АКТИВНЫЙ СЛОЙ КАТОДА ТОПЛИВНОГО ЭЛЕМЕНТА С ПОЛИМЕРНЫМ ЭЛЕКТРОЛИТОМ: КОМПЬЮТЕРНОЕ МОДЕЛИРОВАНИЕ ПРОЦЕССА ВЛАГООБМЕНА В ЗЕРНАХ ПОДЛОЖКИ

In the cathode active layer of a fuel cell with a solid polymer electrolyte process, the current generation takes place in support grains (agglomerates of carbon particles with supported platinum). The speed of this process essentially depends on a degree of support grains pores filling with water. Calculations show if support grains pores are completely filled with water the overall current density in the cathode active layer is much less than in the case of the pores partially or even completely free of water. The last variant of a cathode active layer functioning is realized when the release rate of pores from moisture due to evaporation and filtration of water exceeds the rate of flooding process of ones with water in the process of current generation. This study by method of computer simulation presents a specific example of determining the overall current density in the cathode active layer with varying the speed of emptiness process in pores from moisture due to filtration.