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Preparation method of high-performance and voltage-reversal-resistant membrane electrode assembly

A membrane electrode assembly and anti-voltage technology, which is applied in the direction of battery electrodes, electrical components, circuits, etc., can solve problems such as short circuit, affecting the durability of proton exchange membrane fuel cells, and explosion, so as to improve battery performance and prolong anti-voltage reversal time, the effect of reducing corrosion

Active Publication Date: 2020-04-28
SUNRISE POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In this reverse polarity situation, some irreversible damages will occur to fuel cell stack materials, including structural elements such as flow field plates and membrane electrode assemblies (MEA), which will seriously affect the durability of proton exchange membrane fuel cells (PEMFC), and even Risk of short circuit, explosion, etc.

Method used

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  • Preparation method of high-performance and voltage-reversal-resistant membrane electrode assembly
  • Preparation method of high-performance and voltage-reversal-resistant membrane electrode assembly
  • Preparation method of high-performance and voltage-reversal-resistant membrane electrode assembly

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preparation example Construction

[0047] Described preparation method specifically comprises the following steps:

[0048] Step 1. Prepare anode slurry:

[0049] Add the catalyst into the beaker, then weigh the anti-reversed electrolytic water catalytic material and add it to the beaker, add an appropriate amount of nafion solution, stir for 10-15 minutes, then add a dispersant to the beaker, and obtain the required Uniformly dispersed anode slurry. Wherein, the mass ratio of the catalyst to the anti-counterelectrode electrolysis water catalytic material is 1: (0.1-10). The catalyst is a conventional platinum-carbon catalyst, or a graphitized platinum-carbon catalyst, or a transition metal composition comprising a transition metal and nitrogen is formed on a carbon carrier, wherein the transition metal is selected from copper, silver, vanadium, chromium, molybdenum, Tungsten, manganese, cobalt, nickel, cerium and combinations thereof; the mass ratio of carbon content to nafion in the catalyst is 1: (0.1-1). ...

Embodiment 1

[0057] Such as Figure 1-3 Shown, carry out comparative experiment, be respectively three groups of embodiments and a group of comparative examples.

[0058] The specific operation process is as follows:

[0059] 1, the making of embodiment one MEA

[0060] Step 1. Preparation of anode slurry: Take 2g of catalyst and add it to a beaker, add anti-reverse electrolytic water catalytic material, add 20g of nafion solution, stir for 10 minutes, add 135g of dispersant, and obtain a uniformly dispersed anode slurry by ultrasonic dispersion , and spray the anode slurry on the anode side of the proton exchange membrane 3 .

[0061] In step 1, the catalyst is a graphitized platinum-carbon catalyst;

[0062] In step 1, the anti-reverse electrolytic water catalytic material is metal iridium and iridium oxide, and the mass ratio of platinum content in the graphitized platinum-carbon catalyst to the anti-reverse material is 1:0.5;

[0063] In step one, the mass ratio of carbon content a...

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Abstract

The invention provides a preparation method of a high-performance and voltage-reversal-resistant membrane electrode assembly. The method comprises the following steps: 1. sequentially adding a catalyst, an anti-reversal-electrode electrolyzed water catalytic material and a proper amount of nafion solution into a beaker, carrying out stirring for 10 minutes, adding a dispersing agent, and carryingout uniformly dispersing to obtain anode slurry; 2, spraying the anode slurry on the anode side of a proton exchange membrane; 3, adding a catalyst and a proper amount of nafion solution into a beaker, carrying out stirring for 10 minutes, adding a dispersing agent, and uniformly dispersing to obtain cathode slurry; 4, spraying the cathode slurry on the cathode side of the proton exchange membraneto obtain the required CCM; 5, applying 70kg / cm < 2 > of force to the prepared CCM, the gas diffusion layer and the polyester frame through an oil press, and performing hot pressing to prepare MEA; and step 6, assembling the prepared MEA into a single battery, and carrying out performance test and anti-reverse pole test. According to the invention, the anti-reverse-pole electrolytic water catalytic material is added into the anode catalytic layer, so that reverse poles caused by gas shortage can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a membrane electrode assembly with high performance and resistance to voltage reversal. Background technique [0002] Proton exchange membrane fuel cells have made remarkable progress in recent years, but short lifetime is still one of the main problems to be overcome for the wide commercialization of proton exchange membrane fuel cells. The uneven distribution of gas in the stack, the start and stop of the stack and the lack of gas caused by improper operation will all cause the battery voltage to reverse. When the gas supply is insufficient, especially when the hydrogen supply is insufficient, the anode potential will change, and at this time, H will be generated by electrolytic water reaction + , to make up for the H at the anode + Insufficient, react as follows: [0003] 2H 2 O=4H + +O 2 +4e - ; [0004] When the anode moisture content is too...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M8/1004
CPCH01M4/8828H01M4/886H01M4/8882H01M4/8896H01M4/9016H01M4/9041H01M8/1004Y02E60/50
Inventor 于鸣琦韩志佳陈桂银邢丹敏王强李梦凡臧振明王倩张萍俊吕东
Owner SUNRISE POWER CO LTD
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