Anion exchange membrane (AEM) fuel cells (AEMFCs) and water electrolyzers (AEMWEs) suffer from insufficient performance and durability compared with commercialized energy conversion systems. Great efforts have been devoted to designing high-quality AEMs and catalysts. However, the significance of the stability of the catalyst layer has been largely disregarded. Here, an in situ cross-linking strategy was developed to promote the interactions within the catalyst layer and the interactions between catalyst layer and AEM. The adhesion strength of the catalyst layer after cross-linking was improved 7 times compared with the uncross-linked catalyst layer due to the formation of covalent bonds between the catalyst layer and AEM. The AEMFC can be operated under 0.6 A cm^–2 for 1000 h with a voltage decay rate of 20 μV h^–1. The related AEMWE achieved an unprecedented current density of 15.17 A cm^–2 at 2.0 V and was operated at 0.5, 1.0, and 1.5 A cm^–2 for 1000 h.

中文翻译：

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稳定耐用、高性能碱性膜燃料电池和水电解槽的催化剂层

与商业化的能量转换系统相比，阴离子交换膜（AEM）燃料电池（AEMFC）和水电解槽（AEMWE）的性能和耐用性不足。为了设计高质量的 AEM 和催化剂，我们付出了巨大的努力。然而，催化剂层稳定性的重要性却被很大程度上忽视了。在此，开发了原位交联策略来促进催化剂层内的相互作用以及催化剂层与 AEM 之间的相互作用。由于催化剂层与AEM之间形成共价键，交联后的催化剂层的粘合强度比未交联的催化剂层提高了7倍。 AEMFC 可在 0.6 A cm ^–2下工作1000 小时，电压衰减率为 20 μV h ^–1。相关的 AEMWE 在 2.0 V 下实现了前所未有的 15.17 A cm ^–2电流密度，并在 0.5、1.0 和 1.5 A cm ^–2下运行了1000 小时。