EFFECTS OF MOLDING PROCESS PARAMETERS ON THE CONDUCTIVITY ENHANCEMENT OF INJECTION MOLDED BIPOLAR PLATE USED FOR FUEL CELL

摘要

The PEMFC of bipolar plate is one of important key components for fuel cell. In this study, PPS+50% carbon fiber (CF) was fabricated by injection molding (IM), injection-compression molding (ICM) and additive changing (PPS+20% CF+30% Graphite). The in-plane conductivity (IPC) measured by four point probe and the through-plane resistance (TPR) measured by contact resistance method for molded were performed. The carbon fiber orientation and bands were examined by SEM. It was found that optimum molding condition improved TPR by 31% and IPC reaches 56S/cm, ICM improved TPR by 39% and IPC reached 73S/cm. For 30% graphite additive replacing CF improved TPR by 88% and IPC reached 124S/cm.