Fabrication and characterisation of the Graphite Bi-Polar Plates used in a 0.25 kW pafc Stack

摘要

The graphite bi-polar plates were fabricated using lamination technique with polyether sulfone (PES) films (50 μm) and graphite foils (400μm) in between the two porous graphite plates (CBC) by keeping in a specially designed and fabricated fixture with stainless steel plates at the top and bottom. The fixture was then kept in an hydraulic hot press, at loads of 10-20 tons, and heat treated at 410 deg. C for 30 min. Then these graphite plates were sized to 30 cm ×20 cm × 0.64 cm, leaving 0.4 mm thick graphite foil at the centre of the plate, to avoid the intermixing of the hydrogen and oxygen/air.