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Evaluation device and evaluation method an electrocatalyst property used for a solid polymer electrolyte fuel cell and water electrolysis

A solid polymer and evaluation device technology, which is applied to measuring devices, material analysis by electromagnetic means, and material analysis, can solve the problems of complex influencing factors, many catalysts, and cumbersome processes, and achieve low cost, convenient operation, and reduced wasteful effect

Active Publication Date: 2017-04-26
SHANDONG SAIKESAISI HYDROGEN ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problem that the environment of the electrocatalyst is different from the actual application in the evaluation method of the liquid three-electrode system widely used at present, and the technology in the evaluation method of the assembled battery is cumbersome, requires many catalysts, high cost, and complicated influencing factors. The problem is to provide an evaluation device and evaluation method for the performance of solid polymer electrolyte fuel cells and water electrolysis electrocatalysts that are simple to prepare, easy to operate, low in cost, and can simulate the operating environment

Method used

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  • Evaluation device and evaluation method an electrocatalyst property used for a solid polymer electrolyte fuel cell and water electrolysis
  • Evaluation device and evaluation method an electrocatalyst property used for a solid polymer electrolyte fuel cell and water electrolysis
  • Evaluation device and evaluation method an electrocatalyst property used for a solid polymer electrolyte fuel cell and water electrolysis

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preparation example Construction

[0043] a. Preparation of Electrolyte Substrate

[0044]Carve holes of the required electrode shape and area on two hydrophobic basement membrane materials 2, and then heat-press the hydrophobic basement membrane material 2 on both sides of the ion-exchange membrane 3 to form electrolyte substrates. The hot-pressing pressure is 10MPa, and Pressing time is 180s;

[0045] b. prepare catalyst slurry for working electrode, counter electrode and reference electrode;

[0046] c. Preparation of solid electrolyte electrode 8

[0047] Add the prepared catalyst slurry of the working electrode, the counter electrode and the reference electrode dropwise to the corresponding electrode position, cut the current collector into the desired shape, heat press it on the corresponding electrode respectively, and then connect the current collector with conductive glue 1 and the wire 5 are made into a solid electrolyte electrode 8;

[0048] d. Electrocatalytic performance test

[0049] The prepa...

Embodiment 1

[0052] Embodiment 1 tests oxygen reduction reaction in Nafion 115 electrolyte

[0053] a. Preparation of electrolyte substrate: Use 30 μm thick polytetrafluoroethylene film as the electrolyte substrate material, cut it into a shape of 6cm*6cm, and then carve two holes of 5mm*5mm in the middle, and the gap between the two The spacing is controlled at 5mm; then the prepared PTFE film is hot-pressed on both sides of the clean Nafion 115 film, the hot-pressing pressure is 10MPa, and the hot-pressing time is 180s.

[0054] b. The catalyst slurry of the working electrode, the counter electrode and the reference electrode is the same, and its preparation method is: weigh 5 mg of 20% Pt / C catalyst with a primary balance, add 50 μL of 5% Nafion solution and 950 μL of ethanol, and ultrasonically mix the solution to Pt / C is uniformly dispersed in the solution.

[0055] c. Preparation of solid electrolyte electrode: Add the prepared catalyst slurry dropwise to the corresponding electrod...

Embodiment 2

[0057] Example 2 Methanol Electrooxidation Reaction Tested in Nafion 115 Electrolyte

[0058] a. Preparation of electrolyte substrate: Use 30 μm thick polytetrafluoroethylene film as the electrolyte substrate material, cut it into a shape of 6cm*6cm, and then carve two holes of 5mm*5mm in the middle, and the gap between the two The spacing is controlled at 5mm; then the prepared PTFE film is hot-pressed on both sides of the clean Nafion 115 film, the hot-pressing pressure is 10MPa, and the hot-pressing time is 180s.

[0059] b. 20% Pt10% Ru / C is used as the catalyst for the working electrode, and 20% Pt / C is used as the catalyst for the counter electrode and reference electrode. solution and 950 μL ethanol, and ultrasonically mix the solution until the catalyst is evenly dispersed in the solution.

[0060] c. Preparation of solid electrolyte electrodes: Add the prepared catalyst slurry dropwise to the corresponding electrode positions, and add 5 μL of 20% Pt10% Ru / C catalyst ...

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Abstract

The invention relates to an evaluation device and evaluation method of an electrocatalyst property used for a solid polymer electrolyte fuel cell and water electrolysis, and belongs to the technical field of electrocatalyst activity evaluation. The problem that environment at which the electrocatalyst is located is different from actual application in a currently widely adopted liquid three-electrode system and the technical problem that evaluation the technology is tedious, the amount the needed catalyst is high, the cost is high and the influence factor is complex in an assembled battery evaluation method. The evaluation device microminiaturizes a membrane electrode assembly, a reversible hydrogen electrode is added as a reference electrode to test an electrocatalytic property, the advantages of the currently widely adopted liquid three-electrode system and a membrane electrode catalytic property are combined, and the catalyst is made to be located in the solid polymer electrolyte fuel cell to test the electrocatalyst property of the solid polymer electrolyte and better simulates the catalytic property in an actual using environment. The evaluation method can accurately and effectively evaluate the electrocatalyst property used for the polymer electrolyte fuel cell and the water electrolysis.

Description

technical field [0001] The invention belongs to the technical field of electrocatalyst activity evaluation, and in particular relates to an evaluation device and evaluation method for the performance of solid polymer electrolyte fuel cells and water electrolysis electrocatalysts. Background technique [0002] As a safe, green and environmentally friendly electrolyte material, solid polymers have been widely used in fuel cells and water electrolysis. In order to improve the electrocatalytic performance and reduce the cost of the catalyst, cost-effective electrocatalysts have become one of the main directions of current research. Therefore, an effective method for evaluating catalytic performance is very important. [0003] At present, there are two methods for evaluating catalyst performance. One is a liquid electrolyte three-electrode system, which uses an aqueous solution of a certain concentration of acid or alkali as the electrolyte, and a catalyst-loaded glassy carbon e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/416G01N27/406
CPCG01N27/406G01N27/416
Inventor 邢巍龙志马树华葛君杰刘长鹏
Owner SHANDONG SAIKESAISI HYDROGEN ENERGY
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