▎ 摘　　要

NOVELTY - The plate has a titanium substrate (1) whose surface is provided with multiple graphene holes. A graphene layer (3) is provided on a graphene surface of the titanium substrate. A gold layer (2) is arranged on the surface of the substrate. The gold layer covers a graphene portion of a barrier layer. The graphene layer passes through a graphene diffusion part (4) to diffuse the gold layer and the titanium substrate. USE - Bipolar plate for a fuel cell. ADVANTAGE - The plate improves bonding firmness between the gold layer and the titanium metal bipolar plate, and solving problem that gold layer is easy to fall off from the titanium substrate. The plate allows the surface of the titanium base plate to be provided with a gold layer so as to protect the base plate, thus improving corrosion resistance of the bipolar plate. The graphene diffusion part is diffused into the micro-pore, graphene diffusion unit and the micro pore interaction, so that the graphene layer and gold layer, titanium substrate are tightly connected, thus providing strong bonding force between the graphene and titanium substrate, and hence avoiding scratch of the graphene. The plate separates a negative electrode and a positive electrode from each other so as to prevent reaction gas from mixing each other, and realize uniformly distributing of the reaction gas, remove water outgrowth and bear the assembling pre-tightening force. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a bipolar plate of a fuel cell. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a bipolar plate of a fuel cell. 1Titanium substrate 2Gold layer 3Graphene layer 4Graphene diffusion part