Patent ID: 7090793

Claim:
A method for preparing a fuel cell composite bipolar plate, which comprises: a) compounding a mixture comprising a graphite powder, and a vinyl ester resin, a mold releasing agent in an amount of 1–10%, based on the weight of said vinyl ester resin, and a solvent in an amount of 10–35%, based on the weight of said vinyl ester resin to form a homogeneous bulk molding compound material, wherein said material comprises 60 to 80 wt % of said graphite powder, based on the weight of said material; b) molding the material from step a) to form a bipolar plate having a desired shape at 80–200° C. and 500–4000 psi; wherein particles of said graphite powder have a size of 10–80 mesh, less than 10 wt % of the particles of the graphite powder are larger than 40 mesh, and the remaining particles of the graphite powder have a size of 40–80 mesh; wherein said vinyl ester is selected from the group consisting of bisphenol-A epoxy-based methacrylate, bisphenol-A epoxy-based acrylate, tetrabromo bisphenol-A epoxy-based methacrylate, and phenol-novolac epoxy-based methacrylate.