Aciplex Perfluorosulfonic acid membrane

A number of companies have produced commercial perfluorosulfonic acid membranes, with trade names including Nafion, Flemion, Aciplex, Aquivion, and Fumion [8]. However, since methanol readily transports across these membranes, the efficiency of DMFCs operating with these membranes is rather low, as the methanol reacts at the cathode to produce carbon dioxide and water (reducing the coulombic efficiency of the cell). It is, therefore, important to modify the properties of these membranes to suppress as much as possible the methanol crossover. 

Perfluorosulfonic acid (PFSA) membranes as shown in Fig. 1 were first developed for fuel cells by DuPont as Naflon and installed into the Biosatellite spacecraft in 1967 [1,2]. Various types of PFSA polymers, such as Flemion , Aciplex , and Dow membrane, were developed subsequently. They have excellent chemical stability, high proton conductivity, and high water diffusivity in a wide range of temperatures, brought about by the nature of fluorinated compounds and these non-cross-linked structures [3-5]. 

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