METHOD FOR MODIFYING SURFACE OF METAL BIPOLAR PLATE AND BIPOLAR PLATE FOR FUEL CELL

• Main Authors: WANG WEN-LIN, HSIEH HO-YEN, HUANG CHING-YING
• Format: Patent
• Language: English
• Published: 20.02.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

A method for modifying the surface of a metal bipolar plate is provided. The method includes the steps of providing a metal substrate having a conducting adhesion layer on a surface thereof, the metal substrate having a flow field structure at the surface thereof; applying expanded graphite powder onto the conducting adhesion layer; and press-fitting the expanded graphite powder and the metal substrate with a mold structurally corresponding to the flow field structure, to form a graphite layer covering the surface the metal substrate from the expanded graphite powder. A bipolar plate for a fuel cell is further provided.