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A rapid activation method for phosphoric acid-doped polybenzimidazole high-temperature membrane fuel cell membrane electrodes

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

Active Publication Date: 2021-11-05
江苏乾景新能源产业技术研究院有限公司
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  • 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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  • A rapid activation method for phosphoric acid-doped polybenzimidazole high-temperature membrane fuel cell membrane electrodes
  • A rapid activation method for phosphoric acid-doped polybenzimidazole high-temperature membrane fuel cell membrane electrodes

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Experimental program
Comparison scheme
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 10cm×10cm, 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 manuall...

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Abstract

The invention discloses a method for quickly activating a membrane electrode of a phosphoric acid-doped polybenzimidazole high-temperature membrane fuel cell, which belongs to the technical field of fuel cells. During the activation process, when the battery is heated from room temperature to 120 ° C, the electrochemical workstation is used to perform cyclic voltammetry scanning; the use of cyclic voltammetry scanning can accelerate the redistribution of phosphoric acid in the membrane electrode in the early stage of activation, and can be cleaned Impurities are attached to the surface of the electrode catalyst, so that the catalytic layer exposes more active surfaces. The invention can effectively shorten the time required for activation, and the whole activation process only needs 4-5 hours, thereby providing a new method for the activation of high-temperature membrane fuel cells.

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 Patents(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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