Low-temperature cold start method and system for hydrogen fuel cell
A fuel cell and cold start technology, applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of excessive water and long time consumption in the cooling system
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[0055] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0056] In the embodiment of the present invention, the concentration difference overpotential refers to: the electrochemical reaction of the fuel cell continuously consumes oxygen, which causes the actual partial pressure of oxygen supplied by the air system of the fuel cell (equivalent to the concentration) to be different from the partial pressure of oxygen in the cathode catalyst layer. The partial pressure difference is expressed as the pressure gradient in the gas diffusion layer, which promotes the diffusion of oxygen towards the catalyst layer. The lower the oxygen partial pressure in the catalyst layer, the higher the activation overpotential of the oxygen reduction reaction...
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