Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7705624 | International Journal of Hydrogen Energy | 2018 | 9 Pages |
Abstract
A facile method has been suggested for the preparation of poly [2,2â²-(p-oxydiphenylene)-5,5â²-benzimidazole] (OPBI) membrane that comprises of dense and porous layers for high temperature proton exchange membrane fuel cells (HT-PEMFCs). The porosity as well as the asymmetry of the membrane is formed by the use of component solvent at steadily increasing temperatures. This approach needs not to use any porogen, whereas the resultant asymmetric OPBI membrane indicates an improved phosphoric acid (PA) doping level together with mechanical strength. For instance, the PA doping level of the asymmetric OPBI membrane is almost twice as much as that of the homogenous dense OPBI membrane. The conductivity of asymmetric OPBI arrived at 0.072 S cmâ1 at 180 °C. The membrane electrode assembly (MEA) based on the asymmetric OPBI demonstrated an exceptional fuel cell functionality with a peak power density of 393 mW cmâ2 at 160 °C under anhydrous conditions.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Tengjiao Ou, Haixin Chen, Bihua Hu, Haitao Zheng, Weihua Li, Yi Wang,