Wu Liang, Huang Chuanhui, Woo Jung-Je, Wu Dan, Yun Sung-Hyun, Seo Seok-Jun, Xu Tongwen, Moon Seung-Hyeon
Laboratory of Functional Membranes, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.
J Phys Chem B. 2009 Sep 10;113(36):12265-70. doi: 10.1021/jp905778t.
Different from H(3)O(+) transport as in the vehicle mechanism, protons find another channel to transfer through the poorly hydrophilic interlayers in a hydrated multiphase membrane. This membrane was prepared from poly(phthalazinone ether sulfone kentone) (SPPESK) and H(+)-form perfluorosulfonic resin (FSP), and poorly hydrophilic electrostatically interacted acid-base pairs constitute the interlayer between two hydrophilic phases (FSP and SPPESK). By hydrogen bonds forming and breaking between acid-base pairs and water molecules, protons transport directly through these poorly hydrophilic zones. The multiphase membrane, due to this unique transfer mechanism, exhibits better electrochemical performances during fuel cell tests than those of pure FSP and Nafion-112 membranes: 0.09-0.12 S cm(-1) of proton conductivity at 25 degrees C and 990 mW cm(-2) of the maximum power density at a current density of 2600 mA cm(-2) and a cell voltage of 0.38 V.
与车辆机制中的H(3)O(+)传输不同，质子在水合多相膜中通过亲水性较差的中间层找到了另一种传输通道。该膜由聚（酞嗪酮醚砜酮）（SPPESK）和H(+)型全氟磺酸树脂（FSP）制备而成，亲水性较差的静电相互作用酸碱对构成了两个亲水相（FSP和SPPESK）之间的中间层。通过酸碱对与水分子之间氢键的形成和断裂，质子直接通过这些亲水性较差的区域传输。由于这种独特的传输机制，该多相膜在燃料电池测试中表现出比纯FSP膜和Nafion - 112膜更好的电化学性能：在25℃时质子传导率为0.09 - 0.12 S cm(-1)，在电流密度为2600 mA cm(-2)和电池电压为0.38 V时最大功率密度为990 mW cm(-2)。
