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A fuel cell membrane-electrode interface structure characterization sample processing method

A fuel cell membrane and electrode interface technology, which is applied to fuel cells, circuits, analytical materials, etc., can solve the problems of difficult section imaging, the inability to neatly break the plane, and the difficulty in grasping the position of the break, so as to achieve the effect of a simple preparation process.

Active Publication Date: 2022-06-07
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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  • A fuel cell membrane-electrode interface structure characterization sample processing method

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Effect test

Embodiment 1

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

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

[0028] (2) The sample box is placed in the reactor, the reactor is sealed, the vacuum is pumped to 1.3Pa absolute pressure, and it is allowed to stand for 8min; the membrane electrode sample, especially the diffusion layer, is generally a porous channel, and under this vacuum, the gas in the porous channel can be extracted.

[0029] (3) The liquid resin is input into the reactor, and the input amount of the liquid resin is to completely immerse the membrane electrode sample in the liquid resin; The liquid resin is an epoxy resin and methanol in accordance with the mass ratio of 1: 6 mixed.

[0030] (...

Embodiment 2

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

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

[0036] (2) Place the sample box in the reactor, seal the reactor, vacuum to 12Pa absolute pressure, and stand for 5min;

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

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

[0039] (5) Release the reactor pressure so t...

Embodiment 3

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

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

[0044] (2) Place the sample cassette in the reactor, seal the reactor, vacuum to 2Pa absolute pressure, and let stand for 10min.

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

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

[0047] (5) Release the reactor pr...

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Abstract

The invention relates to a sample processing method for characterizing the membrane-electrode interface structure of a fuel cell, comprising the following steps: (1) placing the membrane-electrode sample in a sealable sample box; (2) placing the sample box in a reaction kettle, sealing the reaction Reactor, evacuated to 1.3-12Pa absolute pressure, let stand for 5-10min; (3) input liquid resin into the reactor, the input amount of liquid resin is to make the membrane electrode sample completely immersed in the liquid resin; (4) release the vacuum , pressurize the reactor to 0.5-1.5MPa and keep it for 30-60min; (5) release the pressure of the reactor to keep the resin in the sample box; (6) put the sample box in a high temperature environment to cure the resin and cut the film The electrode samples were ground and the cross section was observed by scanning electron microscope. Compared with the prior art, the invention has the advantages of simple method, accurate structure and the like.

Description

Technical field [0001] The present invention relates to a fuel cell, in particular to a fuel cell membrane electrode interface structure characterization sample processing method. Background [0002] Proton exchange membrane fuel cell is a kind of clean energy, because of its environmental protection, low noise, high energy and other advantages is considered to be one of the most promising clean energy, is actively promoted in the field of vehicle energy. [0003] Membrane electrode is the core component of proton exchange membrane fuel cell, understanding the structural morphology characteristics of the catalytic layer, diffusion layer and reaming layer in membrane electrode is of great importance to the study of membrane electrode working state, performance performance, low temperature start-up, life, etc. [0004] In order to reflect the internal structure of the membrane electrode, it is often necessary to observe the membrane electrode fault by scanning electron microscopy. ...

Claims

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Application Information

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Patent Type & Authority Patents(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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