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Rapid activation method for phosphoric acid doped polybenzimidazole high-temperature membrane fuel cell membrane electrode

A polybenzimidazole and fuel cell membrane technology, applied in the field of fuel cells, can solve the problems of long activation time and low activation efficiency, and achieve the effects of improving work efficiency, accelerating the distribution of phosphoric acid, and shortening the completion time

Active Publication Date: 2019-06-28
江苏乾景新能源产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional activation method for HT-PEMFC still has the problem of low activation efficiency. The entire activation process needs to last for more than 48 hours. For large-area membrane electrodes, the required activation time is longer.

Method used

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  • Rapid activation method for phosphoric acid doped polybenzimidazole high-temperature membrane fuel cell membrane electrode
  • Rapid activation method for phosphoric acid doped polybenzimidazole high-temperature membrane fuel cell membrane electrode

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Experimental program
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Effect test

Embodiment 1

[0023] First, it is necessary to prepare and assemble the polybenzimidazole high temperature membrane fuel cell membrane electrode, the specific method is as follows:

[0024] The polybenzimidazole (PBI) polymer monomer and the platinum carbon powder were mixed at 40 wt. % by mass, and the mixed catalyst raw material obtained from the configuration was dispersed into an isopropanol solution to obtain a catalyst slurry. In addition, the size of the gas diffusion electrode required for the preparation of the membrane electrode is 10 cm × 10 cm, and the model of the gas diffusion back layer is H2135 CX 196 carbon paper from Freudenberg Company. The catalyst slurry prepared in the above steps is manually sprayed on the commercial gas diffusion back layer with a spray gun. , the platinum content on the prepared electrode is 1.0mg / cm 2 . Then put the gas diffusion electrode into a muffle furnace at 200° C. for sintering for 40 minutes under the protection of an inert gas.

[0025]...

Embodiment 2

[0033] In order to compare the effect of the rapid activation method of the phosphoric acid-doped polybenzimidazole high-temperature membrane fuel cell membrane electrode proposed by the present invention, it is necessary to compare it with the conventional HT-PEMFC activation method.

[0034] First, it is necessary to prepare and assemble the polybenzimidazole high temperature membrane fuel cell membrane electrode, the specific method is as follows:

[0035] The polybenzimidazole (PBI) polymer monomer and the platinum carbon powder were mixed at 40 wt. % by mass, and the mixed catalyst raw material obtained from the configuration was dispersed into an isopropanol solution to obtain a catalyst slurry. In addition, the size of the gas diffusion electrode required for the preparation of the membrane electrode is 10 cm × 10 cm, and the model of the gas diffusion back layer is H2135 CX 196 carbon paper from Freudenberg Company. The catalyst slurry prepared in the above steps is man...

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Abstract

The invention discloses a rapid activation method for a phosphoric acid doped polybenzimidazole high-temperature membrane fuel cell membrane electrode, and belongs to the technical field of fuel cells. During an activation process, when the battery is heated from room temperature to 120 degrees centigrade, an electrochemical workstation is used for cyclic voltammetry scanning. The cyclic voltammetric scanning accelerates the redistribution of phosphoric acid in a membrane electrode in the initial stage of activation, and can clean the impurities attached to the surface of an electrode catalystsuch that a catalytic layer can expose more active surfaces. The method can shorten the time required for activation, and the entire activation process only takes 4-5 hours. Thus, the method providesa new method for the activation of a high-temperature membrane fuel cell.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a rapid activation method for phosphoric acid-doped polybenzimidazole high-temperature membrane fuel cells. Background technique [0002] In recent years, in order to solve the problems of low catalyst activity, low carbon monoxide poisoning resistance, and complicated water management process in low-temperature polyelectrolyte membrane fuel cells (PEMFC), relevant researchers have proposed phosphoric acid doped with operating temperatures in the range of 120-200 °C. Heteropolybenzimidazole high-temperature membrane fuel cells (HT-PEMFC) try to solve the above problems faced by low-temperature PEMFC by increasing the operating temperature of the fuel cell, thereby further improving the performance of PEMFC and reducing the cost of PEMFC preparation and operation. [0003] In order to achieve the best working efficiency, the assembled proton exchange membrane fuel c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04223H01M8/04701H01M8/10
CPCY02E60/50
Inventor 马强苏华能张玮琦朱新坚吴瞾慧
Owner 江苏乾景新能源产业技术研究院有限公司
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