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Electrode assembly of fuel cell and preparation method of electrode assembly

A technology for electrode assemblies and fuel cells, which is applied in fuel cells, battery electrodes, electrical components, etc., can solve the problems of easy deformation of CCM, ribbing of CCM, deformation and wrinkle deviation, etc., to increase mechanical strength and dimensional stability, and ensure Smoothness, guaranteed quality effect

Active Publication Date: 2020-04-28
武汉理工氢电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the thickness of CCM is very thin, usually only 20 to 30 microns, and the main material of CCM, the proton exchange membrane, has low mechanical strength and is sensitive to temperature and humidity
Therefore, in the grasping and handling of CCM sheets, CCM is particularly easy to deform and wrinkle. In the conveying of CCM coils, CCM "stringing" will be caused by tension, and CCM self-adhesion after winding will cause deformation and wrinkle deviation. And problems such as catalyst damage of CCM when passing the roll

Method used

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  • Electrode assembly of fuel cell and preparation method of electrode assembly

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preparation example Construction

[0044] The present application provides the preparation method of the above-mentioned electrode assembly of the fuel cell, which includes:

[0045] S1. Use the electrostatic adsorption force of the electrostatic auxiliary film to attach the electrostatic auxiliary film to the film layer.

[0046] S2. Remove the air in the connection area, so that a vacuum adsorption force for connecting the electrostatic auxiliary film and the film layer is formed in the connection area.

[0047] In step S2, the method of removing the air in the connection area includes: eliminating the air in the connection area by rolling or pressing, thereby causing local negative pressure to make the two more tightly combined. When rolling or pressing, it can also be heated or vacuumed at the same time to enhance the exhaust effect and better form a partial vacuum negative pressure between the interfaces to enhance the long-lasting viscosity. The persistent viscosity caused by the vacuum negative pressure...

Embodiment 1

[0054] The method for preparing the CCM sheet is:

[0055] use M815.15 proton exchange membrane (hereinafter referred to as proton exchange membrane), with a thickness of 15 μm, has a layer of 75 μm thick detachable bottom membrane.

[0056] Cut the raw material with bottom membrane into 170㎜*200㎜ sheets, which is less difficult at this time; then coat the catalyst on the side of the proton exchange membrane without the bottom membrane (that is, the first surface of the proton exchange membrane) and dried to obtain the first sample.

[0057] Place the first sample on a vacuum adsorption platform to smooth it out, and cover it with an electrostatic auxiliary film. The electrostatic auxiliary film is initially bonded to the side of the first sample with the catalyst through electrostatic adsorption force and formed at the joint between the two. The connection area, and then the gas in the connection area is discharged by rolling to form a vacuum adsorption force, so that the ...

Embodiment 2

[0061] The method for preparing and producing CCM coils:

[0062] use M815.15 proton exchange membrane with a thickness of 15μm and a width of 340mm. The raw material has a bottom membrane with a thickness of 75μm.

[0063] After carrying out double-sided continuous transfer printing of the proton exchange membrane, the electrostatic auxiliary membrane provided by one layer of embodiment 1 is coated on any one side before the obtained catalyst coating membrane is rolled up. Due to the existence of electrostatic adsorption force, the electrostatic auxiliary membrane can It is preliminarily attached to the proton exchange membrane and forms a connection area at the joint, and then rolls to remove the gas in the connection area. At this time, a vacuum adsorption force is formed between the proton exchange membrane and the auxiliary membrane located in the connection area, thereby making the two effective. combine together.

[0064]The winding tension is set at 30N. In the subs...

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Abstract

The invention discloses an electrode assembly of a fuel cell and a preparation method of the electrode assembly and relates to the field of fuel cells. The electrode assembly of the fuel cell comprises a membrane layer, a detachable electrostatic auxiliary membrane attached to the membrane layer, and an electrostatic adsorption force and a vacuum adsorption force for connecting the membrane layerand the electrostatic auxiliary membrane, the membrane layer and the electrostatic auxiliary membrane are connected through an electrostatic adsorption force and a vacuum adsorption force so that themembrane layer can be separated from the electrostatic auxiliary membrane in a lossless mode; and the membrane layer comprises any one of a proton exchange membrane and a catalyst coating membrane. Through the arrangement, the mechanical strength and the size stability of the membrane layer are improved, so that effective grabbing, conveying and roll-to-roll conveying can be realized, meanwhile, when the static auxiliary membrane is separated, a catalyst on the surface of the membrane layer cannot be stuck away, the membrane layer cannot be damaged, and the good quality of the membrane layer is guaranteed.

Description

technical field [0001] The present application relates to the field of fuel cells, in particular, to an electrode assembly of a fuel cell and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a very potential power source for future vehicles. The fuel cell membrane electrode is the "chip" of the fuel cell and the core component of power generation. [0003] In the production of fuel cell membrane electrodes, especially in the production and processing of Catalyst Coated Membrane (CCM: Catalyst Coated Membrane), whether it is a sheet or a coil, the handling and transportation of CCM are very difficult problems. Because the thickness of CCM is very thin, usually only 20 to 30 microns, and the main material of CCM, the proton exchange membrane, has low mechanical strength and is sensitive to temperature and humidity. Therefore, in the grasping and handling of CCM sheets, CCM is particularly easy to deform and wrinkle. In ...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M8/1004
CPCH01M4/8657H01M4/8663H01M4/8878H01M8/1004Y02E60/50Y02P70/50
Inventor 艾勇诚潘牧宛朝辉刘昌伟艾波周涛
Owner 武汉理工氢电科技有限公司
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