Fuel cell membrane electrode interface structure characterization sample processing method

A fuel cell membrane-electrode interface technology, which is applied in fuel cells, circuits, electrical components, etc., can solve the problems of difficult imaging of cut surfaces, untidy broken surfaces, and difficulty in clearly displaying internal structures, etc., and achieves a simple preparation process. Effect

Active Publication Date: 2019-05-14
SHANGHAI SHENLI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that it is difficult to grasp the disconnection position, and at the same time, the fractured surface cannot be very neat, which brings difficulties to section imaging, and it is generally difficult to clearly display all internal structures

Method used

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  • Fuel cell membrane electrode interface structure characterization sample processing method

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Comparison scheme
Effect test

Embodiment 1

[0026] A fuel cell membrane-electrode interface structure characterization sample processing method, comprising the following steps:

[0027] (1) The membrane electrode sample is placed in a sealable sample box; the membrane electrode sample is a fuel cell membrane electrode, including a proton exchange membrane and a catalyst layer and a diffusion layer arranged on both sides thereof.

[0028] (2) Put the sample box in the reaction kettle, seal the reaction kettle, evacuate to 1.3Pa absolute pressure, and let it stand for 8 minutes; the membrane electrode sample, especially the diffusion layer, generally has porous channels, under this vacuum degree, the The gas in the porous channel is extracted.

[0029] (3) Input the liquid resin into the reaction kettle, the input amount of the liquid resin is such that the membrane electrode sample is completely immersed in the liquid resin; the liquid resin is formed by mixing epoxy resin and methanol according to the mass ratio of 1:6....

Embodiment 2

[0034] A fuel cell membrane-electrode interface structure characterization sample processing method, comprising the following steps:

[0035] (1) The membrane electrode sample is placed in a sealable sample box; the membrane electrode sample is a fuel cell membrane electrode, including a proton exchange membrane and a catalyst layer and a diffusion layer arranged on both sides thereof.

[0036] (2) Place the sample box in the reaction kettle, seal the reaction kettle, evacuate to 12Pa absolute pressure, and let it stand for 5 minutes;

[0037] (3) Input the liquid resin in the reactor, the input amount of the liquid resin is to make the membrane electrode sample completely immersed in the liquid resin; the liquid resin is epoxy resin or phenolic resin and organic solvent according to the mass ratio of 1:5 mixed. The organic solvent includes methanol, ethanol or propanol.

[0038] (4) Release the vacuum, pressurize the reactor to 0.5MPa, and keep it for 60min;

[0039] (5) R...

Embodiment 3

[0042] A fuel cell membrane-electrode interface structure characterization sample processing method, comprising the following steps:

[0043] (1) The membrane electrode sample is placed in a sealable sample box; the membrane electrode sample is a fuel cell membrane electrode, including a proton exchange membrane and a catalyst layer and a diffusion layer arranged on both sides thereof.

[0044] (2) Put the sample box in the reaction kettle, seal the reaction kettle, evacuate to 2Pa absolute pressure, and let it stand for 10 minutes.

[0045] (3) Input the liquid resin in the reactor, the input amount of the liquid resin is to make the membrane electrode sample completely immersed in the liquid resin; the liquid resin is epoxy resin or phenolic resin and organic solvent according to the mass ratio of 1:10 mixed. The organic solvent includes methanol, ethanol or propanol.

[0046] (4) Release the vacuum, pressurize the reactor to 1.5MPa, and keep it for 30min;

[0047] (5) Re...

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Abstract

The invention relates to a fuel cell membrane electrode interface structure characterization sample processing method, comprising the following steps of (1) placing a membrane electrode sample in a sealable sample cartridge; (2) placing the sample cartridge in a reaction vessel, sealing and vacuumizing the reaction vessel to an absolute pressure of 1.3-12 Pa for standing for 5-10 min; (3) inputting a liquid resin into the reaction vessel, wherein the input amount of the liquid resin is such that the membrane electrode sample is completely immersed in the liquid resin; (4) carrying out vacuum release, pressurizing the reaction vessel to 0.5-1.5 MPa for 30-60 min; (5) releasing the pressure of the reaction vessel to keep the resin in the sample cartridge; and (6) placing the sample cartridgein a high temperature environment to cure the resin, cutting the membrane electrode sample, smoothing the fracture surface, and observing by scanning electron microscopy. Compared with the prior art,the invention has the advantages of simple method, accurate structure and the like.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a method for processing a fuel cell membrane-electrode interface structure characterization sample. Background technique [0002] Proton exchange membrane fuel cell is a kind of clean energy. Due to its advantages of environmental protection, low noise and high energy, it is considered to be one of the most promising clean energy, and it is actively promoted in the field of vehicle energy. [0003] Membrane electrodes are the core components of proton exchange membrane fuel cells. Understanding the structural and morphological characteristics of the catalytic layer, diffusion layer, and pore-expanding layer in the membrane electrode is very important for studying the working state, performance, low-temperature start-up, and life of the membrane electrode. used by the author. [0004] In order to reflect the internal structure of the membrane electrode, it is often necessary to observe the membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2202H01M8/1004
CPCY02E60/50
Inventor 周斌甘全全徐鑫戴威
Owner SHANGHAI SHENLI TECH CO LTD
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