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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication of electrically conductive polymer composites for bipolar plate by two-step compression molding technique
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Fabrication of electrically conductive polymer composites for bipolar plate by two-step compression molding technique

机译：两步压缩成型技术制备双极板用导电聚合物复合材料

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Electrically conductive polymer composites for bipolar plate were fabricated by two-step compression molding technique. Raw materials consisted of natural graphite flakes (G), expanded graphite (EG), carbon black (CB), and phenol resin (PF). The G/EG/CB/PF composites were first compressed at a temperature lower than curing point (100°C) and then cured at a high temperature above curing point (150°C) and high pressure (10 MPa). Results showed that G and EG are oriented in the direction parallel to the composite plate surface. CB is dispersed not only in the phenol resin matrix but also in the packing and porous space of G and EG. The addition of EG and CB significantly increases number of the electrical channels and thus enhances the electrical conductivity of the composite. Under optimal conditions, electrical conductivity and flexural strength of the composite were 2.80 × 10 ~4 S/m and 55 MPa, respectively, suggesting that the dipolar plates prepared by two-step compression molding technique are adequate to meet the requirement of proton exchange membrane fuel cells.
机译：通过两步压缩成型技术制备了用于双极板的导电聚合物复合材料。原材料包括天然石墨片（G），膨胀石墨（EG），炭黑（CB）和酚醛树脂（PF）。首先在低于固化点（100°C）的温度下压缩G / EG / CB / PF复合材料，然后在高于固化点（150°C）的高温和高压（10 MPa）下固化。结果表明，G和EG在平行于复合板表面的方向上取向。 CB不仅分散在酚醛树脂基体中，而且分散在G和EG的堆积和多孔空间中。 EG和CB的添加显着增加了电通道的数量，因此提高了复合材料的电导率。在最佳条件下，复合材料的电导率和抗弯强度分别为2.80×10〜4 S / m和55 MPa，这表明通过两步压缩成型技术制备的偶极板足以满足质子交换膜的要求。燃料电池。

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