Quan Yizhou, Wang Gang, Li Anfeng, Wei Xiaoyan, Li Feng, Zhang Jie, Chen Jinwei, Wang Ruilin
College of Materials Science and Engineering, Sichuan University Chengdu 610065 China
RSC Adv. 2019 Jan 29;9(7):3838-3846. doi: 10.1039/c8ra09695c. eCollection 2019 Jan 25.
A novel sulfonated poly(ether ether ketone)/triphenylamine hybrid membrane with various triphenylamine loadings (1%, 2% and 5%) has been successfully fabricated. Optimum triphenylamine loading was confirmed by exploring the physicochemical properties and morphology of different membranes. The hybrid membrane exhibited lower vanadium permeability than pristine SPEEK membranes due to the acid-base interaction between amine groups and sulfonated groups. Introduction of triphenylamine also improved the proton conductivity because the nitrogen atom of triphenylamine can be protonated and contribute to the proton transfer. As the result, the hybrid membrane demonstrated higher ion selectivity compared with SPEEK and Nafion115 membranes. The VRFB single cell with SPEEK/TPAM-1% membrane showed better performance compared to a Nafion115 membrane at the current density of 60 mA cm. The SPEEK/TPAM hybrid membrane has great potential for VRFB application.
一种具有不同三苯胺负载量（1%、2%和5%）的新型磺化聚醚醚酮/三苯胺杂化膜已成功制备。通过探究不同膜的物理化学性质和形态，确定了最佳的三苯胺负载量。由于胺基与磺化基团之间的酸碱相互作用，杂化膜表现出比原始磺化聚醚醚酮膜更低的钒渗透率。三苯胺的引入还提高了质子传导率，因为三苯胺的氮原子可以被质子化并有助于质子转移。结果，与磺化聚醚醚酮膜和Nafion115膜相比，杂化膜表现出更高的离子选择性。在60 mA cm的电流密度下，具有磺化聚醚醚酮/三苯胺-1%膜的全钒液流电池单电池表现出比Nafion115膜更好的性能。磺化聚醚醚酮/三苯胺杂化膜在全钒液流电池应用中具有巨大潜力。
