Kim Je-Deok, Ohira Akihiro, Nakao Hidenobu
Hydrogen Production Materials Group, Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
Energy Storage Technology Group, Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
Membranes (Basel). 2020 Feb 18;10(2):31. doi: 10.3390/membranes10020031.
Sulfonated polyphenylsulfone (SPPSU) with a high ion exchange capacity (IEC) was synthesized using commercially available polyphenylsulfone (PPSU), and a large-area (16 × 18 cm) crosslinked sulfonated polyphenylsulfone (CSPPSU) membrane was prepared. In addition, we developed an activation process in which the membrane was treated with alkaline and acidic solutions to remove sulfur dioxide (SO), which forms as a byproduct during heat treatment. CSPPSU membranes obtained using this activation method had high thermal, mechanical and chemical stabilities. In I-V studies for fuel cell evaluation, high performances similar to those using Nafion were obtained. In addition, from the hydrogen (H) gas crossover characteristics, the durability is much better than that of a Nafion212 membrane. In the studies evaluating the long-term stabilities by using a constant current method, a stability of 4000 h was obtained for the first time. These results indicate that the CSPPSU membrane obtained by using our activation method is promising as a polymer electrolyte membrane.
采用市售聚亚苯基砜（PPSU）合成了具有高离子交换容量（IEC）的磺化聚亚苯基砜（SPPSU），并制备了大面积（16×18 cm）的交联磺化聚亚苯基砜（CSPPSU）膜。此外，我们开发了一种活化工艺，其中用碱性和酸性溶液处理该膜以去除在热处理过程中作为副产物形成的二氧化硫（SO）。使用这种活化方法获得的CSPPSU膜具有高热稳定性、机械稳定性和化学稳定性。在用于燃料电池评估的I-V研究中，获得了与使用Nafion时相似的高性能。此外，从氢气（H）气体渗透特性来看，其耐久性比Nafion212膜要好得多。在通过恒流法评估长期稳定性的研究中，首次获得了4000 h的稳定性。这些结果表明，通过我们的活化方法获得的CSPPSU膜有望作为聚合物电解质膜。
