【摘要】 通过将全氟磺酸溶液加入到PTFE多孔膜中制备了PFSI/PTFE复合膜。SEM的测试结果显示,已有一层均匀的薄的PFSI膜存在于PTFE多孔膜表面,全氟磺酸树脂已均匀地分布到PTFE多孔膜中。实验证明,复合膜的强度和尺寸稳定性都优于单膜;厚度为40μm的复合膜,其电性能与厚度为60μm的单膜接近,复合膜最低膜厚可达20μm。用价格相对便宜的PTFE来部分代替昂贵的全氟磺酸树脂,可以减少全氟树脂的用量,降低质子交换膜燃料电池的制造成本。更多还原

【Abstract】 PFSI/PTFE composite membranes were prepared by impregnating PFSI solution into porous PTFE films.According to the SEM photomicrographs,a homogeneous thin PFSI film is formed on PTFE film surface,and the PFSI is dispersed in it evenly.The strength and dimension stability of the composite membrane was supeior to that of the homogeneous membrane due to the enforcement of PTFE films.The fuel cell performance of the 40μm thickness composite membrane appeared to be exactly the same as those of the 60μm thickness homogeneous membrane,the lowest thickness of prepared composite membrane is 20μm.As the expensive PFSI resins were replaced by relative lower PTFE,less amount of PFSI was used and PEMFC has much lower prices.更多还原