Membrane permeation electrode for electrochemical process

A membrane permeation and electrochemical technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of not considering the selective permeability relationship of microstructure, uncontrollable interlayer microstructure, and poor selective permeability, etc., to achieve High-efficiency catalytic active surface, improved work stability, and reduced energy consumption

Active Publication Date: 2011-06-01
CHANGZHOU UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this improvement uses a rigid porous current collector instead of a flexible gas diffusion layer, the catalyst layer attached to the surface of the proton exchange membrane is prepared as an independent sheet, so there are still loose bonds between layers and high contact resistance. Uncontrollable interlayer microstructure, poor gas and liquid selective permeability, etc.
[0007] In addition, there are also reports on the preparation of electrodes by means of electroplating deposition (application number 200610138715). Since it mainly revolves around the "membrane ele

Method used

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  • Membrane permeation electrode for electrochemical process
  • Membrane permeation electrode for electrochemical process

Examples

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Effect test

Embodiment 1

[0029] A 316L stainless steel microporous plate with an average pore diameter of 20um and a thickness of 3mm is used as a support layer, and a 316L stainless steel microporous intermediate layer (1) with an average pore diameter of 5um and a thickness of 50um is vacuum sintered (1150°C) on its surface. On this basis, a 25um-thick 316L stainless steel microporous intermediate layer (2) with an average pore diameter of 0.8um was sintered in vacuum (1100°C) on the surface of the stainless steel microporous intermediate layer (1) with a pore diameter of 5um. The stainless steel microporous middle layer (1) and the stainless steel microporous middle layer (2) together constitute the middle layer of the membrane permeation electrode. Then vacuum sputtering technology is used to coat a platinum layer with a thickness of 5 um on the surface of the intermediate layer as a film layer, and the average pore diameter of the film layer is 0.05 um. At this time, the membrane layer is located...

Embodiment 2

[0033] With a 2mm thick titanium metal microporous plate with an average pore diameter of 3um as the support body, a layer of 5um thick metal ruthenium iridium tantalum intermediate layer is covered on the outer surface of the support body by dipping pyrolysis method. The average pore diameter of this layer is 0.5um, and the pore diameter >0.2% of pores larger than 1.5um. Under this condition, the ruthenium, iridium and tantalum layer prepared by dipping pyrolysis is simultaneously covered on the channel surface in the support body, and the support body covered with the ruthenium, iridium and tantalum layer in the inner channel is measured, and its average pore size is 2um. A dynamic film layer with a thickness of 100um is prepared on the surface of the ruthenium, iridium and tantalum intermediate layer by dipping method using the tin-antimony alloy suspension with an average particle size of 2um as the raw material.

[0034] Use this electrode as the electrolytic anode, and u...

Embodiment 3

[0037] Square flat membrane element, the support layer is made of titanium metal powder material extruded and sintered, with a thickness of 3mm, a side length of 60mm, an average pore diameter of 5um, and a porosity of 31%. The surface of the support is covered with a film layer of titanium metal powder and perfluorosulfonic acid resin (1:1) mixed material, the thickness of the film layer is 10um, the porosity of the film layer is 25%, the average pore size is 0.3um, and the pore size is randomly distributed 3 ~ 4um hole channels (accounting for 0.5% of the total).

[0038] Press the dense solid electrolyte on the membrane side surface of the membrane element so that the two are in close contact. The titanium metal membrane element is immersed in 1M sodium hydroxide solution, and connected to the negative pole of the power supply as the cathode, with a dense solid electrolyte as the interval, using a salt bridge to form a current loop with the anode connected to the positive p...

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Abstract

The invention relates to a membrane permeation electrode for an electrochemical process, in particular to the membrane permeation electrode which is provided with a selective permeation membrane layer and comprises one or more layers of conductive porous permeable medium materials, wherein the one or more layers of materials have catalytic reactivity participating in the electrochemical process. Under the conditions of controlling the pore diameter distribution and the characteristics of materials on the surface of a pore channel, the membrane permeation electrode provided by the invention can achieve the selective bidirectional penetration of a goal object. According to the membrane permeation electrode in the application, the stable and high-efficiency catalytic active surface can be maintained and the efficiency of the electrochemical process from mass transfer, heat transfer and reaction can be improved. The membrane permeation electrode provided by the invention can be used for the electrochemical process in the fields of chemical engineering, environmental protection, medical treatment and public health and the like and is especially suitable for the electrochemical process generating a heterogeneous reaction.

Description

technical field [0001] The invention relates to a membrane permeation electrode used in electrochemical process, in particular to a permeation electrode which is composed of one or more layers of porous material and has membrane separation function. The membrane permeable electrode of the invention can be used in electrochemical processes in the fields of chemical industry, environmental protection, medical treatment and sanitation, etc., and is especially suitable for electrochemical processes in which heterogeneous reactions occur. Background technique [0002] Electrodes are key components of electrochemical devices such as fuel cells and electrolytic cells, and their basic functions are to conduct electricity and generate electrode reactions. Due to the influence of the electric field shielding effect and the second type of conductor charge transmission path, the electrode spacing and the shape of the plate will affect the cell voltage, load current density and energy co...

Claims

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Application Information

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IPC IPC(8): H01M4/94
CPCY02E60/50
Inventor 王龙耀王岚赵建洪陈群
Owner CHANGZHOU UNIV
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