Zn-air batteries (ZABs) represent promising candidates for the next generation energy conversion and storage systems based on their superior features to those of lithium-ion batteries, including high theoretical energy density, low cost, and high safety. However, their further development and application is severely lagged due to the lack of high efficient and durable bifunctional oxygen electrocatalysts. The widely applied carbon-based catalysts are thermodynamically instable during battery charging. Herein, TiC supported amorphous MnO_x (a-MnOx/TiC) is reported for the first time as electrocatalyst for the corrosion resistant oxygen electrodes of ZABs. A-MnOx/TiC delivers a remarkable activity and stability toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with a high half-wave potential (0.8 V) for ORR and a low potential (1.56 V) at 10 mA cm^-2 for OER, which far outperforms the state of the art ORR catalyst (Pt/C) and OER catalyst (IrO₂), as well as the Pt/C-IrO₂ and a-MnOx/C bifunctional catalysts. The excellent bifunctional activity of a-MnOx/TiC can be attributed to the efficient synergistic effect between the active amorphous MnOx catalyst and the highly conductive and stable TiC support. More impressively, a-MnOx/TiC demonstrates an outstanding electrochemical stability in strong alkaline electrolyte under OER condition in contrast to the readily oxidized carbon-based a-MnOx/C catalysts. ZAB with a-MnOx/TiC delivers a greater discharge performance with a peak power density of 217.1 mW cm^-2 than that of Pt/C-based ZAB, and a surpassing discharge and charge cycling performance and stability to ZABs with Pt/C-IrO2 and a-MnOx/C. Furthermore, a-MnOx/TiC can be applied for solid-state ZABs which exhibit excellent mechanical flexibility and cycle stability under their flat and bent states. The a-MnOx/TiC bifunctional electrocatalyst with extraordinarily high activity and electrochemical stability provides a promising approach for exploring corrosion resistant electrocatalysts for Zn-air batteries with high efficiency and long-term cycling stability.

锌空气电池（ZABs）代表着下一代能量转换和存储系统的有希望的候选者，因为它们具有锂离子电池的优越特性，包括高理论能量密度，低成本和高安全性。然而，由于缺乏高效和耐用的双功能氧电催化剂，它们的进一步开发和应用严重滞后。广泛应用的碳基催化剂在电池充电过程中热力学不稳定。在此，TiC负载非晶态MnO _x首次报道了（α-MnOx/ TiC）作为ZABs耐腐蚀氧电极的电催化剂。A-MnOx / TiC对氧还原反应（ORR）和氧释放反应（OER）均具有出色的活性和稳定性，ORR的半波电位高（0.8 V），10 mA时电位低（1.56 V）对于OER为cm ^-2，远远优于现有的ORR催化剂（Pt / C）和OER催化剂（IrO ₂）以及Pt / C-IrO ₂和a-MnOx / C双功能催化剂。a-MnOx / TiC的出色的双功能活性可归因于活性无定形MnOx催化剂与高导电性和稳定的TiC载体之间的有效协同作用。更加令人印象深刻的是，与易氧化的碳基a-MnOx / C催化剂相比，a-MnOx / TiC在OER条件下的强碱性电解质中表现出出色的电化学稳定性。具有a-MnOx / TiC的ZAB具有更高的放电性能，峰值功率密度为217.1 mW cm ^-2与基于Pt / C的ZAB相比，具有优于Pt / C-IrO2和a-MnOx / C的ZAB放电和电荷循环性能以及稳定性。此外，α-MnOx/ TiC可以应用于固态ZAB，这些ZAB在其平坦和弯曲状态下具有出色的机械柔韧性和循环稳定性。具有极高活性和电化学稳定性的α-MnOx/ TiC双功能电催化剂为探索具有高效率和长期循环稳定性的锌空气电池的耐腐蚀电催化剂提供了一种有前途的方法。