METHOD OF FABRICATING FUEL CELL BIPOLAR PLATE AND BIPOLAR PLATE TO HAVE BEEN FABRICATED THROUGH PROPOSED METHOD

摘要

FIELD: electricity. ^ SUBSTANCE: invention deals with bipolar plates designed to provide for dispensation of reactants with fuel cell batteries and electrical commutation between the battery fuel cells. Method proposed envisages fabrication of fuel cell bipolar plates of suitable sheet material prepared by way of shaping and application of carbon coating. Its specificity consists in the sheet material being manufactured of thermally expanded graphite through graphite particles consolidation, rolling and intermediate annealing, cylinder rolled or pressed into shape and applied carbon material coating on through pulse pyrolytic saturation at temperature of 600-1000C, the weight increment as a result of the coating application as compared to the sheet material pre-product amounting to 210%. The fuel cell bipolar plate thus fabricated is composed of conductive shaped sheet and a carbon coating; its density is equal to 11.2 g/cm3 with specific resistivity in the direction perpendicular to the bipolar plate plane amounting to 0.030.05 Ohmcm. ^ EFFECT: improved electrical conductivity and chemical resistance in oxygen atmosphere. ^ 2 cl, 1 ex