Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7720417 | International Journal of Hydrogen Energy | 2014 | 10 Pages |
Abstract
A novel series of sulfonated poly(arylene ether sulfone)s (SPAESs) containing fluorophenyl pendant groups are successfully developed and their membranes are evaluated in low-temperature proton exchange membrane fuel cells. The SPAESs are synthesized from 4,4â²-dichlorodiphenylsulfone (DCDPS), 3,3â²-disulfonate-4,4â²-dichlorodiphenylsulfone (SDCDPS), and (4-fluorophenyl)hydroquinone by nucleophilic aromatic substitution polycondensation. The structure and properties of SPAESs membranes are characterized using 1H-NMR, EA, FT-IR, TG, and DSC, along with the proton conductivity, water uptake, ion exchange capacity and chemical stability. A maximum proton conductivity of 0.35 S cmâ1 at 90 °C is achieved for SPAES membrane with 50% SDCDPS. These SPAES membranes display high dimensional stability and oxidative durability, due to the introduction of fluorophenyl pendant groups on the polymer backbone. The fuel cell performances of the MEAs with SPAES reaches an initial power density of 120.6 mW cmâ2 at 30 °C, and greatly increases to 224.3 mW cmâ2 at 80 °C using H2 and O2 gases.
Related Topics
Physical Sciences and Engineering
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Authors
Guang Li, Juan Xie, Hefei Cai, Jinli Qiao,