Zinc-air batteries (ZABs) own a great consideration as a promising option for energy storage technology because of their ideal energy density, eco-friendly, inexpensive, and abundant resource. However, the sluggish rates of oxygen reactions on the cathode of ZABs demand the preparation of durable, active, and cost-effective oxygen electrocatalysts. Thus, MnO₂-based nanoparticles (NPs) have been investigated as potential oxygen electrocatalysts for ZABs, which have the advantages of high activity, cost-effectiveness, and excellent durability. Hence, this review aims to contribute a general outline of advancements in MnO₂-based catalysts most recently. The types and structures of MnO₂-based NPs, working mechanism, and electrochemistry of rechargeable ZABs are discussed. Then, different synthesis approaches for MnO₂ NPs in rechargeable ZABs application are highlighted and summarized. The synthesis approaches of MnO_2-based NPs addressed in this review refer to sol-gel, microemulsion, chemical coprecipitation, rheological phase reaction, solid-phase, template, microwave, redox, hydrothermal, and refluxing routes. The impact of the morphology and composition on MnO₂-based NPs in their structural characteristics is summarized. Finally, the current challenges and possible strategies for improving the catalytic activity of MnO₂-based NPs as air catalysts for ZABs are discussed in detail.

锌空气电池（ZABs）因其理想的能量密度、环保、廉价和丰富的资源而被视为一种有前途的储能技术选择。然而，ZABs 阴极上氧反应的缓慢速率需要制备耐用、活性和具有成本效益的氧电催化剂。因此，基于MnO ₂的纳米粒子（NPs）已被研究作为潜在的ZAB 氧电催化剂，其具有高活性、成本效益和优异的耐久性等优点。因此，本综述旨在对基于MnO ₂的催化剂的最新进展做出总体概述。MnO ₂的种类和结构讨论了基于 NPs 的可充电 ZABs 的工作机制和电化学。然后，重点介绍并总结了可充电 ZABs 应用中MnO ₂ NPs 的不同合成方法。本综述中讨论的基于MnO ₂的纳米颗粒的合成方法是指溶胶-凝胶法、微乳液法、化学共沉淀法、流变相反应、固相法、模板法、微波法、氧化还原法、水热法和回流法。总结了形态和组成对基于MnO ₂的纳米颗粒的结构特性的影响。最后，详细讨论了当前的挑战和提高基于MnO ₂的 NPs 作为 ZAB 空气催化剂的催化活性的可能策略。