New anhydrous proton exchange membrane for intermediate temperature proton exchange membrane fuel cells

摘要

Herein, we study the preparation and characterization of a new kind of proton exchange membrane. In the proton-conducting membrane of poly(vinylidene fluoride) (PVDF)/poly(ethylene oxide) (PEO)/dodecyl benzenesulfonic acid (DBS-H), we use PEO as "proton solvent" due to its flexible molecular chain. Moreover, the electronegativity of the O atom on PEO may be used to attract protons under anhydrous conditions. The membranes are thermally stable up to 200a°C with less than 3a% mass loss. At 150a°C, without extra humidification, the proton conductivity of 60a% PVDF/22a% PEO/18a% DBS-H membrane is approximately 10 -3 Sacm-1. Second skin: The preparation and characterization of a new kind of proton-exchange for fuel cells (see picture) is described. In the proton-conducting membrane of poly(vinylidene fluoride)/poly(ethylene oxide)/dodecyl benzenesulfonic acid, poly(ethylene oxide) is used as a "proton solvent" due to its flexible molecular chain.