Ishimoto Takayoshi, Koyama Michihisa
INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Membranes (Basel). 2012 Jul 10;2(3):395-414. doi: 10.3390/membranes2030395.
Chemical degradation of perfluorosulfonic acid (PFSA) membrane is one of the most serious problems for stable and long-term operations of the polymer electrolyte fuel cell (PEFC). The chemical degradation is caused by the chemical reaction between the PFSA membrane and chemical species such as free radicals. Although chemical degradation of the PFSA membrane has been studied by various experimental techniques, the mechanism of chemical degradation relies much on speculations from ex-situ observations. Recent activities applying theoretical methods such as density functional theory, in situ experimental observation, and mechanistic study by using simplified model compound systems have led to gradual clarification of the atomistic details of the chemical degradation mechanism. In this review paper, we summarize recent reports on the chemical degradation mechanism of the PFSA membrane from an atomistic point of view.
全氟磺酸（PFSA）膜的化学降解是聚合物电解质燃料电池（PEFC）稳定长期运行面临的最严重问题之一。化学降解是由PFSA膜与自由基等化学物质之间的化学反应引起的。尽管已经通过各种实验技术对PFSA膜的化学降解进行了研究，但化学降解的机制很大程度上依赖于非原位观察的推测。最近应用密度泛函理论等理论方法、原位实验观察以及使用简化模型化合物系统进行的机理研究，使得化学降解机理的原子细节逐渐明晰。在这篇综述论文中，我们从原子角度总结了关于PFSA膜化学降解机理的最新报道。
