Active water-draining type fuel cell

Abstract

The invention discloses an active water-draining type fuel cell. The active water-draining type fuel cell comprises a positive electrode structure, a negative electrode structure, a proton exchange membrane positioned between the positive electrode structure and the negative electrode structure, and a water-draining apparatus, wherein the positive electrode structure comprises a positive electrode runner plate, a positive electrode dispersion layer and a positive electrode catalytic layer which are arranged from the top to bottom in sequence; the positive electrode catalytic layer is connected with the proton exchange membrane; the negative electrode structure comprises a negative electrode catalytic layer, a negative electrode dispersion layer and a negative electrode runner plate which are arranged in sequence; the negative electrode catalytic layer is connected with the proton exchange membrane; the negative electrode runner plate comprises a porous carbon core layer and a graphite base layer; the upper part of the porous carbon core layer is connected with the negative electrode dispersion layer while the lower part of the porous carbon core layer is connected with the graphite base layer; and one end of the porous carbon core layer extends to be connected with the water-draining apparatus. The active water-draining type fuel cell has the beneficial effects as follows: the negative electrode runner plate adopts the porous carbon core layer and the graphite base layer, so that liquid water generated by a reaction in the fuel cell can be led out actively so as to effectively prevent from water logging; and in addition, the additionally provided water-draining apparatus is simple in structure and easy to realize.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an active drainage type fuel cell. Background technique [0002] A hydrogen-oxygen fuel cell is a device that generates electricity by reacting hydrogen and oxygen through a cell, which includes end plates, flow field plates, diffusion layers, catalytic layers, and proton exchange membranes. Hydrogen is used as a fuel, and a chemical reaction occurs in the membrane electrode. The specific reaction is as follows: [0003] Anode: H 2 -2e=2H + , [0004] Cathode: 1 / 2O 2 +2H + +2e=H 2 o [0005] Overall reaction: H 2 +1 / 2O 2 =H 2 o [0006] The reactant of the hydrogen-oxygen fuel cell is water, and it mainly exists in the cathode, so the cathode is most likely to have water flooding, and the water flooding phenomenon is more serious when working at a high current density, and the water flooding phenomenon seriously affects the performance of the fuel cell. . Accordin...

AI Technical Summary

Problems solved by technology

Although these methods alleviate the degree of water flooding in the battery to a certain extent, they are costly and complicated to process. These methods are no longer applicable when the working state of the battery changes. Therefore, it is particularly important to seek more efficient cathode drainage measures.

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