Method for enhancing running durability of fuel cell

Abstract

The invention relates to a method for enhancing the running durability of a fuel cell. In the method, the service life of the fuel cell is prolonged by setting the shutdown program of the fuel cell. The shutdown program comprises the following specific steps of: (1) keeping hydrogen supply to the anode side of the fuel cell so as to keep fuel hydrogen sufficient; (2) shutting down an air supply fan on the cathode side of the fuel cell; (3) connecting a controllable switch to the output end of the fuel cell, switching off the controllable switch to short-circuit the fuel cell and rising the temperature of the fuel cell to the set temperature in a short-circuited state; and (4) draining water accumulated in a fuel cell stack, stopping the hydrogen supply and lowering the temperature of the fuel cell under the natural condition or forced air convection condition. Compared with the prior art, the method has the advantages of simpleness, good effect and the like.

Description

technical field [0001] The present invention relates to a fuel cell, in particular to a method for improving the running durability of the fuel cell. Background technique [0002] Compared with traditional energy storage batteries, fuel cells have many advantages such as environmental protection, no pollution, no noise, light weight, easy maintenance, recyclable materials, no short-board effect of battery charge and discharge, and no battery discharge when the battery is not working. much attention. [0003] Fuel cells must solve several key problems in the process of industrialization, one is the life of the fuel cell, and the other is the cost of the fuel cell. With regard to the cost of fuel cells, through the extensive work of many scientific researchers, the current price has dropped significantly, and has already competed with traditional energy storage batteries in some industries. Regarding the service life of fuel cells, many scientific researchers have done a lot...

AI Technical Summary

Problems solved by technology

[0008] At present, there are still some problems in the fuel cell as follows: 1. After the fuel cell is turned off, it is stored statically. After a long period of non-working state, the fuel cell is started, and the performance of the fuel cell is obviously reduced. It is difficult to achieve the performance of the fuel cell when it was shut down last time. , seriously affecting the life of the fuel cell

[0009] It is generally believed that the main reason for the above-mentioned impact on the stability of the fuel cell is that after the fuel cell has been in operation for a long time, the electrodes of the fuel cell, especially the cathode, have been at high potential for a long time, in an acidic environment, and the surface of the metal Pt in the catalyst It is easy to generate an oxidized PtO+, which is dissolved and combined with the sulfonate under the action of the acidic sulfonate of the resin, which affects the proton-conducting performance of the membrane.

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