Developing high-performance cathode is critical to facilitating the development of lithium-oxygen (Li-O₂) batteries. In this work, a low-load (1.32%) Au-Pd alloy decorated carbon fibers binder-free cathode is prepared by facile magnetron sputtering (MS). It is the first use as a cathode material for Li-O₂ batteries, and exhibits excellent electrochemical performance. During the second to the 30th cycle of the battery operation at a current density of 100 mA g⁻¹ with a limited specific capacity density of 1000 mAh g⁻¹, the charge and discharge polarization voltage is only about 0.6 V. In addition, the problem of abnormal charge polarization voltage in the first cycle is also investigated. The by-products Li₂CO₃ are formed during the first discharge, resulting in a significant increase in the charge polarization voltage. The facile preparation method we adopted and our findings may provide new ideas for the future development of Au-Pd alloy composites in Li-O₂ or other metal-air batteries.

开发高性能阴极对于促进锂氧（Li-O ₂）电池的开发至关重要。在这项工作中，通过轻松的磁控溅射（MS）制备了低负载（1.32％）的Au-Pd合金装饰的碳纤维无粘结剂阴极。它是首次用作Li-O ₂电池的正极材料，并具有出色的电化学性能。在以100 mA g ^-1的电流密度和1000 mAh g ^-1的有限比容量密度进行的电池操作的第二至第30个循环期间，充电和放电极化电压仅为约0.6V。还研究了第一周期中电荷极化电压异常的问题。副产物Li ₂在第一次放电过程中会形成CO ₃，导致电荷极化电压显着增加。我们采用的简便的制备方法和我们的发现可能为将来在Li-O ₂或其他金属空气电池中的Au-Pd合金复合材料的开发提供新的思路。