Improvement of Electrical Properties of PAFC Separator Material by Carbon Black Addition

This study was improved electrical conductivity and mechanical properties by adding carbon black to the matrix for polymer base conductive composite. The produced composites were characterized using electrical non-resistance tests, Raman Spectrometers, scanning electron microscope (SEM), optical microscope (OM), X-Ray Diffraction (XRD), three-point bending tests, and specific gravity test. When the additive ratio of carbon black increased from 0 wt.{\%} to 3.0 wt.{\%}, densities and electrical non-resistance were reduced, and the amount of carbon black particles exposed to the surface of the grain in fluorinated ethylene-propylene (FEP) increased. Also, there was about 30{\%} improvement in bending strength when carbon black was added 2.0 wt.{\%} compared to 0 wt.{\%}. Overall, the method of adding carbon black to the matrix of conductive composite material can be a simple method of improving mechanical properties while improving electrical conductivity.