Designing the highly catalytic activity and durable bifunctional catalysts toward oxygen reduction/evolution reaction (ORR/OER) is paramount for metal–air batteries. Metal–organic frameworks (MOFs)-based materials have attracted a great deal of attention as the potential candidate for effectively catalyzing ORR/OER due to their adjustable composition and porous structure. Herein, we first introduce the Mn species into zeolitic-imidazole frameworks (ZIFs) and then further pyrolyze the Mn-containing bimetallic ZIFs to synthesize core-shell-structured Co@Co₄N nanoparticles embedded into MnO-modified porous N-doped carbon nanocubes (Co@Co₄N/MnONC). Co@Co₄N/MnONC exhibits the outstanding catalytic activity toward ORR and OER which is attributed to its abundant pyridinic/graphitic N and Co₄N, the optimized content of MnO species, highly dispersed catalytic sites and porous carbon matrix. As a result, the Co@Co₄N/MnONC-based Zn–air battery exhibits enhanced performances, including the high discharge capacity (762 mAh g_Zn⁻¹), large power density (200.5 mW cm⁻²), stable potential profile over 72 h, low overpotential (<1.0 V) and superior cycling life (2800 cycles). Moreover, the belt-shaped Co@Co₄N/MnONC cathode-based Zn–air batteries are also designed which exhibit the superb electrochemical properties at different bending/twisting conditions.

对于金属-空气电池，设计具有高催化活性和耐用的双功能催化剂以进行氧还原/逸出反应（ORR / OER）至关重要。基于金属有机骨架（MOF）的材料由于其可调节的成分和多孔结构，成为有效催化ORR / OER的潜在候选者，引起了广泛的关注。在本文中，我们首先将Mn物种引入沸石-咪唑骨架（ZIFs），然后进一步热解含Mn的双金属ZIF，以合成嵌入MnO改性的多孔N掺杂碳纳米粒子中的核壳结构Co @ Co ₄ N纳米粒子。 （Co @ Co ₄ N / MnO NC）。Co @ Co ₄ N / MnONC对ORR和OER具有出色的催化活性，这归因于其丰富的吡啶/石墨N和Co ₄ N，优化的MnO含量，高度分散的催化位点和多孔碳基质。结果，基于Co @ Co ₄ N / MnO NC的锌空气电池表现出增强的性能，包括高放电容量（762 mAh g _Zn ^-1），大功率密度（200.5 mW cm ^-2），稳定的电势超过72小时的低功耗（<1.0 V）和更长的循环寿命（2800个循环）。此外，带状Co @ Co ₄ N / MnO还设计了基于NC阴极的Zn-空气电池，它们在不同的弯曲/扭曲条件下均表现出极好的电化学性能。