| 摘要 |
PROBLEM TO BE SOLVED: To provide a separator member for a solid polymer fuel cell and a manufacturing method of the same, wherein the separator member is capable of improving and stably maintaining cell performance by solving problems of gas leak of fuel gas or oxidizing gas by restraining breakage and fracture of the separator member in starting, stopping, and normally operating a cell, and further in assembling a cell stack. SOLUTION: This separator member is formed with carbon-resin curable molding containing 40-90 wt.% carbon powder and 60-10 wt.% thermosetting resin, having bending strength >=30 MPa at room temperature, decreasing rate of the bending strength <=30% at room temperature to 100 deg.C, camber <=0.5 mm, Shore hardness <=100, bending elasticity <=20 GPa, and thickness accuracy within ±0.05 mm. The carbon powder and the thermosetting resin are mixed at a predetermined weight ratio, and are crushed and sieved. The crushed powder <=40 mesh are loaded in a die. After pre-loading, the die is opened and gas is discharged and eliminated, and then hot- pressing molding at room temperature to 280 deg.C under 20-400 MPa is provided. After releasing from the die, the molding is held between flat and smooth plates and is heated at 150-280 deg.C for more than five minutes to provide thermosetting process. |
