Metal–air fuel cells with high energy density, eco‐friendliness, and low cost bring significantly high security to future power systems. However, the impending challenges of low power density and high‐current‐density stability limit their widespread applications. In this study, an ultrahigh‐power‐density Zn–air fuel cell with robust stability is highlighted. Benefiting from the water‐resistance effect of the confined nanopores, the highly active cobalt cluster electrocatalysts reside in specific nanopores and possess stable triple‐phase reaction areas, leading to the synergistic optimization of electron conduction, oxygen gas diffusion, and ion transport for electrocatalysis. As a result, the as‐established Zn–air fuel cell shows the best stability under high‐current‐density discharging (>90 h at 100 mA cm⁻²) and superior power density (peak power density: >300 mW cm⁻², specific power: 500 Wg_cat⁻¹) compared to most reported non‐noble‐metal electrocatalysts. The findings will provide new insights in the rational design of electrocatalysts for advanced metal–air fuel cell systems.

中文翻译：

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电催化剂的纳米孔限制可优化具有高稳定性的超高功率密度锌空气燃料电池的三重传输

具有高能量密度，生态友好和低成本的金属-空气燃料电池为未来的电力系统带来了极大的安全性。但是，低功率密度和高电流密度稳定性迫在眉睫的挑战限制了它们的广泛应用。在这项研究中，突出了具有坚固稳定性的超高功率密度Zn空气燃料电池。得益于受限纳米孔的耐水作用，高活性钴簇电催化剂驻留在特定的纳米孔中，并具有稳定的三相反应区域，从而实现了电子传导，氧气扩散和电催化离子迁移的协同优化。结果，已建立的锌空气燃料电池在高电流密度放电（100 mA cm ^-2时> 90 h）下表现出最佳的稳定性。）和比大多数报道的非贵金属电催化剂优越的功率密度（峰值功率密度：> 300 mW cm ^-2，比功率：500 Wg _cat ^-1）。这些发现将为高级金属空气燃料电池系统的电催化剂的合理设计提供新的见解。