柔性石墨极板脊背成型质量对面比电阻及抗压强度的影响

Influence of Flexible Graphite Polar Plate Landing Quality on Area Specific Resistance and Compressive Strength

本文使用两种新脊背成型工艺制备柔性石墨极板,并对比普通成型工艺,研究极板脊背成型质量对面比电阻及其工程抗压强度的影响。结果显示,脊背轮廓填充效果随着工艺的改进有着显著的提升,对应区域的浸渍率越高,面比电阻和工程抗压强度越大。脊背填充质量从低到高对应的浸渍率分别为38.25%、45.37%和49.64%。普通成型工艺材料的面比电阻最小,1.5MPa载荷对应的面比电阻为3.93mΩ·cm~2,工程抗压强度为3.22MPa。中等质量成型工艺和高质量成型工艺对应1.5MPa载荷的材料面比电阻分别为4.86和4.99mΩ·cm~2,工程抗压强度分别为4.03MPa和4.56MPa。

In this paper,two new landing forming processes were used to prepare flexible graphite polar plates,and the effects of the landing forming quality on the area specific resistance and engineering compressive strength of the polar plates were investigated in comparison with the common forming process.The results show that the landing filling effect has a significant improvement with the improvement of the process,and the higher the impregnation rate of the corresponding area,the higher the area specific resistance and engineering compressive strength.The filling quality of the landings from low to high corresponds to impregnation rates of 38.25%,45.37%and 49.64%,respectively.The area specific resistance of the material for the common forming process was the smallest.The area specific resistance for 1.5 MPa load is 3.93 mΩ·cm~2 and the engineering compressive strength is 3.22 MPa.The area specific resistance for the medium-quality and high-quality landing forming processes corresponding to the 1.5 MPa load were 4.86 and 4.99mΩ·cm~2,respectively,and the engineering compressive strengths were 4.03 MPa and 4.56 MPa,respectively.