| 摘要 |
A flow-field structure (20, 30, 40, 50, 60, 70) for an electrochemical fuel cell plate is manufactured by sequentially depositing layers of a suspension of formable initially liquid material, typically conductive material, such as screen printing ink in which fine graphite particles are suspended, onto a substrate (22, 32, 41) in conformity with a flow-field wall pattern formed in a screen stencil (116) through the porous mesh of which the suspension is passed. The deposited material bonds with the substrate to form flow-channel boundary walls (24, 34, 44) in a three-dimensional pattern conforming to the stencil pattern. Fuel cell plates with complex flow field topographies may be manufactured using this method. Hydrogen can be used as a fuel gas in fuel cells comprising such plates. |
