BIPOLAR PLATE FOR FUEL CELL AND METHOD OF PRODUCTION THEREOF Russian patent published in 2008 - IPC H01M8/02 H01M8/10 

FIELD: physics.

SUBSTANCE: invention refers to bipolar plates (BP) designed for reagent distribution in fuel cell (FC) battery and electric switching of FC in the battery. According to invention, BP for FC contains metal base and carbon layers. The base layer is coated with intermediate layer made of mixed powder of low-density graphite and polytetrafluorethylene (PTFE) of 0.5-2.0 mass % and sheet extracted from nonporous powder mix e.g. natural graphite and PTFE of 10÷20 mass %. Base is made of steel, aluminium, its alloys, copper and its alloys. Method of BP production includes manufacturing base layer coated with carbon layers and layer package assembly. The base layer is covered with intermediate layer of mixed powder of low-density graphite and polytetrafluorethylene (PTFE) of 0.5÷2.0 mass %, coated with sheet extracted from nonporous powder mix, e.g. natural graphite and PTFE of 10÷20 mass %. Package is heated to temperature of 120÷170°C at pressure of 200÷300 kg/cm².

EFFECT: BP with improved manufacturability, raised electrical conduction and oxygen chemical stability.

4 cl, 1 ex