Sluggish kinetics of oxygen electrocatalysis reactions on the cathode and the strong corrosion of strong alkaline electrolyte seriously affect the cycle life of zinc–air batteries (ZABs). In order to solve the above problem, uniform porous carbon-based highly active bifunctional electrocatalysts together with neutral electrolyte were used to improve the cycle stability of ZABs. Herein, a honeycomb N/S co-doped Co₉S₈ nanoparticle material loaded with a porous carbon skeleton (N/SdCF-OIM/Co₉S₈) as a cathode bifunctional electrocatalyst was designed successfully by using a Co-MOF with a macroporous molecular framework structure as a precursor and introducing SiO₂ spheres as a hard template. The results showed that the designed N/SdCF-OIM/Co₉S₈ exhibits excellent bifunctional electrocatalytic activity (ΔE = 0.77 V) in an alkaline electrolyte. Subsequently, it was further applied to liquid ZABs, and the liquid ZABs based on N/SdCF-OIM/Co₉S₈ showed excellent electrochemical properties in alkaline electrolyte: long charge and discharge cycle stability (170 h/510 cycles), high power density (181 mW cm⁻²) and large specific capacity (803 mA h g⁻¹). In order to further improve the cycle stability of the ZABs based on N/SdCF-OIM/Co₉S₈, neutral electrolyte was used instead of alkaline electrolyte. The results show that the cycle stability of ZABs based on N/SdCF-OIM/Co₉S₈ in neutral electrolyte is greatly improved (1000 h/3000 cycles). This work provides an effective way to prepare ZABs with ultra-long cycle stability.

中文翻译：

---

高活性多孔碳基双功能电催化剂与中性电解质的协同作用：赋予锌空气电池超长循环稳定性

阴极氧电催化反应动力学缓慢以及强碱性电解液的强腐蚀严重影响锌空气电池（ZAB）的循环寿命。为了解决上述问题，采用均匀多孔碳基高活性双功能电催化剂与中性电解质一起提高ZAB的循环稳定性。本文_通过使用具有​_​​_​​以大孔分子骨架结构为前驱体，引入SiO ₂球作为硬模板。结果表明，设计的N/SdCF-OIM/Co ₉ S ₈在碱性电解质中表现出优异的双功能电催化活性（Δ E = 0.77 V）。随后进一步应用于液体ZAB，基于N/SdCF-OIM/Co ₉ S ₈的液体ZAB在碱性电解液中表现出优异的电化学性能：长充放电循环稳定性（170 h/510次循环）、高功率密度（181 mW cm ^-2）和大比容量（803 mA hg ^-1）。为了进一步提高基于N/SdCF-OIM/Co ₉ S ₈的ZAB的循环稳定性，使用中性电解质代替碱性电解质。结果表明，基于N/SdCF-OIM/Co ₉ S ₈的ZABs在中性电解液中的循环稳定性大大提高（1000 h/3000次循环）。该工作为制备具有超长循环稳定性的ZAB提供了一种有效的方法。