燃料电池质子交换膜中物质传导过程探讨

Study on mass transport through the proton-exchange membrane

本文通过对合成的磺酸型质子交换膜吸性和导电性的分析 ,发现膜中水的存在对质子导电性有很大的影响 ,并从理论上分析了水与质子在膜中的传递过程 ,认为质子在膜中的传递遵循“似液体”理论 ,水的存在对导质子起促进作用。水在膜中有液态和气态两种存在形式 ,电渗作用和扩散作用分别使水向相反的方向运动 ,从而保持膜中水平衡。

The water uptake and ion conductivity of the sulfonic acid membrane were investigated.The results indicate that the water uptake effect the ion conductivity of the membranes.Based on the theorical analysis,the proton follows the 'Liquid-like'proton conductivity mechanism when it transports though the membrane.There are liquid water and gas water in the membrane,both of which improve the proton conductivity,and the electro-osmotic drag and diffusion of water make the water balance in the membrane.