▎ 摘　　要

NOVELTY - Flow field plate (18) comprises an electrically conductive substrate at least partially defining several flow channels, and a carbon layer arranged over the flow field plate. The carbon layer comprises a component including graphene and/or carbon nanotubes. The carbon layer has a thickness of less than 10 nm. USE - The flow field plate is useful for a fuel cell (claimed). ADVANTAGE - The flow field plate has reduced contact resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing flow field plate, comprising contacting electrically conductive substrate with a vapor of 1-18C hydrocarbonaceous compound at 350-600 degrees C to form a carbon layer, where the carbon layer comprises at least one graphene monolayer. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of fuel cell system having carbon coated bipolar plate. Proton exchange membrane fuel cell (10) Cathode catalyst layer (14) Anode catalyst layer (16) Flow field plate (18) Polymeric ion-conducting membrane (19)