Abstract Lifetime is always one of the core concerns of proton exchange membrane fuel cell, especially in commercial utilization. Membrane failure caused by chemical degradation can lead to crash of the whole fuel cell system. Proton exchange membranes with enhanced chemical durability can be fabricated via the addition of free radical scavengers. Free radical scavengers are a series of compounds that can react with harmful radicals preferentially than ionomers, with the membranes protected. This review presents the free radical scavengers that had been applied to proton exchange membranes. The mechanisms of the additives in scavenging radicals are discussed in detail. Meanwhile, the challenges and drawbacks of free radical scavengers need to be addressed are also highlight.

中文翻译：

---

了解用于高度耐用质子交换膜的自由基清除剂

摘要 寿命一直是质子交换膜燃料电池的核心问题之一，尤其是在商业应用中。由化学降解引起的膜失效会导致整个燃料电池系统崩溃。可以通过添加自由基清除剂来制造具有增强化学耐久性的质子交换膜。自由基清除剂是一系列化合物，可以比离聚物优先与有害自由基反应，并保护膜。本综述介绍了应用于质子交换膜的自由基清除剂。详细讨论了添加剂清除自由基的机制。同时，自由基清除剂的挑战和弊端也需要解决。