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Method for preparing high-stability fuel cell catalyst coating slurry

A fuel cell, high-stability technology, used in battery electrodes, circuits, electrical components, etc., can solve the problem of large differences in the performance of catalyst coating membranes, and achieve the effects of avoiding damage, improving performance, and improving stability.

Active Publication Date: 2021-03-26
SINOHYKEY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the catalyst coating membrane prepared by coating the catalyst slurry with catalyst sedimentation on the proton exchange membrane is very different from that of the catalyst slurry without sedimentation

Method used

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  • Method for preparing high-stability fuel cell catalyst coating slurry
  • Method for preparing high-stability fuel cell catalyst coating slurry
  • Method for preparing high-stability fuel cell catalyst coating slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Mixing and dispersing steps for the first time:

[0025] (1) According to catalyst: surfactant: perfluorosulfonic acid resin solution: n-propanol: water = 1: 0.005: 0.25: 1: 11, take raw materials and pre-disperse the above raw materials: first weigh 110.0g of water in a beaker , and the water was placed under an electric stirrer and stirred at a stirring rate of 300rpm; while stirring, 10g of Tec10F50e catalyst produced by Tanaka Precious Metals (TKK) was slowly added to the beaker, and after stirring for 1min, 0.05g of surfactant was added in turn Sodium dodecylbenzenesulfonate, 2.5g ChemoursD2020 perfluorosulfonic acid resin solution (the solid content of the solution is 20.0%), 10.0g n-propanol; after the addition of the raw materials, continue to stir for 5.0min to fully mix the raw materials to obtain the first a predispersion.

[0026] (2) Put the first pre-dispersion in (1) into a bead mill for dispersion at a speed of 3000 rpm, and take out the slurry afte...

Embodiment 2

[0034] (1) Mixing and dispersing steps for the first time:

[0035] (1) According to catalyst: surfactant: perfluorosulfonic acid resin solution: n-propanol: water = 1: 0.005: 0.75: 1: 11 to take raw materials, and pre-disperse the above raw materials: first weigh 110.0g of water in a beaker , and the water was placed under an electric stirrer and stirred at a stirring rate of 300rpm; while stirring, 10g of Tec10F50e catalyst produced by Tanaka Precious Metals (TKK) was slowly added to the beaker, and after stirring for 1min, 0.05g of surfactant was added in turn Perfluorooctane sulfonic acid, 7.5g Chemours D2020 perfluorosulfonic acid resin solution (the solid content of the solution is 20.0%), 10.0g n-propanol; after the addition of the raw materials, continue to stir for 5.0min to fully mix the raw materials to obtain the first Predispersion.

[0036] (2) Put the first pre-dispersion in (1) into a bead mill for dispersion at a speed of 3000 rpm, and take out the slurry after...

Embodiment 3

[0044] (1) Mixing and dispersing steps for the first time:

[0045] (1) According to the catalyst: perfluorosulfonic acid resin solution: n-propanol: water = 1:0.75:1:11 to take the raw materials, and pre-disperse the above raw materials: first weigh 110.0g of water in a beaker, and put the water in Stir under an electric stirrer at a stirring rate of 300rpm; while stirring, slowly add 10g of Tec10F50e catalyst produced by Tanaka Precious Metals (TKK) in the beaker, and after stirring for 1min, add 7.5g of Chemours D2020 perfluorosulfonic acid resin solution ( The solid content of the solution is 20.0%), 10.0 g of n-propanol; after the raw materials are added, continue to stir for 5.0 min to fully mix the raw materials to obtain the first pre-dispersion.

[0046] (2) Put the first pre-dispersion in (1) into a bead mill for dispersion at a speed of 3000 rpm, and take out the slurry after grinding for 30 minutes to obtain the first-stage mixed dispersion.

[0047] (2) mixing an...

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Abstract

The invention relates to the field of fuel cells, in particular to a method for preparing high-stability fuel cell catalyst coating slurry. The method for preparing the high-stability fuel cell catalyst coating slurry comprises at least two mixing and dispersing steps: mixing and dispersing a catalyst, perfluorosulfonic acid resin and a solvent in the first mixing and dispersing step to obtain a first-stage mixed dispersion liquid; and mixing and dispersing the previous-stage mixed dispersion liquid and newly added perfluorosulfonic acid resin in other mixing and dispersing steps; wherein a surfactant is added in at least one mixing and dispersing step for mixing and dispersing. The catalyst in the catalyst slurry prepared by the method has good dispersion stability, is not easy to settle,and has good performance when being applied to a membrane electrode.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a method for preparing a highly stable fuel cell catalyst coating slurry. Background technique [0002] The membrane electrode is the core component of the fuel cell. The performance of the membrane electrode depends largely on the structure of the catalyst layer in the membrane electrode, and the structure of the catalyst layer is affected by the preparation and coating of the catalyst slurry. In industrial production, the membrane electrode slurry prepared at one time can generally be used to produce a batch of catalyst coating membranes. It generally takes a long time from the completion of the preparation of the catalyst slurry to the production of all the catalyst slurry into a batch of catalyst coating membranes. (minimum 24 hours), because the catalyst in the catalyst slurry is generally a metal or metal oxide with a higher density, after these metals or metal oxides are disperse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/92
CPCH01M4/8828H01M4/9041H01M4/92Y02E60/50
Inventor 赵明全莫善云钟家强杨云松叶思宇邹渝泉唐军柯孙宁吴力杰
Owner SINOHYKEY TECH CO LTD
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