质子交换膜燃料电池的垫片机械性能研究

Mechanical Properties of Gaskets for Proton Exchange Membrane Fuel Cell

为了将石墨复合材料用于燃料电池的双极板材料中,研究了湿度环境对双极板力学性能的影响。制造了两种类型的样品,对两种样品进行了一系列的实验:吸水率、弯曲和拉伸试验的强度和模量。结果表明,添加石墨复合材料的试样吸水率低于没有石墨/环氧复合材料碳纤维织物的试样,所以有碳纤维织物试样的总吸水率较低。两种试样的弯曲强度和模量均会下降。另外在石墨-颗粒/环氧复合材料中加入碳纤维织物能够显著提高了拉伸强度。

In order to use graphite composite material in the bipolar plate material of fuel cell,the influence of humidity environment on mechanical properties of bipolar plate was studied.Two types of samples were made and a series of experiments were conducted on the two samples:water absorption,strength and modulus of bending and tensile tests.The results showed that the water absorption of the graphite composite material was lower than that of the graphite/epoxy composite carbon fiber fabric,so the total water absorption of the carbon fiber fabric samples was lower.The flexural strength and modulus of both specimens decrease.In addition,the graphite-particle/epoxy composites with carbon fiber fabric can significantly improve the tensile strength.