The present study aims to assess the proton conductivities of the most investigated proton exchange membranes (PEMs) used in PEM fuel cells (PEMFCs). Specifically, PEMs are analyzed for their use in anhydrous fuel cells and proton conductivity upper bounds were provided for them. Considering the direct relationship between proton conductivity and temperature, an upper bound is presented. Based on the obtained upper bounds, suitable membranes for high-temperature performance are determined, and the average range of proton conductivity for each polymer group is discussed. By comparing the available proton conductivity data with upper bound, it was demonstrated that some of poly (ionic liquid)s have provided the highest proton conductivities, however aromatic polymers such as polybenzimidazole (PBI) are found more suitable choices for application at anhydrous conditions and high temperatures. The proton conductivity upper bound for anhydrous PEMs demonstrates the availability of promising polymer options for the deployment of anhydrous fuel cells.

本研究旨在评估 PEM 燃料电池 (PEMFC) 中使用的最受研究的质子交换膜 (PEM) 的质子电导率。具体而言，分析了 PEM 在无水燃料电池中的用途，并为其提供了质子传导率上限。考虑到质子电导率和温度之间的直接关系，给出了一个上限。基于获得的上限，确定了适合高温性能的膜，并讨论了每个聚合物基团的质子电导率的平均范围。通过将可用的质子电导率数据与上限进行比较，证明一些聚（离子液体）提供了最高的质子电导率，然而，聚苯并咪唑 (PBI) 等芳香族聚合物被发现更适合在无水条件和高温下应用。无水 PEM 的质子传导率上限证明了用于部署无水燃料电池的有前景的聚合物选项的可用性。