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A bipolar plate and a fuel cell are provided. The bipolar plate for the fuel cell has a plurality of flow channels, and a rib is defined between neighboring two flow channels. A top surface of the rib may be a roughened surface or have a porous structure in order to improve performance of the fuel c

A bipolar plate and a fuel cell are provided. The bipolar plate for the fuel cell has a plurality of flow channels, and a rib is defined between neighboring two flow channels. A top surface of the rib may be a roughened surface or have a porous structure in order to improve performance of the fuel cell.

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1. A bipolar plate for a fuel cell, the bipolar plate having a plurality of flow channels, wherein a rib is defined between neighboring two of the flow channels, and the bipolar plate is characterized in that: a porous structure is laminated on a top of the rib through a porous material lamination t

1. A bipolar plate for a fuel cell, the bipolar plate having a plurality of flow channels, wherein a rib is defined between neighboring two of the flow channels, and the bipolar plate is characterized in that: a porous structure is laminated on a top of the rib through a porous material lamination technique, the rib is nonporous, and a thickness of the porous structure is 1/10 to 3/10 of a thickness of the rib. 2. The bipolar plate for the fuel cell according to claim 1, wherein the porous structure comprises a conductive material and a hydrophobic material. 3. The bipolar plate for the fuel cell according to claim 2, wherein the conductive material comprises carbon black, graphite, carbon fiber or metal. 4. The bipolar plate for the fuel cell according to claim 2, wherein the hydrophobic material comprises tetrafluoroethylene. 5. The bipolar plate for the fuel cell according to claim 2, wherein an addition amount of the hydrophobic material is less than 60 wt %. 6. The bipolar plate for the fuel cell according to claim 1, wherein the porous structure has a porosity range of approximately 30% to 80% and hydrophobicity. 7. The bipolar plate for the fuel cell according to claim 1, wherein a material of the bipolar plate comprises metal, graphite, or a composite material. 8. A fuel cell, comprising: a plurality of bipolar plates, wherein each of the bipolar plates has a plurality of flow channels, and a rib is defined between neighboring two of the flow channels; andat least one membrane electrode assembly (MEA), disposed among the bipolar plates, wherein a porous structure, laminated on a top of the rib through a porous material lamination technique, the rib is nonporous, a thickness of the porous structure is 1/10 to 3/10 of a thickness of the rib, and the porous structure is compressed in contact with the membrane electrode assembly. 9. The fuel cell according to claim 8, wherein the porous structure comprises a conductive material and a hydrophobic material. 10. The fuel cell according to claim 9, wherein the conductive material comprises carbon black, graphite, carbon fiber, or metal. 11. The fuel cell according to claim 9, wherein the hydrophobic material comprises tetrafluoroethylene. 12. The fuel cell according to claim 9, wherein an addition amount of the hydrophobic material is less than 60 wt %. 13. The fuel cell according to claim 8, wherein the porous structure has a porosity range of approximately 30% to 80% and hydrophobicity. 14. The fuel cell according to claim 8, wherein a material of the bipolar plate comprises metal, graphite, or a composite material. 15. The fuel cell according to claim 8, wherein the porous structure is compressed in contact with a gas diffusion layer of the membrane electrode assembly.