etc. composition. The anode diffusion layer is integrated with the flow field, titanium powder is used as the base material, and the prepared mold is pressed at a certain temperature and pressure to obtain an integrated flow field of the diffusion layer. Two adjacent anodes or cathodes share a ring-shaped current collector. The current collector connected to the cathode of the power supply is in close contact with the two cathode diffusion layers [4], and the current collector connected to the anode of the power supply is in close contact with the two cathode diffusion layers [4]. The flow field of the anode integrated diffusion layer [6] adopts the method of compression and close contact. MEA is prepared by spraying method. The fastening of the...

Embodiment 2

[0034] The SPE electrolytic cell structure of the present invention mainly consists of two end plates [2], insulating material [3], cathode diffusion layer [4], MEA [5], anode integrated diffusion layer flow field [6], collector [ 7] etc. composition. The anode diffusion layer is integrated with the flow field, titanium powder is used as the base material, and the prepared mold is used for injection molding to obtain an integrated diffusion layer flow field. The current collector [7] connected to the cathode of the power supply is in close contact with the cathode diffusion layer [4] and sealed by insulating materials on both sides; the current collector connected to the anode of the power supply is in close contact with the anode diffusion layer and the flow field The molds are in close contact with each other by means of compression to form a whole of the flow field of the integrated diffusion layer of the current collector and the anode, and are sealed by insulating materia...

Embodiment 3

[0036] The SPE electrolyzer structure of Embodiment 1 is adopted. A flow field with a certain groove-to-ridge ratio is processed on the anode diffusion layer by mold hot pressing. Two adjacent anodes or cathodes share an annular current collector, and the annular current collector is placed between the two anode integrated diffusion layer flow fields [6] and connected by spot welding. Spot welding is used between the current collector connected to the cathode of the power supply and the two cathode diffusion layers [4]. MEA is prepared by chemical deposition method. The electrolyzer is fastened with bolts.

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Abstract

A solid polymer electrolyte electrolytic cell [1], the electrolytic cell mainly includes an end plate [2], an insulating material [3], a cathode diffusion layer [4], a membrane electrode (MEA) [5], an anode integrated diffusion layer flow field [6], current collector [7], etc. It is characterized in that the anode diffusion layer is integrated with the flow field, the annular current collector [7] is in direct and close contact with the cathode diffusion layer [4] and the integrated diffusion layer flow field [6], in addition, two adjacent anodes or cathodes are in close contact. One feed port or discharge port is shared, and two adjacent anodes or cathodes share a current collector. The invention has the advantages of compact and simple structure, convenient processing, low cost, low electrolysis working voltage, high current density and electrolysis efficiency, and long service life.

Description

technical field [0001] The invention relates to the field of electrolysis, in particular to a structure of an electrolytic cell using a solid polymer as an electrolyte and a preparation method thereof. Background technique [0002] Solid polymer electrolyte (Solid Polymer Electrolyte, SPE) electrolyzer has become the research field of various countries because of its compact structure, high current density, high electrolysis efficiency, safety and reliability, high gas purity, long service life, and large production capacity. The United States and Japan already have an absolute advantage in this field, and they have developed hydrogen production capacity of 30 and 60Nm respectively. 3 / h SPE water electrolysis device. With the improvement of the electrolytic capacity of the electrolyzer, its volume will become an important factor restricting its development. In addition, for SPE electrolyzers, the high cost is the biggest obstacle restricting its development. On the one ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B9/00
Inventor 徐春保赵龙
Owner ENN SCI & TECH DEV
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