Rapid low-cost activation method for membrane electrode of proton exchange membrane fuel cell

Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a rapid low-cost activation method for a membrane electrode of a proton exchange membrane fuel cell. The activation method comprises the following steps: introducing dry nitrogen into two poles of a single cell or an electric pile for safe purging and removing air and impurities in the fuel cell; heating the single cell or electric pile; introducing humidified hydrogen into an anode and a cathode of the cell respectively, keeping the hydrogen in the cell, and carrying out discharge-free wet hydrogen treatment on the single cell or the electric pile of the fuel cell; and stopping hydrogen supply, discharging residual gas and the like. The non-discharge wet hydrogen activation method is adopted, so that the catalyst activity of the proton exchange membrane fuel cell can be improved, the activation time can be greatly shortened, the gas fuel consumption is reduced, and the activation cost is greatly reduced. According to the activation method, MEA can be rapidly activated without using an electronic load and consuming a large amount of hydrogen, the energy is saved, the cost is reduced, and the defects of a pre-activation (non-discharge) method and a discharge activation method are overcome.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, in particular to a fast and low-cost activation method for membrane electrodes of proton exchange membrane fuel cells. Background technique [0002] The core component of the proton exchange membrane fuel cell (PEMFC) is the membrane electrode MEA (Membrane Electrode Assembly), and its performance largely determines the performance of the PEMFC. The performance of several main components of MEA (electrocatalyst, proton exchange membrane and diffusion layer) and the preparation process of MEA have a great influence on its performance, but in order to make PEMFC quickly reach its best state and In terms of working performance, before the MEA is prepared and assembled into a fuel cell for normal test operation, the MEA is usually activated. In addition, for the performance attenuation caused by the long-term storage of the PEMFC, it can also be activated by the MEA. recover the performance of PE...

AI Technical Summary

Problems solved by technology

[0004] Traditional pre-activation methods such as boiling MEA in boiling water, PEMFC water injection and soaking and wetting cannot be used alone. It is necessary to combine the discharge activation method to further activate PEMFC, which only speeds up the activation speed to a certain extent, and still requires the use of electronic loads and other power-consuming equipment, and need to use a large amount of hydrogen, energy consumption, resulting in high activation costs

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