The durability and performance of an air electrode can have a crucial impact on rechargeable zinc-air batteries (ZABs). A typical air electrode fabricated using conductive carbon and a polymeric binder suffers rapid degradation during charging, stemming from oxygen bubbles erosion and carbon corrosion. This work presents a durable air electrode having a self-supported sulfur-doped manganese oxides (MnO_x-S) electrocatalyst prepared through hydrothermal process followed by ambient temperature sulfurization. Upon sulfurization, MnO₂ nanoflakes are transformed into MnO_x-S having a heterostructure of Mn₃O₄, MnO₂ and MnS_x. MnO_x-S provided superior electrochemical properties for both oxygen reduction reaction (Tafel slope of 68 mV/dec) and oxygen evolution reaction (Tafel slope of 80 mV/dec). Self-supported electrodes using MnO_x-S and MnO₂ electrocatalysts were scrutinized in a bi-electrode rechargeable ZAB having a stagnant electrolyte. In the ZAB using the self-supported MnO_x-S electrode, both significant discharge peak power density (74 mW/cm² at 135 mA/cm²) as well as low voltage difference between charge and discharge processes (0.75 V) were observed. In addition, for charge-discharge cycling at 20 mA/cm², the ZAB using the self-supported MnO_x-S electrode achieved stable cycling through 2000 cycles without apparent degradation. The air electrode having the self-supported MnO_x-S paves the way for a more durable and higher performance favoring practical application for rechargeable ZABs.

空气电极的耐用性和性能对可充电锌空气电池 (ZAB) 具有至关重要的影响。使用导电碳和聚合物粘合剂制造的典型空气电极在充电过程中会因氧气泡侵蚀和碳腐蚀而快速降解。这项工作提出了一种耐用的空气电极，它具有自支撑的掺硫锰氧化物 (MnO _x -S) 电催化剂，通过水热法和环境温度硫化制备。在硫化时，MnO ₂纳米薄片转变为具有Mn ₃ O ₄、MnO ₂和MnS _x异质结构的MnO _x -S 。MnO的_X-S 为氧还原反应（塔菲尔斜率为 68  mV/dec）和析氧反应（塔菲尔斜率为 80  mV/dec）提供了优异的电化学性能。在具有停滞电解质的双电极可充电 ZAB 中仔细检查使用 MnO _x -S 和 MnO ₂电催化剂的自支撑电极。在ZAB使用自支撑的MnO _X -S电极，二者显著放电峰值功率密度（74 毫瓦/平方厘米²，在135 毫安/厘米²）之间以及充电和放电过程的低压差（0.75  V）中观察到. 此外，对于 20  mA/cm ^{2 的}充放电循环，使用自支撑 MnO _x -S 电极的 ZAB 在2000 次循环中实现了稳定循环而没有明显降解。具有自支撑 MnO _x -S的空气电极为更耐用和更高性能的可充电 ZAB 的实际应用铺平了道路。